David's Astronomy - Astronomical Transients 2024

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Astronomical Transients - 2024

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Transients
2024

This page documents observations and images of Astronomical Transients (AT) with discovery dates in 2024.
(Note: Supernovae in 2024 are presented on a separate page : SN 2024 )
(Note: Some images may roll over into the following year)

Galactic Transients (2024)
     Name, type, discovery date

AT 2024ll - CV Type Transient (2024-01-04) (non-detection)

AT 2024mu - CV Type Transient (2024-01-04)

AT 2024nn - CV Type Transient (2024-01-03) (non-detection)

AT 2024vf - CV Type Transient (2024-01-09)

AT 2024ajb - Transient (2024-01-16) (non-detection)

AT 2024agp - CV Type Transient (2024-01-15)

AT 2024crd - Type Nova? Transient (2024-02-14)

AT 2024ctz - CV Type Transient (2024-02-15)

AT 2024dcg - CV Type Transient (2024-02-19)

AT 2024djo - Type MP Transient (2024-02-28) (Attempt)

AT 2024dof - CV Type Transient (2024-02-25)

AT 2024dsj - CV Type Transient (2024-02-28)

AT 2024eim - Type YSO? Transient (2024-03-12) in M42

AT 2024epa - CV Type Transient (2024-03-15)

Extragalactic Transients (2024)
     Name, type, discovery date, host galaxy (if relevant)

M31 Transients

AT 2024ccb - EGN Transient (2024-02-10) in M31

M33 Transients

Other Extragalactic Transients

AT 2024bv - Transient (2024-01-02) in UGC 12604

AT 2024cp - Transient (2024-01-02) in CGCG 108-092

AT 2024dda - Type MP Transient (2024-02-20) in NGC 3467

AT 2024epz - Transient (2024-03-19) in UGC 2964

AT 2024grb - Transient (2024-04-16) in NGC 5235

AT 2024grw - Transient (2024-04-17) in UGC 11067

Galactic Transients (2024)

AT 2024ll - CV Type Transient (discovered 2024-01-04) - non detection

AT 2024ll (Taurus)
AT 2024ll (Type: CV) discovered 2024-01-04.756 UT by XOSS
Alias: KATS24A001, TCP J05103196+2336557
Discovery magnitude 16.65 (Clear Filter)
( TNS 2024ll )

AT 2024ll - 2024-03-04 (T+60.2d)
Image below (2024-03-04.911) was taken 60.2 days after discovery of 2024ll
Position of earlier transient (no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +18.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-04 21:53 UT (#1196055-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024mu - CV Type Transient (discovered 2024-01-04)

AT 2024mu (Hercules)
AT 2024mu (Type: CV) discovered 2024-01-04.095 UT by Gaia
Alias: Gaia24adj
Discovery magnitude 15.35 (G-Gaia Filter)
vs Historic Magnitude 17.42 +/- 1.07 (SD)
(Usual magnitude 19.0 +/- 0.8)
Outburst in confirmed CV ASASSN-13bc
( TNS 2024mu | Gaia24adj )

AT 2024mu - 2024-01-08 (T+4.0d)
Image below (2024-01-08.057) was taken 4.0 days after discovery of 2024mu
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.49 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-08 01:25 UT (#1180143-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024mu - 2024-01-17 (T+13.1d)
Image below (2024-01-17.237) was taken 13.1 days after discovery of 2024mu
Position of reported transient (very faint) is shown by white cross-hairs
Estimated Magnitude +18.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-17 05:43 UT (#1183123-26)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024nn - CV Type Transient (discovered 2024-01-03) - non-detection

AT 2024nn (Hydra)
AT 2024nn (Type: CV) discovered 2024-01-03.870 UT by XOSS
Alias: KATS24A003, TCP J09113728-1229315, Gaia24aer
Discovery magnitude 16.92 (Clear Filter)
Apparently hostless blue transient
( TNS 2024nn | Gaia24aer )

AT 2024nn - 2024-02-24 (T+52.1d)
Image below (2024-02-24.948) was taken 52.1 days after discovery of 2024nn
Position of reported transient (not visible, likely faded) is shown by white cross-hairs
Non-Detection, Limiting Magnitude +17.7 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 22:47 UT (#1191097-100)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024vf - CV Type Transient (discovered 2024-01-09)

AT 2024vf (Cancer)
AT 2024vf (Type: CV) discovered 2024-01-09.678 UT by Tadashi Kojima
Alias: TCP J09174122+0736487
Discovery magnitude 14.0 (Clear Filter)
Corresponds to SDSS J091741.29+073647.4,
Cataclysmic Binary Candidate with normal magnitude 21.5
( TNS 2024vf )

Starfield with AT 2024vf (T+3.3d) and multiple faint galaxies.
brightest galaxies in FOV are PGC 1327780 (catalog mag +16.9),
PGC 1324005 (catalog mag +17.0) & PGC 1328138 (catalog mag +17.2)
Other galaxies with magnitude +17.0 to +18.5

Annotated CCD Image (70% size, square root scale)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-12 23:35 UT (#1181074-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024vf - 2024-01-12 (T+3.3d)
Image below (2024-01-12.981) was taken 3.3 days after discovery of 2024vf
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +14.64 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-12 23:35 UT (#1181074-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024vf - 2024-02-13 (T+35.3d)
Image below (2024-02-13.992) was taken 35.3 days after discovery of 2024vf
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +16.37 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 23:52 UT (#1185141-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024vf - 2024-02-16 (T+38.3d)
Image below (2024-02-16.949) was taken 38.3 days after discovery of 2024vf
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Mag +18.2 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-16 22:49 UT (#1186110-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024ajb - Transient (discovered 2024-01-16) - non-detection

AT 2024ajb (Auriga)
AT 2024ajb (Type: unk) discovered 2024-01-16.406 UT by ATLAS
Alias: ATLAS24azn
Discovery magnitude 16.75 (orange-ATLAS Filter)
( TNS 2024ajb )

AT 2024ajb - 2024-02-24 (T+39.5d)
Image below (2024-02-24.931) was taken 39.5 days after discovery of 2024ajb
Position of reported transient (not visible, likely faded) is shown by white cross-hairs
Non-Detection, Limiting Magnitude +18.0 (Clear Filter)
Bright star in FOV is 51 Aur / HIP 31771 (mag 5.70)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 22:29 UT (#1191090-94)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024agp - CV Type Transient (discovered 2024-01-15)

AT 2024agp (Auriga)
AT 2024agp (Type: CV) discovered 2024-01-15.768 UT by XOSS
Alias: KATS24A004, ATLAS24azp, TCP J05363231+4201536
Discovery magnitude 16.76 (Clear Filter)
( TNS 2024agp )

AT 2024agp - 2024-02-22 (T+38.2d)
Image below (2024-02-22.921) was taken 38.2 days after discovery of 2024agp
Position of earlier transient (not visible) is shown by white circle
Non-Detection, Limiting Magnitude +17.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 05:04 UT (#1189236-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - Type Nova? Transient (discovered 2024-02-14)

AT 2024crd (Virgo)
AT 2024crd (Type: Nova?) discovered 2024-02-14.750 UT by Tadashi Kojima
Alias: TCP J13530185+0522000, Gaia24apm
Discovery Magnitude 13.2 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 15.2
Transient on faint blue PanSTARRS source
( TNS 2024crd | Gaia24apm )

AT 2024crd (T+6.3d)

Annotated CCD Image (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-21 01:35 UT (#1187140-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-02-21 (T+6.3d)
Image below (2024-02-21.064) was taken 6.3 days after discovery of 2024crd
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +13.45 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-21 01:35 UT (#1187140-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-02-23 (T+8.3d)
Image below (2024-02-23.003) was taken 8.3 days after discovery of 2024crd
Position of reported transient (distinct, but fading) is shown by white cross-hairs
Measured Magnitude +13.80 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 00:08 UT (#1189162-66)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-02-24 (T+9.3d)
Image below (2024-02-24.042) was taken 9.3 days after discovery of 2024crd
Position of reported transient (distinct, fading ?) is shown by white cross-hairs
Measured Magnitude +14.02 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 01:03 UT (#1190154-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-02-25 (T+10.3d)
Image below (2024-02-25.039) was taken 10.3 days after discovery of 2024crd
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured Magnitude +14.12 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 00:59 UT (#1191170-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-03-16 (T+30.3d)
Image below (2024-03-16.056) was taken 30.3 days after discovery of 2024crd
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +15.59 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-16 01:24 UT (#1198135-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-03-22 (T+36.3d)
Image below (2024-03-22.055) was taken 36.3 days after discovery of 2024crd
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +15.76 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-22 01:22 UT (#1200021-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-03-31 (T+45.3d)
Image below (2024-03-31.039) was taken 45.3 days after discovery of 2024crd
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +16.97 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-31 00:58 UT (#1203120-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-04-10 (T+55.3d)
Image below (2024-04-10.024) was taken 55.3 days after discovery of 2024crd
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +17.46 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-10 00:37 UT (#1205027-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-04-11 (T+56.3d)
Image below (2024-04-11.027) was taken 56.3 days after discovery of 2024crd
Position of reported transient (brightening again) is shown by white cross-hairs
Measured Magnitude +15.75 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-11 00:42 UT (#1206039-42)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-04-13 (T+58.3d)
Image below (2024-04-13.006) was taken 58.3 days after discovery of 2024crd
Position of reported transient (fading again) is shown by white cross-hairs
Measured Magnitude +17.81 (Clear Filter)
2 mag dimming in 48 hrs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 00:12 UT (#1207031-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-04-14 (T+59.3d)
Image below (2024-04-14.012) was taken 59.3 days after discovery of 2024crd
Position of reported transient (brightening again) is shown by white cross-hairs
Measured Magnitude +15.79 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-14 00:20 UT (#1208033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-04-17 (T+63.2d)
Image below (2024-04-17.944) was taken 63.2 days after discovery of 2024crd
Position of reported transient (diming slightly) is shown by white cross-hairs
Measured Magnitude +15.95 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-17 22:42 UT (#1209049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024crd - 2024-04-30 (T+76.2d)
Image below (2024-04-30.999) was taken 76.2 days after discovery of 2024crd
Position of reported transient (significantly faded) is shown by white cross-hairs
Estimatedd Magnitude +18.6 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-05-01 00:01 UT (#1213019-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024ctz - CV Type Transient (discovered 2024-02-15)

AT 2024ctz (Hydra)
AT 2024ctz (Type: CV) discovered 2024-02-15.810 UT by MASTER
Alias: MASTER OT J092248.85-042426.8
Discovery Magnitude 15.9 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 20.6
( TNS 2024ctz )

AT 2024ctz - 2024-02-24 (T+9.1d)
Image below (2024-02-24.954) was taken 9.1 days after discovery of 2024ctz
Position of reported transient (very faint, fading rapidly) is shown by white cross-hairs
Measured Magnitude +17.24 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 22:57 UT (#1191104-08)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dcg - CV Type Transient (discovered 2024-02-19)

AT 2024dcg (Lynx)
AT 2024dcg (Type: CV) discovered 2024-02-19.350 UT by ATLAS
Alias: ATLAS16dzn
Discovery magnitude 16.15 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.51
( TNS 2024dcg )

AT 2024dcg - 2024-02-22 (T+2.7d)
Image below (2024-02-22.016) was taken 2.7 days after discovery of 2024dcg
Position of reported transient (not visible / unconfirmed ) is shown by white cross-hairs
Measured Magnitude +15.39 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 120s exposure (average combine), 3x3 binning, Clear Filter
2024-02-22 00:25 UT (#1188131-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dcg - 2024-02-25 (T+5.7d)
Image below (2024-02-25.071) was taken 5.7 days after discovery of 2024dcg
Position of reported transient (faint) is shown by white cross-hairs
Measured Magntitude +15.65 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 120s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 01:48 UT (#1191189-93)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dcg on Transients 2024 Page >>

AT 2024djo - Type MP Transient (discovered 2024-02-28) (Attempt)

AT 2024djo (Camelopardalis)
AT 2024djo (Type: MP) discovered 2024-02-28.634 UT by MASTER
Alias: MASTER OT J075622.70+594105.8
Discovery Magnitude 13.2 (Clear Filter)
vs Prior Non-Detection Limiting Mag 17.9
( TNS 2024djo )

AT 2024djo - 2024-03-13 (T+14.3d)
Image below (2024-03-13.940) was taken 14.3 days after discovery of 2024djo
Position of reported transient (not visible, presumed faded) is shown by white cross-hairs
Non-Detection, Limiting Magnitude +17.8 (Clear Filter)
Transient appears to have faded and returned to its normal state
Adjacent bright star is HIP 38791 (catalog mag +7.72)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-03-13 22:34 UT (#1197106)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024djo on Transients 2024 Page >>

AT 2024dof - CV Type Transient (discovered 2024-02-25)

AT 2024dof (Cassiopeia)
AT 2024dof (Type: CV) discovered 2024-02-25.965 UT by Gaia
Alias: Gaia24asd
Discovery Magnitude 11.16 (G-Gaia Filter)
vs Historic Magnitude 11.39 +/- 0.06 SD
Brightening in Be star
TNS discovery report on TNS says
Prior Non-Detection Limiting Mag 21.5
but Gaia data for the same date gives mag 11.39)
( TNS 2024dof | Gaia24asd)

AT 2024dof - 2024-03-13 (T+16.9d)
Image below (2024-03-13.823) was taken 16.9 days after discovery of 2024dof
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +10.85 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-13 19:48 UT (#1197006-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dof on Transients 2024 Page >>

AT 2024dsj - CV Type Transient (discovered 2024-02-28)

AT 2024dsj (Cassiopeia)
AT 2024dsj (Type: CV) discovered 2024-02-28.787 UT by Gaia
Alias: Gaia24ath
Discovery Magnitude 15.25 (G-Gaia Filter)
vs Historic Magnitude 15.03 +/- 0.02 SD
Gaia source fades by 0.2 mag
TNS discovery report on TNS says
Prior Non-Detection Limiting Mag 21.5 (2024-01-25 17:32)
but Gaia data for the same date gives mag 15.26)
( TNS 2024dsj | Gaia24ath)

AT 2024dsj - 2024-03-13 (T+14.1d)
Image below (2024-03-13.857) was taken 14.1 days after discovery of 2024dsj
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +14.57 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-13 20:37 UT (#1197049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dsj - 2024-03-16 (T+16.3d)
Image below (2024-03-16.119) was taken 16.3 days after discovery of 2024dsj
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +14.44 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-16 02:55 UT (#1198168-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dsj - 2024-03-22 (T+22.4d)
Image below (2024-03-22.142) was taken 22.4 days after discovery of 2024dsj
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +14.49 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-22 03:28 UT (#1200079-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dsj - 2024-03-28 (T+28.3d)
Image below (2024-03-28.085) was taken 28.3 days after discovery of 2024dsj
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +14.46 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-28 02:05 UT (#1201069-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dsj - 2024-04-27 (T+58.3d)
Image below (2024-04-27.059) was taken 58.3 days after discovery of 2024dsj
Position of reported transient (faint, brightened slighly ?) is shown by white cross-hairs
Measured Magnitude +14.37 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-27 01:28 UT (#1212012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024eim - Type YSO? Transient (discovered 2024-03-12) in M42

AT 2024eim (Orion)
AT 2024eim (Type: YSO?) discovered 2024-03-12.402 UT by Gaia
Alias: Gaia24ayl
Discovery Magnitude 11.96 (G-Gaia Filter)
vs Historic Magnitude 13.17 +/- 0.38 SD
Brightening in candidate YSO
( TNS 2024eim | Gaia24ayl )

AT 2024eim in M42 (T+8.5d)
Image below (2024-03-20.886) was taken 8.5 days after discovery of 2024eim
Position of reported transient (visible) is shown by white cross-hairs

Annotated negative CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-20 21:25 UT (#1199049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024eim - 2024-03-20 (T+8.5d)
Image below (2024-03-20.886) was taken 8.5 days after discovery of 2024eim
Position of reported transient (visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
Image details as above

Images of AT 2024eim on Transients 2024 Page >>

AT 2024epa - CV Type Transient (discovered 2024-03-15)

AT 2024epa (Aquila)
AT 2024epa (Type: CV) discovered 2024-03-15.507 UT by Gaia
Alias: Gaia24azt
Discovery Magnitude 13.72 (G-Gaia Filter)
vs Historic Magnitude 13.93 +/- 0.03 SD
~0.3 mag rise in Gaia source
( TNS 2024epa | Gaia24azt )

AT 2024epa - 2024-03-22 (T+6.6d)
Image below (2024-03-22.117) was taken 6.6 days after discovery of 2024epa
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +13.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-22 02:52 UT (#1200057-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024epa - 2024-04-11 (T+26.6d)
Image below (2024-04-11.127) was taken 26.6 days after discovery of 2024epa
Position of reported transient (stable ?) is shown by white cross-hairs
Measured Magnitude +13.81 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-11 03:06 UT (#1206104-08)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024epa - 2024-04-13 (T+28.6d)
Image below (2024-04-13.075) was taken 28.6 days after discovery of 2024epa
Position of reported transient (stable) is shown by white cross-hairs
Measured Magnitude +13.82 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 01:51 UT (#1207066-70)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Extragalactic Transients (2024)

M31 Transients (2024)

AT 2024ccb - EGN Transient (discovered 2024-02-10) in M31

M31 with AT 2024ccb (Andromeda)
AT 2024ccb (Type: EGN) discovered 2024-02-10.594 UT by XOSS
Alias: PSP24L, PNV J00425721+4119038, ATLAS24chb
Discovery Mag 17.74 (Clear Filter)
Low S/N spectrum resembles that of a Nova in M31
as already reported by Reguitti et al. (AstroNote 2024-50)
( TNS 2024ccb )

M31 - Spiral Galaxy with Nova AT 2024ccb (T+2.3d)
Cam2 Reference Image
Position of AT 2024ccb (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse (corners only)

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2024-02-12 21:42 UT
TS 80mm APO, ZWO ASI178MC

M31 with Nova AT 2024ccb (T+2.3d)
Position of reported nova (faint) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-12 21:47 UT (#1184023-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with Nova AT 2024ccb - 2024-02-12 (T+2.3d)
Image below (2024-02-12.905) was taken 2.3 days after discovery of 2024ccb
Position of reported transient (faint, brightening) is shown by white cross-hairs
Measured Magnitude +16.04 (Clear Filter)

Nova M31 AT 2024ccb - 2024-02-13 (T+3.3d)
Image below (2024-02-13.858) was taken 3.3 days after discovery of 2024ccb
Position of reported transient (faint, brightening slightly ?) is shown by white cross-hairs
Measured Magnitude +15.96 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 20:43 UT (#1185050-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2024ccb - 2024-02-20 (T+10.4d)
Image below (2024-02-20.983) was taken 10.4 days after discovery of 2024ccb
Position of reported transient (very faint, barely visible) is shown by white cross-hairs
Estimated Magnitude +16.0 to +16.5 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-20 23:44 UT (#1187093-97)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova AT 2024ccb (in M31) on Transients 2024 Page >>

M33 Transients (2024)

Other Extragalactic Transients (2024)

AT 2024bv - Transient (discovered 2024-01-02) in UGC 12604

UGC 12604 with AT 2024bv (Pegasus)
AT 2024bv (Type: unk) discovered 2024-01-02.211 UT by PS1
Alias: PS24ao
Discovery Magnitude 17.40 (orange-ATLAS Filter)
( TNS 2024bv )

UGC 12604 - Spiral Galaxy

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 21:28 UT (#1180047-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 12604 with AT 2024bv - 2024-01-07 (T+5.7d)
Image below (2024-01-07.888) was taken 5.7 days after discovery of 2024bv
Position of reported transient (not distinguishable) is shown by white cross-hairs

UGC 12604 with AT 2024bv - 2024-01-12 (T+10.6d)
Image below (2024-01-12.803) was taken 10.6 days after discovery of 2024bv
Position of reported transient (not distinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-12 19:22 UT (#1181054-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024cp - Transient (discovered 2024-01-02) in CGCG 108-092

CGCG 108-092 with AT 2024cp (Hercules)
AT 2024cp (Type: unk) discovered 2024-01-02.547 UT by ALeRCE
Alias: ZTF24aaadlka
Discovery Magnitude 17.17 (r-ZTF Filter)
( TNS 2024cp | Gaia24azt )

CGCG 108-092 - Galaxy with AT 2024cp (T+99.5d)
CGCG 108-092 / PGC 56896 (catalog mag +15.8)
with numerous adjacent galaxies
PGC 56872 (catalog mag +14.7), PGC 56886 (catalog mag +15.6),
PGC 1504900 (catalog mag +16.7), PGC 1505972 (catalog mag +16.9)
PGC 1506589 (catalog mag +17.2), PGC 1506452 (catalog mag +17.2),
PGC 1507739 (catalog mag +17.3), PGC 1507209 (catalog mag +17.3),
PGC 1508450 (catalog mag +17.3), PGC 1506573 (catalog mag +17.4)
PGC 1506870 (catalog mag +17.6) + several other faint galaxies.

Annotated CCD Image (70% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-11 01:38 UT (#1206060-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

CGCG 108-092 with AT 2024cp - 2024-04-11 (T+99.5d)
Image below (2024-04-11.063) was taken 99.5 days after discovery of 2024cp
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured Magnitude (Galaxy+Transient) +15.00 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-11 01:38 UT (#1206060-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dda - Type MP Transient (discovered 2024-02-20) in NGC 3467

NGC 3467 with AT 2024dda (Leo)
AT 2024dda (Type: MP) discovered 2024-02-20.987 UT by Italian Supernovae Search Project
Alias: MP (18961
Discovery Magnitude 17.94 (Clear Filter)
vs Prior Non-Detection Limiting Mag 19.0
( TNS 2024dda )

NGC 3467 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-15 21:31 UT (#1198056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3467 with AT 2024dda - 2024-02-29 (T+9.0d)
Image below (2024-02-29.995) was taken 9.0 days after discovery of 2024dda
Position of reported transient (not visible) is indicated by white cross-hairs.
Poor quality image (cloud / single frame)

Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-02-29 23:53 UT (#1195054)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3467 with AT 2024dda - 2024-03-15 (T+23.9d)
Image below (2024-03-15.891) was taken 23.9 days after discovery of 2024dda
Position of reported transient (not visible) is indicated by white cross-hairs.
Non-Detection Limiting Magnitude +17.6 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-15 21:31 UT (#1198056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024epz - Transient (discovered 2024-03-19) in UGC 2964

UGC 2964 with AT 2024epz (Taurus)
AT 2024epz (Type: unk) discovered 2024-03-19.284 UT by ATLAS
Alias: ATLAS24efj
Discovery Magnitude 18.42 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Mag 18.68
( TNS 2024epz )

UGC 2964 - Spiral Galaxy with AT 2024epz

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-20 21:02 UT (#1199042-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 2964 with AT 2024epz - 2024-03-20 (T+1.6d)
Image below (2024-03-20.872) was taken 1.6 days after discovery of 2024epz
Position of reported transient (faint) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-20 21:02 UT (#1199042-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 2964 with AT 2024epz - 2024-03-29 (T+10.6d)
Image below (2024-03-29.882) was taken 10.6 days after discovery of 2024epz
Position of reported transient (not visible) is indicated by white cross-hairs.
Very poor quality image (cloud / poor transparency)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-29 21:15 UT (#1202018-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 2964 with AT 2024epz - 2024-03-30 (T+11.6d)
Image below (2024-03-30.881) was taken 11.6 days after discovery of 2024epz
Position of reported transient (not distinguishable) is indicated by white cross-hairs.
Non-Detection Limiting Magnitude +18.2 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-30 21:13 UT (#1203027-29)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024grb - Transient (discovered 2024-04-16) in NGC 5235

NGC 5235 with AT 2024grb (Virgo)
AT 2024grb (Type: unk) discovered 2024-04-16.418 UT by ATLAS
Alias: ATLAS24fuq
Discovery Magnitude 18.33 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 20.08
( TNS 2024grb )

NGC 5235 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-17 22:25 UT (#1209042-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5235 with AT 2024grb - 2024-04-17 (T+1.5d)
Image below (2024-04-17.928) was taken 1.5 days after discovery of 2024grb
Position of reported transient (faint) is shown by white cross-hairs
Estimated Magnitude +17.0 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-17 22:25 UT (#1209042-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5235 with AT 2024grb - 2024-04-25 (T+9.5d)
Image below (2024-04-25.963) was taken 9.5 days after discovery of 2024grb
Position of reported transient (faint) is shown by white cross-hairs
Estimated Magnitude +17.0 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-25 23:14 UT (#1211014-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024grw - Transient (discovered 2024-04-17) in UGC 11067

UGC 11067 with AT 2024grw (Ophiuchus)
AT 2024grw (Type: unk) discovered 2024-04-17.131 UT by ATLAS
Alias: ATLAS24fvu
Discovery Magnitude 18.36 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 20.09
( TNS 2024efn )

UGC 11067 with AT 2024grw - 2024-04-27 (T+10.0d)
Image below (2024-04-27.104) was taken 10.0 days after discovery of 2024grw
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +16.94 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-27 02:38 UT (#1212049-52)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

This Web Page:	Astronomical Transients - 2024
Last Updated :	2024-05-01
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site

David's Astronomy Pages (Deep Sky) Astronomical Transients - 2024