David's Astronomy - Images 2025-04-11 (S1315)

David's Astronomy Pages
Images - Session 1315 (2025-04-11)

Images
(S1314)

Images
Main

Home
Page

Images
(S1316)

Objects Session Notes

29P/Schwassmann-Wachmann - Comet

C/2025 F2 (SWAN) - Comet

KIC 8462852 - Variable Star (Tabby's Star)

AT 2022abs - CV Type Transient (non-detection)

AT 2022cya - CV Type Transient (non-detection)

AT 2022pxo - CV Type Transient (non-detection)

AT 2023ij - CV Type Transient

AT 2023hru - CV Type Transient (non-detection)

AT 2023ygv - Transient (non-detection)

AT 2024slv - CV Type Transient

AT 2024xpy - Type BL Transient

AT 2024aasb - Type YSO? Transient

AT 2025fwb - Type CV? Transient

LEDA 1776479 - Galaxy with Type Ia-02cx Supernova 2025gcv

NGC 2890 - Elliptical Galaxy with Type Ia Supernova 2023xnl (non-detection)

NGC 3277 - Spiral Galaxy with Type Ib-Ca-rich Supernova 2025coe

NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

SN 2023nlk - Type Ia Supernova in WISEA Galaxy (non-detection)

UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs

UGC 12293 - Spiral Galaxy with Transient AT 2025gyi (non-detection)

- AT2025gcz attempt failed (due to bad guiding/cloud)

Variable Stars (photometric monitoring)

- T CrB, BL Lac, KIC 8462852

Nearby Stars (astrometric monitoring)

- None

- All-Night Session (7.1 hr)

- 12" LX200 + ST-10XME for imaging

- TS 80mm APO + ZWO ASI178MC for guiding & imaging

- Ambient Temperature: 1.5°C (min)

- CCD Temperature: -15°/-20°C

- Notes from 2025-04-11 >>

-

29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-04-11 (passing through Leo) Sun Distance 6.27 AU (turning ?) Earth Distance 5.70 AU (852.5 million km)		29P/Schwassmann-Wachmann - 2025-04-11 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -3.67 arcsec/hr, Dec 0.81 arcsec/hr)

Annotated CCD Image (50% size, square root scale) 8 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 22:18 UT (#1315041-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, square root scale, cropped) Image details as left

29P/Schwassmann-Wachmann - Earlier Image 2025-04-09 Showing motion of comet relative to HIP 47151 over 2 day period

Annotated CCD Image (50% size, square root scale) 9 x 90s exposure (median average combine), 3x3 binning, Clear Filter 2025-04-09 21:54 UT (#1313022-30) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of 29P/Schwassmann-Wachmann on Comets 2023 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2024 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2025 Page >>

C/2025 F2 (SWAN) - Comet

C/2025 F2 (SWAN) - 2025-04-12 (passing through Pegasus) Sun Distance 0.62 AU (approaching) Earth Distance 1.29 AU (193.6 million km)		C/2025 F2 (SWAN) - 2025-04-12 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 247.45 arcsec/hr, Dec 112.16 arcsec/hr)

Annotated CCD Image (50% size, square root scale) 60s exposure (single frame), 3x3 binning, Clear Filter 2025-04-12 03:23 UT (#1315172) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, log scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-04-12 03:25 UT (#1315171-74) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

C/2025 F2 (SWAN) - 2025-04-12 Detail Highlighting the comet's thin but obvious tail		C/2025 F2 (SWAN) - 2025-04-12 Detail Showing faint tail

Negative CCD Image (50% size, square root scale) Image details as above		Annotated CCD Image (70% size, log scale, cropped) Image details as above

Images of C/2025 F2 (SWAN) on Comets 2025 Page >>

KIC 8462852 - Variable Star (Tabby's Star)

KIC 8462852 / Tabby's Star (Cygnus)
Alias: Boyajian's Star, WTF Star ("Where’s the Flux?")
Distance 1470 ly. Magnitude +11.7
Star shows large irregular dimmings.
KIC 8462852 shown by white cross-hairs

KIC 8462852 - Image (2025-04-12)
Measured Mag +11.81 ('V') from CCDSoft Cursor Information

Annotated CCD Image (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2025-04-12 00:12 UT (#1315090-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852 - Previous Image (2023-08-19)
Measured Mag +11.93 ('V') from CCDSoft Cursor Information

Annotated CCD Image (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2023-08-19 23:48 UT (#1131095-97)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852 - Previous Image (2022-05-12)
Measured Mag +11.89 (V)

Annotated CCD Image (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2022-05-12 01:25 UT (#1009094-96)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852 - Previous Image (2022-03-20)
Measured Mag +12.01 (V)

Annotated CCD Image (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2022-03-20 04:18 UT (#989258-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852 Links:
AAVSO Info : https://www.aavso.org/category/tags/kic-8462852

Unofficial Page for Where's the Flux?

Discovery Paper: 1509.03622.pdf (arxiv.org)

AT 2022abs - CV Type Transient (non-detection)

AT 2022abs (Hercules)
AT 2022abs (Type: CV) discovered 2022-01-20.144 UT by MASTER
Alias: MASTER OT J173432.09+191254.2
Discovery Magnitude 15.6 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 20.5
( TNS 2022abs )

AT 2022abs - 2025-04-12 (T+1177.9d)
Image below (2025-04-12.014) was taken 1177.9 days after discovery of 2022abs
Position of earlier transient (not visible) is shown by white cross-hairs

Annotated CCD Image (125% size, square root scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 00:24 UT (#1315095-99)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022abs on Transients 2022 Page >>

AT 2022cya - CV Type Transient (non-detection)

AT 2022cya (Aquila)
AT 2022cya (Type: CV) discovered 2022-02-20.486 UT by Gaia
Alias: Gaia22ask
Alerting Magnitude 15.94 (G-Gaia Filter)
vs Historic Magnitude 17.85 +/- 0.97 SD
3 mag outburst in candidate CV ASASSN-18sr
( TNS 2022cya | Gaia22ask )

AT 2022cya - 2025-04-12 (T+1146.6d)
Image below (2025-04-12.054) was taken 1146.6 days after discovery of 2022cya
Position of earlier transient (not visible) is shown by white cross-hairs
Non-detection Limiting Magnitude +18.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 01:21 UT (#1315117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022cya - Detail (T+1146.6d)

Annotated CCD Image (175% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 01:21 UT (#1315117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (175% size, linear scale, cropped)
Image details as above

Images of AT 2022cya on Transients 2022 Page >>

AT 2022pxo - CV Type Transient (non-detection)

AT 2022pxo (Ophiuchus)
AT 2022pxo (Type: CV) discovered 2022-07-29.022 UT by MASTER
Alias: MASTER OT J184424.60+114014.4
Discovery Magnitude 15.6 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 17.7
Long variable (M)
( TNS 2022cya )

AT 2022pxo - 2025-04-12 (T+988.1d)
Image below (2025-04-12.134) was taken 988.1 days after discovery of 2022pxo
Position of earlier transient (not visible) is shown by white cross-hairs
Non-detection Limiting Magnitude +17.5 (Clear Filter)

Annotated CCD Image (125% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 03:14 UT (#1315167-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022pxo on Transients 2022 Page >>

AT 2023ij - CV Type Transient

AT 2023ij (Ophiuchus)
AT 2023ij (Type: CV) discovered 2023-01-11.750 UT by Gaia
Alias: Gaia23aft
Discovery Magnitude 16.57 (G-Gaia Filter)
vs Historic Magnitude 16.84 +/- 0.06 SD
0.25 long slow rise in Gaia and WISE source
( TNS 2023ij | Gaia23aft )

AT 2023ij - 2025-04-12 (T+821.3d)
Image below (2025-04-12.094) was taken 821.3 days after discovery of 2023ij
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +16.35 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 02:18 UT (#1315138-42)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023ij on Transients 2023 Page >>

AT 2023hru - CV Type Transient (non-detection)

AT 2023hru (Cygnus)
AT 2023hru (Type: CV) discovered 2023-05-08.269 UT by GEOTS
Alias: GEOTS-Balaji-2023-001, TCP J19461218+3944436
Discovery Magnitude 16.6 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 18.0
( TNS 2023hru )

AT 2023hru - 2025-04-12 (T+704.8d)
Image below (2025-04-12.078) was taken 704.8 days after discovery of 2023hru
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 02:01 UT (#1315131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023hru on Transients 2023 Page >>

AT 2023ygv - Transient (non-detection)

AT 2023ygv (Hercules)
AT 2023ygv (Type: unk) discovered 2023-11-20.781 UT by Gaia
Alias: Gaia23dhm
Discovery Magnitude 15.42 (G-Gaia Filter)
vs Prior Non-Detection Limiting Magnitude 21.5
Apparently hostless bright blue transient
( TNS 2023ygv | Gaia23dhm )

AT 2023ygv - 2025-04-12 (T+508.3d)
Image below (2025-04-12.118) was taken 508.3 days after discovery of 2023ygv
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 02:59 UT (#1315157-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023ygv on Transients 2023 Page >>

AT 2024slv - CV Type Transient

AT 2024slv (Aquila)
AT 2024slv (Type: CV) discovered 2024-08-21.771 UT by XOSS
Alias: KATS24Q003, TCP J19203553+1504297
Discovery Magnitude 16.52 (Clear Filter)
( TNS 2024slv )

AT 2024slv - 2025-04-12 (T+233.3d)
Image below (2025-04-12.102) was taken 233.3 days after discovery of 2024slv
Position of earlier transient (very faint) is shown by white cross-hairs
Estimated Magnitude +18.2 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 02:30 UT (#1315145-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024slv on Transients 2024 Page >>

AT 2024xpy - Type BL Transient

AT 2024xpy (Hercules)
AT 2024xpy (Type: BL) discovered 2024-10-04.838 UT by Gaia
Alias: Gaia24cvy
Alerting Magnitude 16.17 (G-Gaia Filter)
vs Historic Magnitude 17.28 +/- 0.29
Brightening in known BL Lac type object (2FGL J1844.3+1548)
Normal Magnitude 17.0 to 18.0
( TNS 2024xpy | Gaia24cvy | Simbad 2FGL J1844.3+1548 )

AT 2024xpy - 2025-04-12 (T+189.2d)
Image below (2025-04-12.038) was taken 189.2 days after discovery of 2024xpy
Position of earlier transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude +16.07 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 01:03 UT (#1315109-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024xpy on Transients 2024 Page >>

AT 2024aasb - Type YSO? Transient

AT 2024aasb (Camelopardalis)
AT 2024aasb (Type: YSO?) discovered 2024-11-03.961 UT by Gaia
Alias: Gaia24dfc
Alerting Magnitude 15.09 (G-Gaia Filter)
vs Historic Magnitude 16.24 +/- 0.41 SD
Historic Range 15.51 to 17.87 (2014-2024)
Brightening in candidate YSO
( TNS 2024aasb | Gaia24dfc )

AT 2024aasb - 2025-04-11 (T+158.9d)
Image below (2025-04-11.888) was taken 158.9 days after discovery of 2024aasb
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude +17.35 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-11 21:28 UT (#1315014-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024aasb - Earlier Image, 2024-12-24 (T+51.0d)
Image below (2024-12-24.993) was taken 51.0 days after discovery of 2024aasb
Position of reported transient (barely visible) is shown by white cross-hairs
Limiting Magnitude +18.3 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-25 00:00 UT (#1287223-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024aasb - Earlier Image, 2024-11-17 (T+14.0d)
Image below (2024-11-17.917) was taken 14.0 days after discovery of 2024aasb
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.51 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-11-17 22:01 UT (#1271073)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024aasb on Transients 2024 Page >>

AT 2025fwb - Type CV? Transient

AT 2025fwb (Lyra)
AT 2025fwb (Type: CV?) discovered 2025-03-26.869 UT by XOSS
Alias: KATS25F035, TCP J19103948+3710117
Discovery Magnitude 15.73 (Clear Filter)
( TNS 2025fwb )

AT 2025fwb - 2025-04-12 (T+16.2d)
Image below (2025-04-12.063) was taken 16.2 days after discovery of 2025fwb
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 01:39 UT (#1315124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2025fwb - Detail , 2025-04-12 (T+16.2d)
Image below (2025-04-12.063) was taken 16.2 days after discovery of 2025fwb
Position of reported transient (very faint) is shown by white cross-hairs
Estimated Magnitude +17.6 (Clear Filter)

Annotated CCD Image (175% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 01:39 UT (#1315124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025fwb on Transients 2025 Page >>

LEDA 1776479 - Galaxy with Type Ia-02cx Supernova 2025gcv

LEDA 1776479 with SN 2025gcv (Bootes)
SN 2025gcv (Type: Ia-02cx) discovered 2025-03-27.536 UT by ATLAS
using ATLAS Haleakala Telescope
Alias: ATLAS25ddn, ZTF25aalocpf
Discovery Magnitude 18.37 (cyan-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.41
( TNS 2025gcv )

LEDA 1776479 with SN 2025gcv - 2025-04-12 (T+15.5d)
Image below (2025-04-12.022) was taken 15.5 days after discovery of 2025gcv
Position of reported supernova (not separately distinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 00:39 UT (#1315102-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025gcv (in LEDA 1776479) on Supernova 2025 Page >>

NGC 2890 - Elliptical Galaxy with Type Ia Supernova 2023xnl (non-detection)

NGC 2890 with SN 2023xnl (Hydra)
SN 2023xnl (Type: Ia) discovered 2023-11-11.478 UT by ZTF
Alias: ZTF23abqfuwf
Discovery Magnitude 18.37 (cyan-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.41
( TNS 2023xnl )

NGC 2890 - Elliptical Galaxy

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-11 21:07 UT (#1315008-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 2890 - Elliptical Galaxy

Annotated CCD Image (150% size, square root scale)
Image details as above

NGC 2890 with SN 2023xnl - 2025-04-11 (T+517.4d)
Image below (2025-04-11.876) was taken 517.4 days after discovery of 2023xnl
Position of earlier supernova (likely faded and no longer visible) 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
2025-04-11 21:07 UT (#1315008-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023xnl (in NGC 2890) on Supernova 2023 Page >>

NGC 3277 - Spiral Galaxy with Type Ib-Ca-rich Supernova 2025coe

NGC 3277 with SN 2025coe (Leo Minor)
SN 2025coe (Type: Ib-Ca-rich) discovered 2025-02-24.634 UT by Koichi Itagaki
using 0.5-m F/6.9 Telescope
Alias: ATLAS25caa, ZTF25aahsvoc
Discovery Magnitude 17.4 (Clear Filter)
SN (z=0.00472) is suspected to be located in NGC 3277 (z=0.004720,
value from NED), but has a large offset.
( TNS 2025coe )

NGC 3277 with SN 2025coe - 2025-04-11 (T+46.3d)
Image below (2025-04-11.961) was taken 46.3 days after discovery of 2025coe
Position of reported supernova (very faint) is shown by white cross-hairs
Estimated Magnitude +18.0 (Clear Filter)

Offset from the centre of NGC 3277 is particularly large and
there is some doubt as whether the SN belongs to NGC 3277 or not

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-11 23:07 UT (#1315067-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3277 with SN 2025coe - Earlier Image, 2025-03-18 (T+22.2d)
Image below (2025-03-18.861) was taken 22.2 days after discovery of 2025coe
Position of reported supernova (faint) is shown by white cross-hairs
Measured Magnitude +17.06 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-18 20:48 UT (#1303005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025coe (in NGC 3277) on Supernova 2025 Page >>

NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

NGC 5957 with SN 2025fvw (Serpens)
SN 2025fvw (Type: Ia) discovered 2025-03-26.799 UT by Koichi Itagaki
using XingLong Telescope
Alias: ZTF25aaktqzg, GOTO25bhh, PS25avu, ATLAS25dcd
Discovery Magnitude 17.4 (Clear Filter)
( TNS 2025fvw )

NGC 5957 with SN 2025fvw - 2025-04-11 (T+16.2d)
Image below (2025-04-11.993) was taken 16.2 days after discovery of 2025fvw
Position of reported supernova (distinct, near peak brightness) is shown by white cross-hairs
Measured Magnitude +13.74 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-11 23:57 UT (#1315083-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2025fvw - Light Curve

Images of SN 2025fvw (in NGC 5957) on Supernova 2025 Page >>

SN 2023nlk - Type Ia Supernova in WISEA Galaxy (non-detection)

SN 2023nlk (Hercules)
Alias: In WISEA J172053.48+221231.2
SN 2023nlk (Type: Ia) discovered 2023-07-18.259 UT by ALeRCE
using Palomar 1.2m Oschin Telescope
Alias: ZTF23aasopeh
Discovery Magnitude 19.97 (g-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 20.28
( TNS 2023nlk )

SN 2023nlk - 2025-04-11 (T+633.6d)
Image below (2025-04-11.907) was taken 633.6 days after discovery of 2023nlk
Position of earlier supernova (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +18.7 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-11 21:55 UT (#1315034-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023nlk on Supernova 2023 Page >>

UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs

UGC 10058 with SN 2025gvs (Corona Borealis)
SN 2025gvs (Type: II) discovered 2025-04-05.502 UT by ATLAS
Alias: ATLAS25dpm
Discovery magnitude 17.59 (cyan-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 17.7
( TNS 2025gvs)

UGC 10058 with SN 2025gvs - 2025-04-11 (T+6.4d)
Image below (2025-04-11.949) was taken 6.4 days after discovery of 2025gvs
Position of reported supernova (distinct, brightening) is shown by white cross-hairs
Measured Magnitude +15.77 (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-11 22:54 UT (#1315061-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025gvs (in UGC 10058) on Supernova 2025 Page >>

UGC 12293 - Spiral Galaxy with Transient AT 2025gyi (non-detection)

UGC 12293 with AT 2025gyi (Pegasus)
AT 2025gyi (Type: unk) discovered 2025-04-07.505 UT by ZTF
using Palomar 1.2m Oschin Telescope
Alias: ZTF25aalvyrp
Discovery magnitude 18.36 (r-ZTF Filter)
( TNS 2025gyi)

UGC 12293 with AT 2025gyi - 2025-04-12 (T+4.6d)
Image below (2025-04-12.150) was taken 4.6 days after discovery of 2025gyi
Position of reported supernova (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.0 (Clear Filter)
Very poor quality image (bright sky background)

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-12 03:39 UT (#1315181-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Original image (T+4.6d)

Annotated CCD Image (70% size, linear scale, cropped)
Image details as above

Images of SN 2025gyi (in UGC 12293) on Supernova 2025 Page >>

This Web Page:	Images - Session 1315 (2025-04-11)
Last Updated :	2025-04-26
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site

David's Astronomy Pages Images - Session 1315 (2025-04-11)

Observing Result