David's Astronomy - Images 2024-12-20 (S1286)

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Images - Session 1286 (2024-12-20)

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Objects Session Notes

C/2023 A3 (Tsuchinshan-ATLAS) - Comet

AT 2022ymv - Type ulens? Transient

AT 2024vid - Type MP Transient (non-detection)

AT 2024zys - CV Type Transient

AT 2024accj - Type AGN Transient

IC 1953 - Spiral Galaxy (UGCA 78)

MRK 0628 - Galaxy with Type Ia Supernova 2024aakr

UGCA 15 - Irregular Galaxy (PGC 2902)

UGCA 22 - Spiral Galaxy (PGC 7324)

- UGCA 90 attempt failed (due to cloud)

Variable Stars (photometric monitoring)

- SS Cyg, BL Lac

Nearby Stars (astrometric monitoring)

- None

- Evening Session (4.3 hr). Session ended when cloud arrived ahead of forecast storm.

- 12" LX200 + ST-10XME for imaging

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

- Ambient Temperature: 3.5°C (min)

- CCD Temperature: -20°C

- Notes from 2024-12-20 >>

-

Observing Result

C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-20 (passing through Aquila) Sun Distance 1.80 AU (receeding) Earth Distance 2.48 AU (371.7 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-20 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 38.46 arcsec/hr, Dec 9.85 arcsec/hr)

Annotated CCD Image (50% size, log scale) 2 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-20 18:44 UT (#1286005-07) 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) 8 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-20 18:47 UT (#1286005-14) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-20		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-20

False Color CCD Image (50% size, log scale) 8 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-20 18:47 UT (#1286005-14) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		False Color CCD Image (100% size, log scale, cropped) Image details as left

Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>

AT 2022ymv - Type ulens? Transient

AT 2022ymv (Lacerta)
AT 2022ymv (Type: ulens?) discovered 2022-10-09.101 UT by Gaia
Alias: Gaia22egq
Discovery Magnitude 15.92 (G-Gaia Filter)
vs Historic magnitude 16.18 +/- 0.08 SD
Bright gal.plane source candidate microlensing event
or Be-type outburst rises by 0.3 mag
( TNS 2022ymv | Gaia22egq)

AT 2022ymv - 2024-12-20 (T+803.7d)
Image below (2024-12-20.789) was taken 803.7 days after discovery of 2022ymv
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured magnitude +15.16 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-20 19:05 UT (#1286017-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022ymv on Transients 2022 Page >>

AT 2024vid - Type MP Transient (non-detection)

AT 2024vid (Pegasus)
AT 2024vid (Type: MP) discovered 2024-09-07.618 UT by MASTER
Alias: MASTER OT J234150.01+092114.9, (137
Discovery Magnitude 11.5 (Clear Filter)
( TNS 2024vid )

AT 2024vid - 2024-12-20 (T+104.3d)
Image below (2024-12-20.902) was taken 104.3 days after discovery of 2024vid
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.5 (Clear Filter)
Poor quality image (single frame)

Annotated CCD Image (100% size, linear scale, cropped)
120s exposure (single frame), 3x3 binning, Clear Filter
2024-12-20 21:39 UT (#1286083)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024vid - Earlier Image, 2024-09-15 (T+8.3d)
Image below (2024-09-15.941) was taken 8.3 days after discovery of 2024vid
Position of reported transient (ambiguous) is shown by white cross-hairs
It is presumed that the reported transient is the star lying close to cross-hairs
Measured magnitude (visible star) +16.35 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-09-15 22:38 UT (#1244091-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024vid on Transients 2024 Page >>

AT 2024zys - CV Type Transient

AT 2024zys (Camelopardalis)
AT 2024zys (Type: CV) discovered 2024-10-28.883 UT by Gaia
Alias: Gaia24dde
Alerting Magnitude 11.23 (G-Gaia Filter)
vs Historic Magnitude 11.44 +/- 0.04 SD
Bright gal.plane source rises by 0.2 mag
( TNS 2024zys | Gaia24dde )

AT 2024zys - 2024-12-20 (T+52.9d)
Image below (2024-12-20.827) was taken 52.9 days after discovery of 2024zys
Position of reported transient (distinct, stable ?) is shown by white cross-hairs
Measured Magnitude +11.70 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-12-20 19:53 UT (#1286042-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024zys - Earlier Image, 2024-11-03 (T+5.2d)
Image below (2024-11-03.117) was taken 5.2 days after discovery of 2024zys
Position of reported transient (fading ?) is shown by white cross-hairs
Measured Magnitude +11.68 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-11-03 02:52 UT (#1261075-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024zys on Transients 2024 Page >>

AT 2024accj - Type AGN Transient

AT 2024accj (Leo)
Alias: In WISEA J093139.04+320400.1
AT 2024accj (Type: AGN) discovered 2024-11-21.656 UT by Gaia
Alias: Gaia24dkm
Alerting Magnitude 16.86 (G-Gaia Filter)
vs Historic Magnitude 17.73 +/- 0.29 SD
Long-term brightening in known Seyfert 1 galaxy
Object has brightened from mag 18.5 in 2024-2015
to mag 16.9 in 2024
( TNS 2024accj | Gaia24dkm )

AT 2024accj - 2024-12-20 (T+29.2d)
Image below (2024-12-20.888) was taken 29.2 days after discovery of 2024accj
Position of earlier transient (faint, fading ?) is shown by white cross-hairs
Measured Magnitude +16.39 (Clear Filter)
Poor quality image (poor sky transparency, single frame)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-12-20 21:18 UT (#1286076)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024accj on Transients 2024 Page >>

IC 1953 - Spiral Galaxy (UGCA 78)

IC 1953 (Eridanus)
Alias: UGCA 78, PGC 13184 (catalog mag +12.7 or +11.6)
[ UGCA Galaxies ]

IC 1953 / UGCA 78 - Spiral Galaxy
Other galaxies in FOV are
PGC 13172 (catalog mag +14.9), PGC 13194 (catalog mag +15.1
Poor quality image (poor seeing/poor sky transparency)

Annotated CCD Image (50% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-20 20:22 UT (#1286054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 1953 / UGCA 78 - Detail

Annotated CCD Image (100% size, square root scale, cropped)
Image details above

IC 1953 - Earlier Image, 2024-11-06
Poor quality image (poor sky conditions / bad guiding)

Annotated CCD Image (50% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-11-06 01:25 UT (#1262131-33)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

MRK 0628 - Galaxy with Type Ia Supernova 2024aakr

MRK 0628 with SN 2024aakr (Cancer)
SN 2024aakr (Type: Ia) discovered 2024-11-01.428 UT by ZTF
Alias: ZTF18aclkbxr
Discovery Magnitude 16.3 ( Clear Filter)
( TNS 2024aakr )

MRK 0628 with SN 2024aakr - 2024-12-20 (T+49.4d)
Image below (2024-12-20.874) was taken 49.4 days after discovery of 2024aakr
Position of reported SN (not separately distinguishable, fading ?) is indicated by white cross-hairs.
Measured Magnitude +15.09 (Clear Filter), Nucleus + SN
(vs PGC 24859 catalog mag +16.0)

Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-20 21:04 UT (#1286070-73)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024aakr (in MRK 0628) on Supernova 2024 Page >>

UGCA 15 - Irregular Galaxy (PGC 2902)

UGCA 15 (Cetus)
Alias: PGC 2902 (catalog mag +15.2)
[ UGCA Galaxies ]

UGCA 15 is just about visible in detailed image below, but barely so
Poor quality image - Reschedule for a future session

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-20 19:36 UT (#1286035-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 15 - Earlier Image, 2024-11-27
UGCA 15 is just about visible in detailed image below, but barely so

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-11-27 20:29 UT (#1277044-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 22 - Spiral Galaxy (PGC 7324)

UGCA 22 (Cetus)
Alias: PGC 7324 (catalog mag +14.5)
[ UGCA Galaxies ]

UGCA 22 - Detail

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-20 20:39 UT (#1286062-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

This Web Page:	Images - Session 1286 (2024-12-20)
Last Updated :	2025-06-26
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site

David's Astronomy Pages Images - Session 1286 (2024-12-20)