David's Astronomy Pages Images - Session 1308 (2025-04-01)

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Session Notes

29P/Schwassmann-Wachmann - Comet C/2022 E2 (ATLAS) - Comet C/2023 A3 (Tsuchinshan-ATLAS) - Comet     AT 2022rew - CV Type Transient, V1081 Cyg AT 2024sje - Type YSO Transient  (near B33) AT 2024aecu - Transient  (non-detection) AT 2025il - CV Type Transient, RU Peg AT 2025euu - Type CV? Transient AT 2025ghv - Type CV? Transient     ARK 479 - Galaxy with Type Ia Supernova 2024agly ARP 47 - Spiral Galaxy with LSB Companion (MCG+3-38-14) CGCG 227-024 - Galaxy with Type Ia-91T Supernova 2024enu (non-detection)     NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw NGC 6004 - Spiral Galaxy with Type II Supernova 2024cld     SN 2024aeey - Type Ia Supernova     UGC 604 - Spiral Galaxy with Type II Supernova 2024advj UGC 5695 - Spiral Galaxy with Type II Supernova 2025cfc     Variable Stars (photometric monitoring)   - T CrB, SS Cyg, SS Her, RZ LMi, BL Lac, RR Lyr     Nearby Stars (astrometric monitoring) - HH And, Groombridge 34

- All-Night Session (7.5 hr)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 6°C (min) - CCD Temperature: -15°/-20°C - Notes from 2025-04-01 >>     - Aurora Images from 2025-04-01 / 2025-04-02  >>

Observing Result

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29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-04-02 (passing through Leo) Sun Distance 6.27 AU (turning ?) Earth Distance 5.57 AU (833.3 million km)		29P/Schwassmann-Wachmann - 2025-04-02 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -7.43 arcsec/hr, Dec 1.90 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 9 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-04-02 01:00 UT (#1308100-08) 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
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 >>

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C/2022 E2 (ATLAS) - Comet

C/2022 E2 (ATLAS) - 2025-04-01 (passing through Andromeda) Sun Distance 4.07 AU (receeding) Earth Distance 4.73 AU (707.1 million km)		C/2022 E2 (ATLAS) - 2025-04-01 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 14.01 arcsec/hr, Dec -2.52 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 4 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 21:02 UT (#1308007-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) Image details as left
Images of C/2022 E2 (ATLAS) on Comets 2023 Page >>
Images of C/2022 E2 (ATLAS) on Comets 2024 Page >>
Images of C/2022 E2 (ATLAS) on Comets 2025 Page >>

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2025-04-02 (passing through Delphinus) Sun Distance 3.24 AU (receeding) Earth Distance 3.54 AU (530.1 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2025-04-02 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -3.96 arcsec/hr, Dec 26.73 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 9 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-04-02 02:18 UT (#1308160-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) 9 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-04-02 02:18 UT (#1308160-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2025 Page >>

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AT 2022rew - CV Type Transient, V1081 Cyg

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AT 2024sje - Type YSO Transient  (near B33)

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AT 2024aecu - Transient  (non-detection)

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AT 2025il - CV Type Transient, RU Peg

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AT 2025euu - Type CV? Transient

AT 2025euu (Perseus) AT 2025euu (Type: CV?) discovered 2025-03-19.629 UT by XOSS Alias: KATS25F011, TCP J03453451+4157182 Discovery Magnitude 13.84 (Clear Filter)  ( TNS 2025euu )

AT 2025euu - 2025-04-02 (T+13.4d) Image below (2025-04-02.019) was taken 13.4 days after discovery of 2025euu Position of reported transient (barely separable) is shown by white cross-hairs

Annotated CCD Image (200% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-02 00:36 UT (#1308092-96) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025euu on Transients 2025 Page >>

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AT 2025ghv - Type CV? Transient

AT 2025ghv (Gemini) AT 2025ghv (Type: CV?) discovered 2025-03-31.589 UT by XOSS Alias: PSP25H, TCP J06455595+1210577 Discovery Magnitude 14.88 (Clear Filter)  ( TNS 2025ghv )

AT 2025ghv - 2025-04-01 (T+1.3d) Image below (2025-04-01.899) was taken 1.3 days after discovery of 2025ghv Position of reported transient (faint) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 21:42 UT (#1308022-25) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2025ghv - Detail, 2025-04-01 (T+1.3d) Image below (2025-04-01.899) was taken 1.3 days after discovery of 2025ghv Position of reported transient (faint) is shown by white cross-hairs Estimated Magnitude +16.0 (Clear Filter)

Annotated CCD Image (175% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 21:42 UT (#1308022-25) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025ghv on Transients 2025 Page >>

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ARK 479 - Galaxy with Type Ia Supernova 2024agly

ARK 479 with SN 2024agly (Serpens) SN 2024agly (Type: Ia) discovered 2024-12-31.530 UT by ZTF using Palomar 1.2m Oschin Telescope Alias: ZTF24acahvpc Discovery Magnitude 16.93 (r-ZTF Filter) Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot  ( TNS 2024agly )

ARK 479 - Galaxy ARK 479 (alias PGC 55550, catalog mag +14.6) Seyfert 2 Galaxy  HWD 1533+14 Member of Arakelian Catalog  ("The galaxies of high surface brightness").

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 22:28 UT (#1308038-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

ARK 479 with SN 2024agly - 2025-04-01 (T+91.4d) Image below (2025-04-01.930) was taken 91.4 days after discovery of 2024agly Position of reported SN (not separately distinguishable, likely faded) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 22:28 UT (#1308038-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024agly (in ARK 479) on Supernova 2024 Page >>

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ARP 47 - Spiral Galaxy with LSB Companion on arm (MCG+3-38-14)

ARP 47 (Bootes) Alias: MCG+3-38-14 / CGCG 105-026 / PGC 52803 [ ARP Galaxies ]		Challenge to see tiny companion at end of hooked arm to East of MCG+3-38-14
Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 22:05 UT (#1308031-34) 12" LX200R  (at f/9.7) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (150% size, square root scale, cropped) Image details as left

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CGCG 227-024 - Galaxy with Type Ia-91T Supernova 2024enu  (non-detection)

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NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

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NGC 6004 - Spiral Galaxy with Type II Supernova 2024cld

NGC 6004 with SN 2024cld (Serpens) SN 2024cld (Type: II) discovered 2024-02-13.228 UT by GOTO Alias: GOTO24ql, ATLAS24clv Discovery Magnitude 17.97 ( Clear Filter) Spectrum contains clear narrow H Balmer and He II 4686A flash ionisation features typically seen in young type II SNe  ( TNS 2024cld )

NGC 6004 with SN 2024cld - 2025-04-01 (T+413.7d) Image below (2025-04-01.944) was taken 413.7 days after discovery of 2024cld Position of earlier SN (very faint ?) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 22:48 UT (#1308046-50) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6004 with SN 2024cld - Earlier Image, 2024-02-21 (T+7.9d) Image below (2024-02-21.094) was taken 7.9 days after discovery of 2024cld Position of reported SN (distinct, & brightening ?) is indicated by white cross-hairs. Measured Magnitude +15.14 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-02-21 02:18 UT (#1187159-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024cld (in NGC 6004) on Supernova 2024 Page >>

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SN 2024aeey - Type Ia Supernova

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UGC 604 - Spiral Galaxy with Type II Supernova 2024advj

UGC 604 with SN 2024advj (Andromeda) SN 2024advj (Type: II) discovered 2024-12-11.191 UT by ATLAS Alias: ATLAS24riq, ZTF24abxpkhb, Gaia24dqw Discovery Magnitude 17.87 (g-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 20.20 Confirmed SN II  (Gaia) Gaia, 2024-12-13 13:08, mag 16.63  ( TNS 2024advj | Gaia24dqw )

UGC 604 with SN 2024advj - 2025-04-02 (T+112.0d) Image below (2025-04-02.153) was taken 112.0 days after discovery of 2024advjj Position of earlier SN (very faint, barely visible) 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 2025-04-02 03:49 UT (#1308220-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 604 with SN 2024advj - Earlier Image 2024-12-24 (T+13.8d) Image below (2024-12-24.979) was taken 13.8 days after discovery of 2024advj Position of earlier SN (faint, but distinct) is shown by white cross-hairs Measured Magnitude +15.55 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-24 23:37 UT (#1287215-18) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024advj (in UGC 604) on Supernova 2024 Page >>

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UGC 5695 - Spiral Galaxy with Type II Supernova 2025cfc

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