David's Astronomy Pages Images - Session 1372 (2025-11-01)

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Image (S1373)

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Session Notes

29P/Schwassmann-Wachmann - Comet  (non-detection) C/2024 E1 (Wierzchos) - Comet C/2025 K1 (ATLAS) - Comet C/2025 R2 (SWAN) - Comet     AT 2023tsk - Type BL Transient AT 2024advw - Type CV? Transient  (non-detection) AT 2025tes - Type CV? Transient  (non-detection) AT 2025abne - Transient     NGC 3040 - Spiral Galaxy with Type IIb Supernova 2025nkf  (non-detection) NGC 3106 - Spiral Galaxy with Type Ia Supernova 2025aauj     SN 2025taz - Type Ia Supernova in WISEA Galaxy (PGC 166556)     UGC 3458 - Spiral Galaxy with Type II Supernova 2025yao UGC 10809 & PGC 200345  - Galaxy with Type Ic-BL Supernova 2025vaw       - AT2025aaeg & SN 2025aarn attempts failed (due to cloud)     Variable Stars (photometric monitoring) - T CrB, RZ LMi, FU Ori     Nearby Stars (astrometric monitoring) - HH And

- All Night Session (11.3hr), interrupted by cloud on multiple occasions. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 5°C (min) - CCD Temperature:  -20°C - Notes from 2025-11-01 >>     -       -

Observing Result

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29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-11-02 (passing through Leo) Sun Distance 6.30 AU (receeding slowly) Earth Distance 6.89 AU (1031.5 million km) Poor quality image (poor transparency, single frame, not centred)		29P/Schwassmann-Wachmann - 2025-11-02 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 19.3 arcsec/hr, Dec -10.8 arcsec/hr) Position of comet indicated by white circle)
Annotated CCD Image (50% size, square root scale) 90s exposure (single frame), 3x3 binning, Clear Filter 2025-11-02 05:05 UT (#1372150) 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/2024 E1 (Wierzchos) - Comet

C/2024 E1 (Wierzchos) - 2025-11-01 (passing through Hercules) Sun Distance 1.66 AU (approaching) Earth Distance 2.27 AU (339.0 million km)		C/2024 E1 (Wierzchos) - 2025-11-01 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 54.3 arcsec/hr, Dec -73.5 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-11-01 18:48 UT (#1372005-06) 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 C/2024 E1 (Wierzchos) on Comets 2025 Page >>

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C/2025 K1 (ATLAS) - Comet

C/2025 K1 (ATLAS) - 2025-11-02 (passing through Leo) Sun Distance 0.74 AU (receeding) Earth Distance 0.80 AU (118.9 million km)		C/2025 K1 (ATLAS) - 2025-11-02 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -55.8 arcsec/hr, Dec 174.8 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-11-02 05:24 UT (#1372162-63) 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) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-11-02 05:26 UT (#1372162-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
		Annotated CCD Image (175% size, square root scale, cropped) Image details as above
Images of C/2025 K1 (ATLAS) on Comets 2025 Page >>

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C/2025 R2 (SWAN) - Comet

C/2025 R2 (SWAN) - 2025-11-01 (passing through Aquarius) Sun Distance 1.19 AU (receeding) Earth Distance 0.38 AU (56.9 million km)		C/2025 R2 (SWAN) - 2025-11-01 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 341.4 arcsec/hr, Dec 101.5 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 60s exposure (single frame), 3x3 binning, Clear Filter 2025-11-01 22:07 UT (#1372061) 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) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-11-01 22:09 UT (#1372060-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2025 R2 (SWAN) on Comets 2025 Page >>

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AT 2023tsk - Type BL Transient

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AT 2024advw - Type CV? Transient  (non-detection)

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AT 2025tes - Type CV? Transient  (non-detection)

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AT 2025abne - Transient

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NGC 3040 - Spiral Galaxy with Type IIb Supernova 2025nkf

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NGC 3106 - Spiral Galaxy with Type Ia Supernova 2025aauj

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SN 2025taz - Type Ia Supernova in WISEA Galaxy (PGC 166556)

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UGC 3458 - Spiral Galaxy with Type II Supernova 2025yao

UGC 3458 with SN 2025yao (Camelopardalis) SN 2025yao (Type: II) discovered 2025-09-20.446 UT by ZTF using Palomar 1.2m Oschin Telescope Alias: ZTF25absindv Discovery Magnitude 18.37 (r-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 20.32  ( TNS 2025yao )

UGC 3458 with SN 2025yao - 2025-11-01 (T+42.5d) Image below (2025-11-01.967) was taken 42.5 days after discovery of 2025yao Position of reported supernova (faint & fading) is shown by white cross-hairs Measured Magnitude +16.87 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-11-01 23:15 UT (#1372078-79) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 3458 with SN 2025yao - Earlier Image, 2025-10-21 (T+30.7d) Image below (2025-10-21.172) was taken 30.7 days after discovery of 2025yao Position of reported supernova (faint) is shown by white cross-hairs Measured Magnitude +16.39 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-10-21 04:10 UT (#1369047-48) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025yao (in UGC 3458) on Supernova 2025 Page >>

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UGC 10809 & PGC 200345  - Galaxy with Type Ic-BL Supernova 2025vaw

UGC 10809 with SN 2025vaw (Hercules) AT 2025vaw (Type: unk) discovered 2025-08-22.925 UT by ATLAS using  ATLAS Teide Tenerife Telescope Alias: ATLAS25kew, ZTF25abkwytp Discovery magnitude 16.90 (wide-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 20.19  ( TNS 2025vaw)

UGC 10809 with SN 2025vaw - 2025-11-01 (T+70.9d) Image below (2025-11-01.873) was taken 70.9 days after discovery of 2025vaw Position of reported supernova (not visible / not distinuishable) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.5 - 18.5 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-11-01 21:05 UT (#1372029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 10809 & PGC 200345 with SN 2025vaw - Earlier Image, 2025-08-26 (T+4.0d) Image below (2025-08-26.934) was taken 4.0 days after discovery of 2025vaw Position of reported supernova (faint, but not fully separated from nucleus ) is shown by white cross-hairs Supernova appears to be associated with PGC 200345  (catalog mag +16.8) rather than with UGC 10058 Measured Magnitude +15.49 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 22:33 UT (#1352029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025vaw (in UGC 10809 / PGC 200345) on Supernova 2025 Page >>

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