David's Astronomy Pages Images - Session 1304 (2025-03-19)

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Images (S1305)

Objects

Session Notes

29P/Schwassmann-Wachmann - Comet C/2023 A3 (Tsuchinshan-ATLAS) - Comet     AT 2022acje - Transient  (non-detection) AT 2024gfh - Transient (non-detection) AT 2024wys - CV Type Transient AT 2025esv - Type CV? Transient     LEDA 924001 - Galaxy     NGC 3660 - Spiral Galaxy (UGCA 234) NGC 3981 - Spiral Galaxy (UGCA 255) NGC 4027 - Spiral Galaxy (UGCA 260, ARP 22, H II-296) NGC 5044 - Elliptical Galaxy (UGCA 341)     SN 2024adhf - Type Ia Supernova     UGCA 153 - Spiral Galaxy (PGC 25983)  (non-detection) UGCA 185 - Spiral Galaxy (PGC 28373) UGCA 221 - Spiral Galaxy (PGC 32550) UGCA 221 - Spiral Galaxy (PGC 32550) UGCA 254 - Spiral Galaxy (PGC 37373) UGCA 258 - Irregular Galaxy with Type II Supernova 2022mm     Variable Stars (photometric monitoring) - T CrB, YZ Cnc, SS Cyg, U Her, BL Lac, U Mon, NV Ori, ER UMa         Nearby Stars (astrometric monitoring) - Scholz's Star

- All night session (9.1 hr).     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -1°C (min) - CCD Temperature: -20°/-25°C - Notes from 2025-03-19 >>     - Aurora Images from 2025-03-19  >>

Observing Result

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29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-03-19 (passing through Leo) Sun Distance 6.27 AU (turning) Earth Distance 5.43 AU (812.1 million km)		29P/Schwassmann-Wachmann - 2025-03-19 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -11.91 arcsec/hr, Dec 3.14 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 21:19 UT (#1304055-57) 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) 9 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 21:25 UT (#1304055-63) 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 >>

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-20 (passing through Delphinus) Sun Distance 3.08 AU (receeding) Earth Distance 3.54 AU (529.6 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-20 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 4.17 arcsec/hr, Dec 25.70 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 10 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 03:39 UT (#1304201-10) 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/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2025 Page >>

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AT 2022acje - Transient  (non-detection)

AT 2022acje (Lyra) AT 2022acje (Type: unk) discovered 2022-12-04.208 UT by ATLAS using ATLAS Haleakala Telescope Alias: ATLAS22bnmc Discovery Magnitude 16.72 (orange-ATLAS Filter) vsPrior Non-Detection Limiting Magnitude  19.46  ( TNS 2022acje )

AT 2022acje - 2025-03-20 (T+836.9d) Image below (2025-03-20.118) was taken 836.9 days after discovery of 2022acje Position of earlier transient (very faint) is shown by white cross-hairs Measured Magnitude +17.04 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 02:56 UT (#1304187-89) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022acje on Transients 2022 Page >>

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AT 2024gfh - Transient (Non-Detection)

AT 2024gfh (Cygnus) AT 2024gfh (Type: unk) discovered 2024-04-10.362 UT by GEOTS Alias: GEOTS-Balaji-2024-004, TCP J19445510+3846155 Discovery magnitude 16.5 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 18.0  ( TNS 2024gfh )

AT 2024gfh - 2025-03-20 (T+343.8d) Image below (2025-03-20.134) was taken 343.8 days after discovery of 2024gfh Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 03:21 UT (#1304194-98) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024gfh on Transients 2024 Page >>

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AT 2024wys - CV Type Transient

AT 2024wys (Sagittarius) AT 2024wys (Type: CV) discovered 2024-09-26.821 UT by Gaia Alias: Gaia24csp Alerting magnitude 16.26 (G-Gaia Filter) vs Historic Magnitude 14.70 +/- 0.23 SD 1.6 mag dimming in erratic red source  ( TNS 2024wys | Gaia24csp )

AT 2024wys - 2025-03-20 (T+174.4d) Image below (2025-03-20.195) was taken 174.4 days after discovery of 2024wys Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +14.98 (Clear Filter) Star appears to be lying in its normal range (mag 14.3 - 15.4 G-Gaia Filter, Gaia)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 04:43 UT (#1304238-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024wys on Transients 2024 Page >>

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AT 2025esv - Type CV? Transient

AT 2025esv (Cygnus) AT 2025esv (Type: CV?) discovered 2025-03-17.910 UT by XOSS Alias: KATS25F002, TCP J19584776+4119174 Discovery Magnitude 16.93 (Clear Filter)  ( TNS 2025esv )

AT 2025esv - 2025-03-20 (T+2.2d) Image below (2025-03-20.077) was taken 2.2 days after discovery of 2025esv Position of reported transient (very faint) is shown by white cross-hairs Measured Magnitude +17.04 (Clear Filter)

Annotated CCD Image (175% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 02:00 UT (#1304153-57) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025esv on Transients 2025 Page >>

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LEDA 924001 - Galaxy

LEDA 924001 (Crater) Alias  PGC 924001 (catalog mag +16.8) with several other galaxies in same FOV  PGC 924613 (catalog mag +16.2),   PGC 923364 (catalog mag +16.5),  PGC 923588 (catalog mag +17.0),  PGC 924751 (catalog mag +17.6), PGC 3081810 (catalog mag ?)

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 00:08 UT (#1304115-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

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NGC 3660 - Spiral Galaxy (UGCA 234)

NGC 3660 (Crater) Alias: UGCA 234 (catalog mag +12.2 or +12.8) [ UGCA Galaxies ]  with two other smaller galaxies in same FOV PGC 1000714 (catalog mag +16.3),   PGC 3081853 (catalog mag ?)

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 22:51 UT (#1304088-92) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3660 / UGCA 234 - Detail

Annotated CCD Image (125% size, square root scale cropped) Image details as above

Negative CCD Image (125% size, square root scale cropped) Image details as above

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NGC 3981 - Spiral Galaxy (UGCA 255)

NGC 3981 (Crater) Alias: UGCA 255 (catalog mag +11.0 or +12.5)  [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 7 x 120s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 00:30 UT (#1304122-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3981 - Detail

Annotated CCD Image (125% size, square root scale, cropped) Image details as above

Negative CCD Image (125% size, square root scale, cropped) Image details as above

NGC 3981 - Later Image (2025-04-04)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-04 00:17 UT (#1310085-89) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 4027 - Spiral Galaxy (UGCA 260, ARP 22, Herschel II-296)

NGC 4027 (Corvus) Alias: UGCA 260, ARP 22, Herschel II-296 Catalog mag +11.0 or +11.7. First imaged in S416  [ UGCA Galaxies ] [ ARP Galaxies ]  [ Herschel 400 Objects ] Taken at altitude 13.1°

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 00:50 UT (#1304131-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4027 / UGCA 260 - Detail

Annotated CCD Image (125% size, square root scale, cropped) Image details as above

Negative CCD Image (125% size, square root scale, cropped) Image details as above

NGC 4027 - Earlier Image (Mar 2010) (Altitude 10 deg)

CCD Image  (33% size) 5 x 120s exposure (average combine), 2x2 binning, C filter 2010-03-09 23:19h UT (#416336-40) 12" LX200R  (at f/9.7) + ST-10XME

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NGC 5044 - Elliptical Galaxy (UGCA 341)

NGC 5044 (Virgo) Alias: UGCA 341(catalog mag +10.8 or +11.8)  [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 00:50 UT (#1304131-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5044 - Detail

Annotated CCD Image (125% size, square root scale, cropped) Image details as above

Negative CCD Image (125% size, log scale, cropped) Image details as above

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SN 2024adhf - Type Ia Supernova

SN 2024adhf (Crater) Alias: In WISEA J113009.86-134449.7 SN 2024adhf (Type: Ia) discovered 2024-12-01.269 UT by GOTO Alias: GOTO24iqy, ZTF24abuvknk, Gaia25aao Discovery Magnitude 14.9 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 18.9 Confirmed SN Ia Gaia, 2024-12-04 09:47, mag 14.08 Gaia, 2025-01-01 11:19, mag 14.45  ( TNS 2024acnr | Gaia25aao )

SN 2024adhf - 2025-03-20 (T+108.8d) Image below (2025-03-20.059) was taken 108.8 days after discovery of 2024adhf Position of reported supernova (very faint) is shown by white cross-hairs Adjacent object is GSC 5515:838 (UCAC2 26890101) as possible star, but this also corresponds to catalog location of WISEA J113009.86-134449.7 (a galaxy)

Annotated CCD Image (250% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-20 01:34 UT (#1304145-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2024adhf - Earlier Image, 2024-12-13 (T+12.0d) Image below (2024-12-13.235) was taken 12.0 days after discovery of 2024adhf Position of reported supernova (distinct) is shown by white cross-hairs Adjacent object is GSC 5515:838 (UCAC2 26890101) as possible star, but this also corresponds to catalog location of WISEA J113009.86-134449.7 (a galaxy)

Annotated CCD Image (250% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 05:45 UT (#1282124-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2024adhf - Reference Image PanSTARRS image shows presence of a faint spiral galaxy at location of SN 2024adhf Unclear if SN is associated with this faint galaxy or with galaxy  WISEA J113009.86-134449.7 (sitting at same position as GSC 5515:838)

PanSTARRS DR1 Color image displayed & captured in Aladin

Images of SN 2024adhf on Supernova 2024 Page >>

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UGCA 153 - Spiral Galaxy (PGC 25983)   (non-detection)

UGCA 153 (Hydra) Alias: PGC 25983 (catalog mag +15.0)  [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 21:05 UT (#1304049-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 153 - Detail Position of UGCA (not visible) is shown by white circle Poor quality image / uneven sky background / uneven transparency Reschedule target for a later session.

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

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UGCA 185 - Spiral Galaxy (PGC 28373)

UGCA 185 (Hydra) Alias: PGC 28373 (catalog mag +13.6)  [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 21:48 UT (#1304067-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 185 - Detail

Annotated CCD Image (125% size, square root scale, cropped) Image details as above

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UGCA 221 - Spiral Galaxy (PGC 32550)

UGCA 221 (Hydra) Alias: PGC 32550 (catalog mag +13.9)  [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 22:10 UT (#1304075-78) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 221 - Detail

Annotated CCD Image (125% size, square root scale, cropped) Image details as above

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UGCA 254 - Spiral Galaxy (PGC 37373)

UGCA 254 (Crater) Alias: PGC 37373 (catalog mag +13.9)  [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 23:23 UT (#1304101-05) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 254 - Detail

Annotated CCD Image (1Annotated CCD Image (150% size, square root scale, cropped) Image details as above

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UGCA 258 - Irregular Galaxy (PGC 37680) with Type II Supernova 2022mm

UGCA 258  (Corvus) [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 23:43 UT (#1304108-12) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 258 - Detail

CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 23:43 UT (#1304108-12) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 258 - Earlier Image (Mar 2023) UGCA 258 with SN 2022mm - 2022-03-05 (T+52.4d) Image below (2022-03-05.020) was taken 52.4 days after discovery of 2022mm Position of SN (faint) is shown by white cross-hairs

CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-03-05 00:38 UT (#981020-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2022mm (UGCA 258) on Supernovae 2022 Page >>

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