David's Astronomy Pages Images - Session 1302 (2025-03-17)

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Images (S1303)

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Session Notes

19P/Borrelly - Comet  (non-detection) C/2021 X1 (Maury-Attard) - Comet  (non-detection) C/2023 A3 (Tsuchinshan-ATLAS) - Comet     AT 2022acqx - Transient AT 2023osr - CV Type Transient  (non-detection) AT 2024re - CV Type Transient AT 2024wzq - CV Type Transient AT 2025la - Transient  (non-detection) AT 2025lr - Afterglow Type Transient  (non-detection)     2MFGC 13744 - Galaxy with Type II Supernova 2024afyu IC 4479 - Spiral Galaxy with Type Ia Supernova 2024afpi     NGC 3521 - Spiral Galaxy with Type Ic Supernova 2024aecx  (non-detection)     SN 2024aeey - Type Ia Supernova     UGC 5695 - Spiral Galaxy with Type II Supernova 2025cfc UGC 10913 - Spiral Galaxy with Transient AT 2025hy     - Comet 49P/Arend-Rigaux, AT2024gfk, NGC 2642 w/SN2023aaby, NGC 2986 w/SN2025gj, NGC 3200 & UGCA 167 attempts failed (due to bad guiding)         Variable Stars (photometric monitoring) - BL Lac, T CrB     - RZ LMi attempt failed (due to bad guiding)     Nearby Stars (astrometric monitoring) - HH And, Barnards Star     - Teegardens Star attempt failed (due to bad guiding)

- Attempted night session (9.3h),. Images froms first 9 targets  rejected due to Foc2 Focusing Issue and consequential bad guiding     - 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 2025-03-17 >>     - Aurora Images from 2025-03-17  >> -

Observing Result

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19P/Borrelly - Comet (non-detection)

19P/Borrelly - 2025-03-18 (passing through Ophiuchus) Sun Distance 5.88 AU (receeding) Earth Distance 5.54 AU (829.2 million km) Expected position of comet (not visible) is shown by white circle		19P/Borrelly - 2025-03-18, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -0.98 arcsec/hr, Dec -0.24 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 9 x 45s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 04:49 UT (#1302239-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 9 x 45s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 04:49 UT (#1302239-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 19P/Borrelly on Comets 2022 Page >>
Images of 19P/Borrelly on Comets 2025 Page >>

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C/2021 X1 (Maury-Attard) - Comet (non-detection)

C/2021 X1 (Maury-Attard) - 2025-03-18 (passing through Delphinus) Sun Distance 6.63 AU (receeding) Earth Distance 7.23 AU (1081.4 million km) Expected position of comet (not visible) is shown by white circle		C/2021 X1 (Maury-Attard) - 2025-03-18 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 4.62 arcsec/hr, Dec 12.37 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 03:56 UT (#1302215-17) 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) 7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 04:00 UT (#1302215-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2021 X1 (Maury-Attard) on Comets 2023 Page >>
Images of C/2021 X1 (Maury-Attard) on Comets 2025 Page >>

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-18 (passing through Delphinus) Sun Distance 3.05 AU (receeding) Earth Distance 3.54 AU (529.2 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-18 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 5.30 arcsec/hr, Dec 25.48 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 03:32 UT (#1302198-200) 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) 3 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 03:32 UT (#1302198-200) 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 2022acqx - Transient

AT 2022acqx (Pegasus) AT 2022acqx (Type: unk) discovered 2022-12-10.501 UT by MASTER Alias: MASTER OT J221424.76+223053.4 Discovery Magnitude 15.1 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 18.6 [ TNS 2022acqx ]

AT 2022acqx - 2025-03-18 (T+828.7d) Image below (2025-03-18.174) was taken 828.7 days after discovery of 2022acqx Positon of earlier transient (distinct) is shown by white cross hairs.   Measured magnitude +14.56 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 04:20 UT (#1302224-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022acqx on Transients 2022 Page >>

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

AT 2023osr (Hercules) AT 2023osr (Type: CV) discovered 2023-08-07.391 UT by ATLAS Alias: ATLAS23qkt Discovery Magnitude 16.89 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.34 [ TNS 2023osr ]

AT 2023osr - 2025-03-18 (T+588.7d) Image below (2025-03-18.095) was taken 588.7 days after discovery of 2023osr Positon of earlier transient (not visible) is shown by white cross hairs.   Non-Detection Limiting Magnitude +14.56 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 02:26 UT (#1302151-55) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023osr on Transients 2023 Page >>

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AT 2024re - CV Type Transient

AT 2024re (Lyra) AT 2024re (Type: CV) discovered 2024-01-05.585 UT by Gaia Alias: Gaia24aeg Discovery Magnitude 16.21 (G-Gaia Filter) vs Historic Magnitude 17.70 +/- 0.62 SD Candidate CV in 2mag outburst [ TNS 2024re | Gaia24aeg ]

AT 2024re - 2025-03-18 (T+437.5d) Image below (2025-03-18.117) was taken 437.5 days after discovery of 2024re Positon of earlier transient (very faint/barely visible) is shown by white cross hairs.   Measured Magnitude +18.40 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 02:51 UT (#1302175-79) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024re on Transients 2024  Page >>

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AT 2024wzq - CV Type Transient

AT 2024wzq (Serpens) AT 2024wzq (Type: CV) discovered 2024-09-28.573 UT by Gaia Alias: Gaia24csr Discovery Magnitude 13.97 (G-Gaia Filter) vs Historic Magnitude 14.75 +/- 0.26 SD 0.7 mag brightening in Gaia and WISE source [ TNS 2024wzq | Gaia24csr ]

AT 2024wzq - 2025-03-18 (T+170.6d) Image below (2025-03-18.190) was taken 170.6 days after discovery of 2024wzq Positon of earlier transient (very faint/barely visible) is shown by white cross hairs.   Measured Magnitude +14.27 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 04:37 UT (#1302232-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024wzq on Transients 2024  Page >>

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AT 2025la - Transient  (non-detection)

AT 2025la (Cygnus) AT 2025la (Type: unk) discovered 2025-01-11.109 UT by Gaia Alias: Gaia25acy Discovery Magnitude 16.89 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.34 [ TNS 2025la | Gaia25acy ]

AT 2025la - 2025-03-18 (T+66.0d) Image below (2025-03-18.125) was taken 66.0 days after discovery of 2025la Positon 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) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 03:08 UT (#1302182-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025la on Transients 2025 Page >>

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AT 2025lr - Afterglow Type Transient  (non-detection)

AT 2025lr (Crater) AT 2025lr (Type: Afterglow) discovered 2025-01-14.316 UT by MASTER Alias: MASTER OT J110618.40-150641.1, GRB 250114A Discovery Magnitude 15.9 (? Filter) vs Prior Non-Detection Limiting Magnitude 19.7 Remarks: GRB 250114A optical counterpart [ TNS 2025lr ]

AT 2025lr - 2025-03-17 (T+62.7d) Image below (2025-03-17.995) was taken 62.7 days after discovery of 2025lr Positon of reported transient (faded & no longer visible) is shown by white circle Non-Detection Limiting Magnitude +18.5 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-17 23:56 UT (#1302100-01) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025lr on Transients 2025 Page >>

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2MFGC 13744 - Galaxy with Type II Supernova 2024afyu

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IC 4479 - Spiral Galaxy with Type Ia Supernova 2024afpi

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NGC 3521 - Spiral Galaxy with Type Ic Supernova 2024aecx  (non-detection)

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SN 2024aeey - Type Ia Supernova

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UGC 5695 - Spiral Galaxy with Type II Supernova 2025cfc

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UGC 10913 - Spiral Galaxy with Transient AT 2025hy

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