David's Astronomy Pages (Solar System) Comets - 2025

Comets 2024

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Comets 2025

Comets Images (2025)	Notes
19P/Borrelly Mar 2025 (non-detection) 29P/Schwassmann-Wachmann Mar 2025     C/2021 X1 (Maury-Attard) Mar 2025 (non-detection) C/2022 E2 (ATLAS) Mar 2025 C/2023 A3 (Tsuchinshan-ATLAS) Mar 2025	- This page summarises images and observations of comets in 2025. -

19P/Borrelly - Mar 2025 (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 >>

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29P/Schwassmann-Wachmann - Mar 2025

29P/Schwassmann-Wachmann - 2025-03-14 (passing through Leo) Sun Distance 6.27 AU (turning) Earth Distance 5.39 AU (805.7 million km)		29P/Schwassmann-Wachmann - 2025-03-14 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -13.32 arcsec/hr, Dec 3.51 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 9 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-14 23:56 UT (#1301109-17) 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
29P/Schwassmann-Wachmann - 2025-03-18 (passing through Leo) Sun Distance 6.27 AU (turning) Earth Distance 5.42 AU (810.7 million km)		29P/Schwassmann-Wachmann - 2025-03-18 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -12.21 arcsec/hr, Dec 3.22 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 5 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-18 21:45 UT (#1303036-40) 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 >>

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C/2021 X1 (Maury-Attard) - Mar 2025 (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 >>

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C/2022 E2 (ATLAS) - Mar 2025

C/2022 E2 (ATLAS) - 2025-03-14 (passing through Andromeda) Sun Distance 4.01 AU (receeding) Earth Distance 4.47 AU (669.4 million km)		C/2022 E2 (ATLAS) - 2025-03-14 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 10.66 arcsec/hr, Dec -9.79 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 5 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-14 21:22 UT (#1301051-55) 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 >>

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C/2023 A3 (Tsuchinshan-ATLAS) - Mar 2025

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
C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-19 (passing through Delphinus) Sun Distance 3.07 AU (receeding) Earth Distance 3.54 AU (529.4 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-19 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 4.73 arcsec/hr, Dec 25.59 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-03-19 03:56 UT (#1303172-74) 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 2025-03-19 03:58 UT (#1303172-81) 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 >>

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