David's Astronomy Pages Images - Session 1105 (2023-03-08)

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Session Notes

C/2020 V2 (ZTF) - Comet C/2022 E3 (ZTF) - Comet C/2022 U2 (ATLAS) - Comet     AT 2023cts - Type YSO? Transient     NGC 1642 - Spiral Galaxy with Type Ia-91bg Supernova 2023bhm NGC 2283 - Spiral Galaxy with Type II Supernova 2023axu     UGC 3044 - Irregular Galaxy with Type II Supernova 2023cf     Variable Stars (photometric monitoring) - None      Nearby Stars (astrometric monitoring) - HH And, Groombridge 34

- Attempted all-night session (3.8 hours), but dome locked early due to threat of snow.  Cold night (-3 to -5.5°C)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -5°C (min) - CCD Temperature:    -25°/-30°C - Notes from 2023-03-08 >>

C/2020 V2 (ZTF) - Comet

C/2020 V2 (ZTF) - 2023-03-08 (passing through Andromeda) Sun Distance 2.33 AU (approaching) Earth Distance 2.72 AU (407.6 million km)		C/2020 V2 (ZTF) - 2023-03-08 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 29.00 arcsec/hr, Dec -52.60 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 22:02 UT (#1105085-87) 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) 15 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 22:09 UT (#1105085-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2020 V2 (ZTF) on Comets 2022 Page >>  Images of C/2020 V2 (ZTF) on Comets 2023 Page >>

C/2020 V2 (ZTF)  - False Colour Inverse Spectrum Images

C/2020 V2 (ZTF)  - 2023-03-08

False Colour CCD Image (70% size, log scale) 15 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 22:09 UT (#1105085-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2022 E3 (ZTF) - Comet

C/2022 E3 (ZTF) - 2023-03-08 (passing through Eridanus) Sun Distance 1.42 AU (receediing) Earth Distance 1.17 AU (175.6 million km)		C/2022 E3 (ZTF) - 2023-03-08 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 13.15 arcsec/hr, Dec -54.92 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 20s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 21:25 UT (#1105025-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 39 x 20s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 21:33 UT (#1105025-64) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2022 E3 (ZTF) on Comets 2023 Page >>
Images of C/2022 E3 (ZTF) on Comets 2022 Page >>

C/2022 E3 (ZTF)  - False Colour Inverse Spectrum Images

C/2022 E3 (ZTF) - 2023-03-08

False Colour CCD Image (70% size, log scale) 39 x 20s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 21:33 UT (#1105025-64) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2022 U2 (ATLAS) - Comet

C/2022 U2 (ATLAS) - 2023-03-08 (passing through Orion) Sun Distance 1.54 AU (receeding) Earth Distance 0.95 AU (141.6 million km) Position of comet (faint) is indicated by white cross-hairs		C/2022 U2 (ATLAS) - 2023-03-08 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 68.30 arcsec/hr, Dec -98.36 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 90s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 22:46 UT (#1105109-10) 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 U2 (ATLAS) on Comets 2023 Page >>

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AT 2023cts - Type YSO? Transient

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NGC 1642 - Spiral Galaxy with Type Ia-91bg Supernova 2023bhm

NGC 1642 with SN 2023bhm (Taurus) SN 2023bhm (Type: Ia-91bg) discovered 2023-02-02.138 UT by ZTF Alias: ZTF21abyguqw Discovery Mag 18.11 (g-ZTF filter)  ( Rochester Supernova site | TNS 2023bhm )

NGC 1642 with SN 2023bhm - 2023-03-08 (T+34.7d) Image below (2023-03-08.861) was taken 34.7 days after discovery of 2023bhm Position of reported SN (faint but distinct) is shown by white cross-hairs Measured magnitude +13.92 ( ? ), Nucleus + SN

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 20:49 UT (#1105011-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023bhm (NGC 1642) on Supernova 2023 Page >>

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NGC 2283 - Spiral Galaxy with Type II Supernova 2023axu

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UGC 3044 - Irregular Galaxy with Type II Supernova 2023cf

UGC 3044 with SN 2023cf (Taurus) SN 2023cf (Type: II) discovered 2023-01-07.225 UT by ZTF Alias: ZTF23aaaatjn Discovery Mag 17.51 (orange-ATLAS filter)  ( Rochester Supernova site | TNS 2023Q )

UGC 3044 with SN 2023cf - 2023-03-08 (T+60.7d) Image below (2023-03-08.933) was taken 60.7 days after discovery of 2023cf Position of reported SN (faint but still distinct) is shown by white cross-hairs Measured magnitude +16.82

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-03-08 22:26 UT (#1105102-03) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023cf (UGC 3044) on Supernova 2023 Page >>

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