Close encounter of Comet C/2022 E3 (ZTF) with NGC 1637 galaxy in Eridanus (Alexandr Zaytsev)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: NGC 1637 · PGC 1075720 · PGC 1076170 · PGC 1076171 · PGC 1076214 · PGC 1077077 · PGC 1077633 · PGC 1077770 · PGC 1078056 · PGC 1078129 · PGC 1078348 · PGC 1079667 · PGC 1080684 · PGC 1081424 · PGC 1081561 · PGC 1082959 · PGC 1083492 · PGC 1084311 · PGC 1084526 · PGC 1084834 · PGC 1084916 · PGC 1085559 · PGC 1086556 · PGC 1087980 · PGC 1088253 · PGC 1092433 · PGC 1093381 · PGC 146441 · PGC 146450 · PGC 146455 · And 2 more.

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Close encounter of Comet C/2022 E3 (ZTF) with NGC 1637 galaxy in Eridanus

Link: https://coalsack.online/chilescope/C2022_E3_ZTF_2023Q1/NGC1637_C2022_E3_ZTF_29x180s_RGB_e16_at.jpg

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Close encounter of Comet C/2022 E3 (ZTF) with NGC 1637 galaxy in Eridanus

Link: https://coalsack.online/chilescope/C2022_E3_ZTF_2023Q1/NGC1637_C2022_E3_ZTF_29x180s_RGB_e16_at.jpg

1h 27min integral RGB exposure of Comet C/2022 E3 (ZTF) passing by weak barred spiral galaxy NGC 1637 in Eridanus (+11.5m and about 30Mly away) - captured remotely using Telescope #3 (ASA-N D = 0.5m f/3.8, FLI ProLine 16803) system of ChileScope over 3 imaging session carried out on Mar 9, 2023 for Comet C/2022 E3 (ZTF) and Mar 12, 14, 2023 for the background. Quite a few other galaxies are also visible in the background.

This scene was captured 13 days before the transit of Comet C/2022 E3 (ZTF) over the LBN 917 nebula captured under [1]:

[1] https://www.astrobin.com/f4a7vt/

Fine details of the internal structure of NGC 1637 galaxy are visible:

A peculiar diffuse object is showing up (predominantly in the R channel) in the central part of the image (not accounted for by [2]) - contrast enhanced version of the area in question from R channel is given below:

Many start are shining through the coma of Comet C/2022 E3 (ZTF), and several distant galaxies are visible right around it:

[2] https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=04+41+10.4-02+42+10&CooFrame=ICRS&CooEqui=2000.0&CooEpoch=J2000&Radius.unit=arcmin&submit=Query+around&Radius=7

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Status	Advanced success
Started	...
Astrometry.net job	7830271
PixInsight job	G7UXVJR10Y645Z3U0SN7DFJJ3FYBSQUR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h41m03s.683
RA (top/left)	04h42m39s.387
RA (top/right)	04h42m37s.119
RA (bottom/right)	04h39m28s.676
RA (bottom/left)	04h39m30s.397

Dec (center)	-02°44′57″.23
Dec (top/left)	-03°08′19″.90
Dec (top/right)	-02°21′06″.92
Dec (bottom/right)	-02°21′43″.11
Dec (bottom/left)	-03°08′47″.56

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Close encounter of Comet C/2022 E3 (ZTF) with NGC 1637 galaxy in Eridanus

Close encounter of Comet C/2022 E3 (ZTF) with NGC 1637 galaxy in Eridanus

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Close encounter of Comet C/2022 E3 (ZTF) with NGC 1637 galaxy in Eridanus

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