The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY (Paul H)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD117815 · IC 4263 · IC 4277 · IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool Galaxy

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The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY

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The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY

The Whirlpool Galaxy (M51) is one of my favorite targets and I was lucky enough to capture over 24 hours of data over 7 nights from May 13th thru May 19th. My camera rotation is ~ 0 degrees so I was going to rotate the image 90 degrees counter clockwise and crop the top and bottom for a landscape view of the image which would be rotated to my preferred view and M51 would fill the screen better.

As I was examining the image I noticed a galaxy cluster at the middle left hand side. I searched to see if I could find any information on it and it turned out to be Zwicky [ZW 1330+4725] 6057? at ~2 BLY away. I found multiple posts of people saying the distance was 2.3 BLY but I could not find the actual source data myself. If this is inaccurate please let me know. If correct this is the furthest named object I've imaged. With this information it was an easy decision to not rotate and crop.

Fritz Zwicky used these galaxy clusters for his work with redshifts. In 1933 he was examining the Coma galaxy cluster and used the virial theorem to discover a gravitational anomaly which he called "dunkle Materie" or "dark matter".

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Status	Advanced success
Started	...
Astrometry.net job	7830377
PixInsight job	W6CL0444VZ4LIK9U37IDTK1T0W37UDBA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m52s.198
RA (top/left)	13h32m30s.463
RA (top/right)	13h27m14s.901
RA (bottom/right)	13h27m15s.650
RA (bottom/left)	13h32m27s.355

Dec (center)	+47°11′55″.29
Dec (top/left)	+47°29′24″.75
Dec (top/right)	+47°29′46″.93
Dec (bottom/right)	+46°54′12″.15
Dec (bottom/left)	+46°53′51″.58

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The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY

The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY

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The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY

The Whirlpool Galaxy - M51 (HaLRGB) with the Zwicky 6057? [ZW 1330+4725] Cluster of Galaxies at ~2 BLY

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