M100 and Virgo Cluster Companions (David Payne)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: HD107726 · IC 783 · M 100 · NGC 4312 · NGC 4321 · NGC 4322 · NGC 4323 · NGC 4328 · PGC 1490473 · PGC 3090631 · PGC 3090632 · PGC 3096132 · PGC 39956 · PGC 39997 · PGC 40002 · PGC 40044 · PGC 40045 · PGC 40068 · PGC 40083 · PGC 40130 · PGC 40159 · PGC 40171 · PGC 40184 · PGC 40214

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M100 and Virgo Cluster Companions

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M100 and Virgo Cluster Companions

M100 et al
Planewave CDK12.5 ; AP 1100GTO AE; ASI6200MM, - Antlia Pro Filters (Ha 3.5nm)
H: (37 x 450s Bin 1, Gain 200); R,G,B: (38,36,31 x 120s, Bin 1, Gain 100); L: (50x150s, Bin 1, Gain 100)
Total integration time = 10.2 hrs (Feb 4,12,13; Mar 15,16; 2024)

At 55 million lys away in Coma Berenices, M100 appears to be a classic “Grand Design” spiral galaxy. However, it is somewhat different from other galaxies in that a bright star-like core cannot be seen at its centre. In addition, a strong red Ha signal is noted right into the core indicating new star formation - closer to the core than the vast majority of other spirals where only older yellow stars are found. M100 is indeed considered a starburst galaxies due to the high degree of new star formation taking place throughout the spiral arms and several supernovae have been recorded here since 1900. M100 is about 107,000 lys away and occupies about 7’ of sky.

M100 and its galactic companions, including the edge on the NGC4312 are actually part of the Virgo Cluster, that contains mainly elliptical shaped galaxy with a generally low level of new star creation. The variety of galaxies in this image is interesting, including one that seems to be little more than a wispy cloud of stars.

Imaging was a mixture of cloud and moisture avoidance coupled with light frame rejection with processing. Imaging here in winter can be a huge challenge.

Imaged with N.I.N.A.
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Status	Advanced success
Started	...
Astrometry.net job	9545714
PixInsight job	TB265JZLBK1EFQQ9PQHFER0D3RDCM3EE
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h22m34s.360
RA (top/left)	12h21m31s.451
RA (top/right)	12h21m32s.285
RA (bottom/right)	12h23m36s.237
RA (bottom/left)	12h23m35s.949

Dec (center)	+15°41′37″.16
Dec (top/left)	+16°00′59″.99
Dec (top/right)	+15°22′05″.54
Dec (bottom/right)	+15°22′10″.30
Dec (bottom/left)	+16°01′06″.39

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M100 and Virgo Cluster Companions

M100 and Virgo Cluster Companions

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M100 and Virgo Cluster Companions

M100 and Virgo Cluster Companions

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