Spiral Galaxy Messier 99 (M99) in Coma Berenices (Tom Wildoner)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: Coma Pinwheel · HD107170 · HD107254 · M 99 · NGC 4254 · Virgo Cluster Pinwheel

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Spiral Galaxy Messier 99 (M99) in Coma Berenices

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Spiral Galaxy Messier 99 (M99) in Coma Berenices

Messier 99 or M99 (NGC 4254) in the constellation Coma Berenices is a spiral galaxy approximately 56 million light-years away from Earth. Burnham states, “The spiral pattern is very well defined, although somewhat asymmetric, with an unusually far-extending arm on the west side….”

Observation data (J2000 epoch)
Constellation: Coma Berenices
Right ascension: 12h 18m 49.625s
Declination: +14° 24′ 59.36″
Distance: 45.2 Mly
Group or cluster: Virgo Cluster
Apparent magnitude (V): 9.9

Tech Specs: Orion 8" f/8 Ritchey-Chretien Astrograph Telescope, Sky-Watcher EQ6R-Pro mount that is pier mounted, ASI071MC-Pro, ZWO AAPlus, ZWO EAF, 54 x 60 seconds at -10C, processed using DSS and PixInsight. Image Date: March 26, 2023. Location: The Dark Side Observatory (W95), Weatherly, PA, USA (Bortle Class 4).

Messier Objects

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Status	Advanced success
Started	...
PixInsight job	1YI1MQ8XAQIJICKTZGGZIWHKWIM61XDQ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h18m56s.291
RA (top/left)	12h17m46s.600
RA (top/right)	12h18m12s.930
RA (bottom/right)	12h20m06s.411
RA (bottom/left)	12h19m39s.317

Dec (center)	+14°25′34″.65
Dec (top/left)	+14°41′35″.40
Dec (top/right)	+14°04′44″.84
Dec (bottom/right)	+14°09′21″.29
Dec (bottom/left)	+14°46′25″.30

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Spiral Galaxy Messier 99 (M99) in Coma Berenices

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Spiral Galaxy Messier 99 (M99) in Coma Berenices

Spiral Galaxy Messier 99 (M99) in Coma Berenices

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