Deep Sky Object in Spring
M100 (Galaxy in Coma Berenices)


Date & Time: Dec 6 2013, from 27:40 to 28:23 JST(+0900)
Composed 8 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Canon EOS 600D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
CCD Sensitivity...ISO3200




M100(NGC4321) / Galaxy, type SAB(s)bc I
R.A.12h 22m 55.2s (2000.0)
Dec.+15° 49' 23" (2000.0)
Apparent Size5.3×4.5'
Radial Velocity+1899km/s
Magnitude10.6
Distance53 million light yrs.
Group of GalaxiesVirgo Cluster
Other IDsUGC7450, MCG3-32-15
PGC40153
M100 is one of bright spiral galaxies belonging to the Virgo Cluster spreading around Virgo and Coma Berenices. The galaxy is lying at the northern edge of the cluster in the Coma Berenices, has a size of about 5 arc minutes and a magnitude of 10.
M100 is a typical spiral galaxy being two arms coiled up loosely, we're overlooking the galaxy its bulge; so-called the face-on galaxy. It looks like a shrinked Pinwheel Galaxy M101 in the Ursa Major.
M100 is about 41 million light years away from our Galaxy.




M99

M104(Sombrero Nebula)


Copyright(c) 2014 by Naoyuki Kurita, All rights reserved.
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