Deep Sky Object in Spring
M99 (Galaxy in Coma Berenices)


Date & Time: Mar 22 2014, from 22:10 to 22:53 JST(+0900)
Composed 8 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a 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)
Sensitivity...ISO3200




M99 (NGC4254) / Galaxy, type SA(s)c I-II
R.A.12h 18m 49.3s (2000.0)
Dec.+14° 25' 07" (2000.0)
Apparent Size4.6×3.9'
Radial Velocity+2735km/s
Magnitude10.1
Distance55 million light yrs.
Group of GalaxiesVirgo Cluster
Other IDsUGC7345, MCG3-31-99,
PGC39578
M99 is a spiral galaxy in west region of the Virgo Cluster like M98 in previous page. The galaxy is lying apart about 1.3 degrees ESE from M98, has an apparent diameter of 4 minutes and 10th magnitude. M99 shows us a unique "face-on" shape of two arms whirling. You will recognize these arms being asymmetric.




M98

M100


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