Deep Sky Object in Spring
M106 (Galaxy in Canes Venatici)

Date & Time: Feb 18 2012, from 23:51 to 24:23 JST(+0900)
Composed 6 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 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

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

M106 (NGC4258) / Galaxy, type SAB(s)bc II-III
R.A.12h 18m 57.8s (2000.0)
Dec.+47° 18' 16" (2000.0)
Apparent Size19.5×7.0'
Radial Velocity+656km/s
Distance21 million light yrs.
Group of GalaxiesCanes II Group
Other IDsUGC7353, MCG8-22-104,
M106 (NGC4258) is a spiral galaxy about 7.5 degree south-east of gamma UMa. Although this galaxy is in Canes Venatici, it's easy to search that from the Big Dipper.
In spring skies, you can find plenty of galaxies, M106 is fairly bright and easy to appreciate in them. The galaxy has visual magnitude of 8.6 and a size of 20 arc minutes, and you can see that the galaxy is stretching north-south direction through a medium-sized telescope. The distance of M106 is estimated about 21 million light years.
Finding chart of M106 Finding chart of M106

  M106 is rather apart from gamma UMa, you can find it easier by tracing eastward from kai UMa just south of gamma UMa.
(Taken with f=100mm telephoto lens)



Copyright(c) 2012 by Naoyuki Kurita, All rights reserved.
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