Deep Sky Object in Spring
NGC4147 (Globular Cluster in Coma Berenices)

Date & Time: Jan 8 2006, from 25:27 to 25:55 JST(+0900)
Composed 2shots with 5 minutes exposed
Optical: TAKAHASHI 12.5cm(4.9") fluorite refractor (f=1000mm, F8.0)
Auto-guided with VIXEN ATLUX Equatorial & Meade Pictor 201XT
Digital Camera: Fujifilm FinePix S2Pro
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 8bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

NGC4147 / Globular Cluster, type VI
R.A.12h 10m 6.0s (2000.0)
Dec.+18° 33' 00" (2000.0)
Apparent Size4.0'
Real Size70 light yrs.
Distance63,000 light yrs.
A small globular cluster in southwest part of Coma Berenices is NGC4147. You can find the cluster out at 6.5 degrees northeast from Denebola. The constellation of Coma Berenices has another striking globular of M53, both clusters are lying outskirts of the Virgo Cluster. NGC4147 has a brightness of about 10th magnitude and 4 arc minutes in visual diameter.



Copyright(c) 2006 by Naoyuki Kurita, All rights reserved.
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