Deep Sky Object in Spring
M87 (Galaxy in Virgo)

Date & Time: Dec 27 2003, from 28:59 to 29:20 JST(+0900)
Composed 3 shots with 8 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Fujifilm FinePix S2 Pro
Location: Ooizumi vil., Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

M87 (NGC4486) / Galaxy, type E+0-1
R.A.12h 30m 49.7s (2000.0)
Dec.+12° 23' 24" (2000.0)
Apparent Size8.3×6.6'
Radial Velocity+1601km/s
Distance51 million light yrs.
Group of GalaxiesVirgo Cluster
Other IDsUGC7654, MCG2-32-105
M87 is a big elliptical galaxy positioned at the center of Virgo Cluster. You can find it around midway of Denebola, beta Leonis and epsilon Virginis. Only small scopes show you a round and dimmed light clearly. M87 has a real diameter of about 130 thousand light years, a bit larger than our Galaxy. And the galaxy is well known as a strong radio source of "Virgo A". Big telescopes can capture a huge jet structure stretching toward WNW with visible ray. It's considered that M87 is a very active galaxy, and a gigantic black hole in center is supplying the energy of its activity.



Copyright(c) 2004 by Naoyuki Kurita, All rights reserved.
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