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 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.
|M87 (NGC4486) / Galaxy, type E+0-1|
|R.A.||12h 30m 49.7s (2000.0)|
|Dec.||+12° 23' 24" (2000.0)|
|Distance||51 million light yrs.|
|Group of Galaxies||Virgo Cluster|
|Other IDs||UGC7654, MCG2-32-105|