Deep Sky Object in Spring
M90 (Galaxy in Virgo)
|Date & Time: ||Apr 28 2017, from 22:28 to 23:02 JST(+0900)
|Composed 12 shots with 3 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: ||Nikon D810A
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)|
|Sensitivity...ISO6400, White Balance...Daylight|
M90 is a member of Virgo Cluster just 40 arc minutes north of M89 in previous page.
The galaxy has an apparent shape of elliptic a bit stretched in north-south direction.
Although M90 has a long axis of 10 arc minutes, it's fairly dimmed because of its brightness of 10.
So it's difficult to resolve detailed structures with amateur telescopes.
Actually M90 is a spiral galaxy classified as Sc type, a dark lane is striking around the central nucleus.
|M90 (NGC4569) / Galaxy, type SAB(rs)ab I-II|
|R.A.||12h 36m 50.0s (2000.0)|
|Dec.||+13° 09' 48" (2000.0)|
|Distance||55 million light yrs.|
|Group of Galaxies||Virgo Cluster|
|Other IDs||UGC7786, MCG2-32-155|