Deep Sky Object in Spring
NGC4725 (Galaxy in Coma Berenices)
|Date & Time: ||Mar 24 2018, from 26:17 to 27:12 JST(+0900)
|Composed 10 shots with 5 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: ||Nikon D810A
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)|
|Sensitivity...ISO4000, White Balance...Daylight|
NGC4725 is a medium sized galaxy positioned around center of a constellation of Coma Berenices.
The galaxy isn't so well known because there are many famous galaxies being distributed around this star-field.
But has a diameter of 10 arc minutes and 10th magnitude, it's unexpectedly worth seeing.
|NGC4725 / Galaxy, type SAB(r)ab pec II|
|R.A.||12h 50m 26.7s (2000.0)|
|Dec.||+25° 30' 01" (2000.0)|
|Distance||42 million light yrs.|
|Group of Galaxies||NGC4565 Group|
NGC4725 is a galaxy classified in so-called the "Bared galaxy"; it consists of bar-structure across the nuclei and a pair of arms surrounding them.
The arms of NGC4725 are coiled up fairly tight, it seems that the arms surround the galaxy in circumference.