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)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight

NGC4725 / Galaxy, type SAB(r)ab pec II
R.A.12h 50m 26.7s (2000.0)
Dec.+25° 30' 01" (2000.0)
Apparent Size10.8×7.6'
Radial Velocity+1243km/s
Distance42 million light yrs.
Group of GalaxiesNGC4565 Group
Other IDsUGC7989,MCG4-30-22
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 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.



Copyright(c) 2018 by Naoyuki Kurita, All rights reserved.
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