Deep Sky Object in Spring
NGC4565 (Galaxy in Coma Berenices)

Date & Time: Mar 4 2017, from 24:27 to 25:04 JST(+0900)
Composed 10 shots with 4 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...ISO6400, White Balance...Daylight

NGC4565 / Galaxy, type SA(s)b? sp I
R.A.12h 36m 20.6s (2000.0)
Dec.+25° 59' 20" (2000.0)
Apparent Size15.8×2.1'
Radial Velocity1243km/s
Distance45 million light yrs.
Group of GalaxiesNGC4565 Group
Other IDsUGC7772, MCG4-30-6,
CGCG129-10, PGC42038
NGC4565 is one of the brightest and largest galaxies without Messier's numbers scattered around the constellation of Coma Berenices. The galaxy is fairly popular one because it's often quoted as a very typical example of the "edge-on" galaxy. This edge-on galaxy is about 45 million light years away and has an apparent size in the thickness-direction of only 2 arc minutes, but has a length of more 15 arc minutes, equivalent to the half of an apparent diameter of full-moon. It might be easy to search the galaxy with the binoculars; you can recognize it as a narrow line in the conditioned sky.
You will be able to enjoy the galaxy looks like the front-view of a plane with scopes. Though this picture shows you a dark lane crossing, you might need a bit larger scope to see the lane with naked-eyes. The galaxy has a long-short ratio of about 14:1. Almost all of typical galaxies have such a thin figure, of course including our Galaxy.



Copyright(c) 2017 by Naoyuki Kurita, All rights reserved.
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