Deepsky Object in Autumn
NGC7640 (Galaxy in Andromeda)


Date & Time: Jan 3 2022, from 20:10 to 21:04 JST(+0900)
Composed 10 shots with 6 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 & Lacerta M-GEN
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


NGC7640 / Galaxy, type SB(s)c II
R.A.23h 22m 6.0s (2000.0)
Dec.+40° 51' 00" (2000.0)
Apparent Size10.0×1.5'
Radial Velocity+589km/s
Magnitude10.9
Distance30 million light yrs.
Group of GalaxiesNGC7640 Group
Other IDsUGC12554, MCG7-48-2
CGCG532-17, PGC71220
A spiral galaxy positioned at the edge of northwest of Andromeda is NGC7640, with a long axis of about 10 arc minutes. Medium-sized telescopes show you the galaxy as a elliptic dimmed light, but the galaxy has a visual brightness of 11th magnitude, it's rather difficult to detect the detailed structures of it. This picture shows you a bright nucleus and dimmed outer region.



Around NGC7626
NGC7727

Copyright(c) 2022 by Naoyuki Kurita, All rights reserved.
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