Deep Sky Object in Spring
NGC3521 (Galaxy in Leo)

Date & Time: Apr 5 2008, from 23:12 to 24:05 JST(+0900)
Composed 6 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1760mm, F6.9)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D80 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3872×2592)
CCD Sensitivity...ISO1600

NGC3521 / Galaxy, type SA:(s:)b II
R.A.11h 05m 48.9s (2000.0)
Dec.-00° 02' 15" (2000.0)
Apparent Size11.0×5.1'
Radial Velocity+673km/s
Distance23.50 million light yrs.
Group of GalaxiesLeo
Other IDsUGC6150, MCG0-28-30
CGCG10-74, PGC33550
This image shows you a spiral galaxy of NGC3521 positioned around the southern edge of Leo. This star field contains no bright guide stars, but you can find it out about 7 degrees southwest from sigma Leo, a tip star of Leo's hind leg.
The galaxy has an elliptical shape with a long axis of about 11 arc minutes and 10th magnitude; you can detect the galaxy as a dimmed light only with small telescopes. It's one of easy-to-appreciate galaxies distributed around this field. Although this picture shows no clear spiral structure, bright nucleus and surrounding dimmed light has been captured. The distance from us is estimated about 23 millions light years, and the galaxy belongs to a Leo galactic cluster same as M65, M66, etc.



Copyright(c) 2008 by Naoyuki Kurita, All rights reserved.
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