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Object(s): NGC 520, Arp 157
Observer: Mark G. Birkmann
Your skills: Intermediate (some years)
Date/time of observation: 9-7-2000, 8:00 UT (3:00 CDT)
Location of site: New Haven, Missouri (Lat ~38, Elev ~700 feet)
Site classification: Rural
Sky darkness: 5 in moderate fog <1-10 Scale (10 best)>
Seeing: 5 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 40" f/5 dob
Magnification: 408x
Filter(s): none
Category: external galaxy
Class: peculiar
Constellation: Pisces
Data: mag 12.2(B)  size 4.5' x 1.8' 
Position: RA 01h:24m 34.3s  DEC +03:47'43"

Description:
This galaxy (pair?) is relatively easy to find.  There appeared to be two components.  One was shaped somewhat like a boomerang, bright on the northwest end and gradually fading into the background sky glow on the southeast end.  The convex side of the bend was to the southwest.  A faint, wedge shaped area of nebulosity was located adjacent to and south of this fainter end with a dark lane running in between.  At times the center of the bright section seamed to be stellar.  I neglected to write down which way north was when making the drawing.  I have based my directions in this description on the dss image.