(IAAC) Obj: NGC 3501, NGC 3507 - Inst: 10.1" f/4.5 Newtonian reflector

[anonymous at sedna.atmob.org]

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Observation Poster: Brent Reary <gmbreary at rollanet.org>

Observer: Brent Reary
Your skills: Intermediate (some years)
Date/time of observation: 4/19/07  04:15 UT
Location of site: Rolla, MO  USA (Lat 37 57'N, Elev )
Site classification: Rural
Sky darkness: 6.5 <Limiting magnitude>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 10.1" f/4.5 Newtonian reflector
Magnification: 77x, 128x, 193x, 257x
Filter(s): None
Object(s): NGC 3501, NGC 3507
Category: External galaxy.
Class: 
Constellation: Leo
Data: mag   size 
Position: RA :  DEC :
Description:
NGC3501; Mag 12.9, Size 2.0' X 0.5', RA 11:03, DEC +17:59
A faint, uniform, elongated oval halo aligned NE-SW.  It shows no detectable
brightening toward the core.  Steadily visible with averted vision at 128x,
it began to fade into the background at 193x.  NGC3507 lies ~12' NE..

NGC3507; Mag 10.9, Size 2.0' X 2.0', RA 11:03.5, DEC +18:08
A uniform round halo which gradually brightens to a fairly bright, diffuse
core.  An 11th magnitude field star is superimposed on the halo just to the
E. of the core.  A 10th magnitude star is located just off the S. edge.
Visible with direct vision at 77x, the galaxy was best seen at 193x-257x.

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