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(IAAC) Obj: NGC 4546 (H-160-1), NGC 4550 (H-36-1), NGC 4557 - Inst: 20" f/10 classical Cassegrain equatorial fork mount



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Observer: Dave Mitsky
Your skills: Advanced (many years)
Date/time of observation: 2001/4/13-14 3:03 UT
Location of site: Colebrook, PA (Lat 40d N, Elev )
Site classification: Rural
Sky darkness: 5.5+ <Limiting magnitude>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 20" f/10 classical Cassegrain equatorial fork mount
Magnification: 127, 159, 203, and 302x
Filter(s): None
Object(s): NGC 4546 (H-160-1), NGC 4550 (H-36-1), NGC 4557
Category: External galaxy.
Class: Elliptical galaxy
Constellation: Virgo
Data: mag 10.0  size 1.8'x0.8'
Position: RA 12h:36m  DEC -03d:48'
Description:
Using the Y-shaped asterism that appears on page 112 of the Uranometria 2000.0
I was able to log two new Herschel 400 galaxies, NGC 4546 (3:03 UT) and NGC
4550 (3:35 UT), on a not so unlucky Friday the 13th.  NGC 4546 (12h36m,
-03d48') is a tenth magnitude elliptical galaxy that is fairly small and
circular, with a bright stellar core.  To the north lies NGC 4550 (12h36m,
+12d13'), an eleventh magnitude elliptical galaxy that is small, roundish, and
had a bright nucleus.  NGC 4550 is located 0.5 degree south of M89. (Nearby
NGC 4557 was also circular but had a uniform brightness.) Magnifications of
127, 159, 203, and 302x were used on NGC 4546 and 127 and 203x on NGC 4550.
Other galaxies observed while in that neck of the cosmic woods were M58, M87, 
M89, M90, NGC 4557, NGC 4564, and the Siamese Twins, NGC 4567 and 4568.  
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