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(IAAC) Obj: NGC4594 (M104) - Inst: 30CM, F:10, SCT, LX200



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Observation Poster: Jim Aderson <madmoon@bellsouth.net>
Observer: Jim Aderson
Your skills: Intermediate (some years)
Date/time of observation: 05012000/22:00CST
Location of site: Prude Ranch, Ft. Davis, TX (Lat 30.1N, Elev ?)
Site classification: Rural
Sky darkness: 9/10 <1-10 Scale (10 best)>
Seeing: 7/10 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 30CM, F:10, SCT, LX200
Magnification: 203x
Filter(s): None
Object(s): NGC4594 (M104)
Category: External galaxy.
Class: Sa
Constellation: Vir
Data: mag 8.0v  size 8.9' x 4.1' 
Position: RA 12:40.0  DEC -11:38
Description:
203x - NGC4594 (M104) is a spiral galaxy seen near edge on. It is tilted toward
the viewer about 5 degrees so you are seeing the top of the disk and a little
of the spiral arms on the far side. The core is round and very bright, but
without a stellar nucleus, rather a small oval area that is a little brighter
than the core it's self. The core fades toward it's boundry with the a globe of
haze, the halo, aproximately 1/3 the size of the whole galaxy is quite evident
even with direct vision. The spiral arms are easy bright with the obscuring
dust lane, like a tire around the rim of a solid looking wheel. The dust lane
is narrow and dense, appearing to completely obscure the light from beyond. 
The top edge seems to be pretty sharp, while the bottom edge seems a little
soft and with a little motteling. The ends of the dust lane seem to wrap around
and extend back toward thw core, but fade away behind the hazy halo. Above the
galaxy is a stream of stars with one much brighter than the remainder. There is
a relatively bright stsr just below the halo and another near above,
superimposed on the haze.
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