(IAAC) Obj: M 83 - Inst: 36" f/5 Dobsonian
Observer: Steve Coe
Your skills: Advanced (many years)
Date/time of observation: April 1995
Location of site: McDonald Obs., Texas (Lat +31, Elev 6000)
Site classification: Rural
Sky darkness: 8 <1-10 Scale (10 best)>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 36" f/5 Dobsonian
Object(s): M 83
Category: External galaxy
Data: mag size
Position: RA : DEC :
36" f/5 20mm Nagler spiral detail is easy, averted vision makes the spiral
structure more obvious and increases size 30%. Many small knots in
the arms. Amazing amount of detail in the spiral arms.
In moments of good seeing there are 10 bright spots within the arms in
a variety of sizes. Several dark lanes show scalloped detail at the
edges of the spiral arms and the arms themselves are silvery in color.
The core of this bright galaxy is a very light yellow, allowing an observer
to see the difference between Population I and Population II stars right
at the eyepiece!
** This observing log automatically submitted via the Web from: