(IAAC) Obj: M31, Globular & Open Clusters in M31, Part 2 - Inst: 15 inch Obsession f4,5

Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 18 Nov 2004
Location of site: Sangkhlaburi, Thailand (Lat 1509' N, Elev 200m)
Site classification: Exurban
Sky darkness: 6+ <Limiting magnitude>
Seeing: 9+ <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 342x
Filter(s): none
Object(s): M31, Globular & Open Clusters in M31, Part 2
Category: Globular cluster.
Constellation: And
Data: mag various  size various
Position: RA :  DEC :
Extremely clear skies provided me with another chance to look for more GCs in 
M31. I did also observe some objects that I observed on the 16th Nov. GCs that 
were rather difficult on that day, were fairly easy on the 18th as visibility 
was so much better. The seeing was probably not as good but, good enough for 
high magnifications.
G287: (5), 00 44 42, +41 43 55, V 15,8,  extremely faint and stellar. Very 
difficult even with averted vision (AV)
G305: (4), 00 45 41, +41 45 33, V 15,6,  faint but fairly easy with averted 
vision. Stellar.
G286: (4), V 15,7, requires AV, non-stellar fairly big (3) smudge of light), 
no central brightening or core.
G270: (5), ?, extremely faint. AV only, pops up as a stellar object. G270 is
logged on the picture in the Deep Sky Observer's Handbook but not in lists
detailing the object's brightness. I estimate its brightness to 15,8-15,9mag.
G233: (2), 00 43,6, +41 08 26, V 15,4, fairly easy and directly visible (then 
stellar). With averted vision non-stellar.
Two objects from 16 Nov (G252 and G213) were 2 levels easier to observe than on 
the 16th. I think that I have reached the limits of my 15 inch last night with 
the observation of all those objects. It brings the number of objects I have 
seen in M31 to 23 (!), including Mayall 2 a few years earlier and NGC 206.
As a reference map for all the observations of GCs and Cs in M31 I did use a 
picture with locations of the objects from Deep Sky Observer's Handbook.
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