(IAAC) Obj: NGC 6544, NGC 6553 - Inst: 15 inch Obsession f4,5

[anonymous at sedna.atmob.org]

----

Observation Poster: Armin Hermann <burmeseinn at yahoo.com>

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 03 Oct 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: ~5 <Limiting magnitude>
Seeing: 7-8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 131 and 342x
Filter(s): none
Object(s): NGC 6544, NGC 6553
Category: Globular cluster.
Class: 
Constellation: Sgr
Data: mag 8,1magv  size 9'
Position: RA :  DEC :
Description:
NGC 6544:
This cluster is located just 1° NNW of 6553 and stands in strong contrast to 
its neighbor. At 342x the cluster shows stars right into the center which is 
bright and dense. The stars of 6544 seem to be ~1mag brighter on average than 
the neighbor’s stars. NGC6544 is approx. 4’ in diameter and located in a rich 
field with many brighter stars.NGC6544 and 6553 are a good target for 
comparison.

NGC 6553:
At 131x magnification the cluster is just resolved into a few faint members at 
the edge. A bright star (~11mag) is located at the W-edge of the cluster. 342x 
shows a few more stars but the center remains unresolved though it appears 
granular. The diameter of 6553 is approx 5’. The GC does not brighten much 
towards the center and looks like a little concentrated object.


--
Optional related URLs: 
** This observing log automatically submitted via the Web from:
  http://www.visualdeepsky.org/enter-log.html