(IAAC) Obj: M 55 - Inst: 4.5" f/4.0 Newtonian reflector

anonymous at sedna.atmob.org anonymous at sedna.atmob.org
Thu Oct 12 16:44:13 EDT 2006


Observation Poster: Brent Reary <gmbreary at rollanet.org>

Observer: Brent Reary
Your skills: Intermediate (some years)
Date/time of observation: 09/24/06  02:05 UT
Location of site: Rolla, MO  USA (Lat 37 57'N, Elev )
Site classification: Rural
Sky darkness: 6.5 <Limiting magnitude>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 4.5" f/4.0 Newtonian reflector
Magnification: 150x
Filter(s): None
Object(s): M 55
Category: Globular cluster.
Constellation: Sgr
Data: mag 6.4  size 15'
Position: RA 19:40  DEC -30:58
An irregular circular halo which shows slight, gradual brightening to a
diffuse, circular core.  The core is only slightly brighter than the
haze in which it sits.  A scattering of faint stars are resolved completely
across the cluster and a 9th magnitude field star is located just off the
SSE edge.

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