(IAAC) Obj: M 30 - Inst: 4.5" f/4.0 Newtonian reflector

anonymous at sedna.atmob.org anonymous at sedna.atmob.org
Thu Oct 12 17:01:42 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  02:30 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 30
Category: Globular cluster.
Constellation: Cap
Data: mag 7.3  size 10'
Position: RA 21:40.5  DEC -23:10.5
A faint, irregular, circular halo which seems somewhate flattened on the
SE edge.  It brightens abruptly to a bright, dense, diffuse, circular core.
While a handfull of stars are resolved across the cluster, more are resolved
around the W-NW edge than elsewhere.  A pair of stars, aligned nearly N-S
are located just off the N. edge of the core.  An 8th magnitude field star
is just off the W. edge of the halo.
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