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Object
............................................ Hercules Great Globular
Cluster
Constellation .............................. Hercules
RA / DEC
.....................................
16h:41m.41sec /
+36°
27m.35sec
Distance + Ap. Magnitude......... 25.100 Light years /
5.8
Date + Time ............................... 18/06/2013 - 17:20 UTC
Location ....................................
"Nunki Observatory" - Skiathos
Optics .........................................
Celestron
C11 HD f/10
Tools ..........................................
CCDsoft
Camera .....................................
SBIG ST10XE with CFW10 (Astrodon filters)
Exposure Time.......................
Luminance: 11 X 30 sec , RGB : 5 X 300 sec (each)
More Details ...........................
Environment Temperature : 23oC Camera Temperature 20οC
Mount ....................................... Paramount
ME
Guiding .................................... Unguided
Processing Details ................ Photoshop , CCDsoft
Notes ........................................ Weather:
Partialy thin clouds Transparence: Mediun Humidity : 65%
Target details .........................
Messier 13 (M13),
also designated NGC 6205 and sometimes called the Great
Globular Cluster in Hercules or the Hercules Globular Cluster,
is a
globular cluster of about 300,000 stars in the
constellation of
Hercules.
M13 was discovered by
Edmond Halley in 1714, and catalogued by
Charles Messier on June 1, 1764.
It is barely visible with the
naked eye on a very clear night. Its diameter is about 23 arc
minutes and it is readily viewable in small telescopes.
M13 is about 145 light-years in
diameter, and it is composed of several hundred thousand
stars,
the brightest of which is the
variable star V11 with an apparent magnitude of 11.95. M13 is
25,100 light-years away from
Earth
The
Arecibo message of 1974, containing encoded information about
human race, DNA, atomic numbers, Earth position, was beamed there
for being picked up by a potential
extraterrestrial civilization. It will reach the cluster in
25,100 years.
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