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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 ............................... 28/06/2013 - 18:30 UTC
Location ....................................
"Nunki Observatory" - Skiathos
Optics .........................................
Officina Stellare Advanced RILA 400
f/5.25
Tools ..........................................
The SKY X
Camera .....................................
SBIG STXL11002
with
FW8G-STXL (Astrodon filters)
Exposure Time.......................
Luminance: 10 X 30 sec , RGB : - - - (each)
More Details ...........................
Environment Temperature : 24oC Camera Temperature -25οC
Mount ....................................... Paramount
ME
Guiding .................................... Unguided
Processing Details ................ Photoshop ,
Maxim DL v6
Notes ........................................ Weather:
Clear Transparence: Mediun Humidity : 68%
This is the official "First Light" with the new scope and the
new camera. Focusing is in manual mode and not very precise , and
collimation might need a bit improvement.....
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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