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M13: Globular Cluster in Hercules

RA = 16 hrs 41 min; Dec = 36 deg 27 min

Date & Site:
6/16/14; Runningman Observatory, Carlsbad, CA

Telescope: FSQ106 (530 mm fl f/5)

Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10 with Astrodon Gen II filters;

Piggyback guide scope (AT66ED) with SBIG guide camera


Exposures and filters: 20 minutes each of RGB for a total of 1 hr.

FOV =96 x 65 arc minutes

M13 is a globular cluster of about 300,000 stars. The Arecibo Message of 1974, containing encoded information about the human race, DNA, atomic numbers, Earth's position, and other information, was beamed towards M13 to allow it to be picked up by potential extraterrestrial civilizations in the cluster. The message will reach the cluster in 25,000 years.

Globular star clusters are tightly held together by gravity which remain intact after billions of years. The stars in M13 or other globulars are thought to be 12 to 13 billion years old.

The small galaxy seen in the lower left is NGC 6207, a 12th mag spiral galaxy

Located 22,200 light years away

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