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NGC5139 / Omega Centauri

Classification: Globular cluster; (Vlll) A spherical collection of stars that orbits a galactic core as a satellite.
Constellation: Centaurus (CEN)
Object Location: Ra 13h 27m 40s Dec -47° 33’2 (current)
Size & Distance: 55.0 x 55.0 Apx 15,800 light-years.

Date & Location: 5-11-2013 Little Blair Valley, CA
Exposure: LRGB L= 10 @ 30sec. RGB 10ea. @ 60sec. (bin 1x1)
Optics: Takahashi Epsilon 210 f/3 630mm
Mount: Astro-Physics 1200 GTO / ATS 10 x 36 Pier.
Camera: SBIG-ST10XME @-10c / PDF focuser
Filters: Astrodon Gen2 LRGB
Software: MaxImDL 5.45, Photoshop CS5

Notes: Sky conditions: Good seeing, Light winds, Temp 71°
Image Field of view is 54 x 80 arcmin.

Omega Centauri or NGC 5139, is a globular cluster in the constellation of Centaurus that
was discovered by Edmond Halley in 1677. Located at a distance of 15,800 light-years,
it is the largest globular cluster in the Milky Way galaxy at a diameter of roughly 150 light-years.
It is estimated to contain approximately 10 million stars and a total mass equivalent to 4 million suns..

Omega Centauri is so distinctive from the other galactic globular clusters that it is thought to
have an alternate origin as the core remnant of a disrupted dwarf galaxy.