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Omega Centauri - ED80
NGC5139 - Omega Centauri
Omega Centauri or NGC 5139 is a globular cluster of stars
seen in the constellation of Centaurus, discovered by Edmond
Halley in 1677. It orbits our galaxy, the Milky Way. One of
the few that can be seen with the naked eye, it is the
largest known globular cluster associated with the Milky
Way. Omega Centauri is located about 18,300 light-years
(5,600 pc) from Earth and contains several million
Population II stars. The stars in its center are so crowded
that they are believed to be only 0.1 light years away from
each other. It is about 12 billion years old.
Though it is not a star, Omega Centauri was given a Bayer
designation. Unlike other globular clusters, it contains
several generations of stars. Laura Stanford, a graduate
student in the Research School of Astronomy and Astrophysics
at Australian National University, speculates that it is the
core of a dwarf galaxy several hundred times its present
size which was ripped apart and absorbed by our Milky Way
galaxy. Theoretical modeling by Dr Glenn van de Ven at
Leiden University supports her suspicions.
(From Wikipedia, the free encyclopedia)
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Exposure Data
 | Instrument: 80mm f/7.6 Orion
ED80 |
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| F/stop: 7.6 |
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| Exposure: 2 x 1 min @1600 + 2 x 1 min @800 |
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| Camera: Modified Canon 350D Digital SLR |
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| Sensitivity: ISO 1600 / ISO800 |
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| Date: March 18, 2007 |
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| Exposure start: 00:45 |
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| Location: Heathcote, Victoria |
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| Autoguider: none |
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| Enhancement: Registar 1.0, Adobe Photoshop CS2, |
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| Notes: No guiding, piggy backed on Meade LX200
GPS 8", Meade #1220 field de-rotator / derotator used on Orion ED80 |
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every first Friday of the month. Clear or cloudy
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Members man a number of telescopes of various
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