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Dates:Jan. 30, 2014
Frames: 42x900"
Integration: 10.5 hours
Avg. Moon age: 29.06 days
Avg. Moon phase: 0.25%
Astrometry.net job: 173487
RA center: 10h 18' 14"
DEC center: -57° 46' 40"
Pixel scale: 1.500 arcsec/pixel
Orientation: -85.334 degrees
Field radius: 0.602 degrees
Resolution: 620x469
Locations: Home Observatory, Werribee, Victoria, Australia
NGC 3199 lies about 12,000 light-years away, a glowing cosmic cloud in the southern constellation of Carina. The nebula is about 75 light-years across in this haunting, false-color view. Though the deep image reveals a more or less complete ring shape, it does look very lopsided with a much brighter edge at the lower right. Near the center of the ring is a Wolf-Rayet star, a massive, hot, short-lived star that generates an intense stellar wind. In fact, Wolf-Rayet stars are known to create nebulae with interesting shapes as their powerful winds sweep up surrounding interstellar material. In this case, the bright edge was thought to indicate a bow shock produced as the star plowed through a uniform medium, like a boat through water. But measurements have shown the star is not really moving directly toward the bright edge. So a more likely explanation is that the material surrounding the star is not uniform, but clumped and denser near the bright edge of windblown NGC 3199. (Text taken from APOD)
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