Emission Nebula NGC6888 - AR 20h 12m 06s DEC +38° 21' 18"
Date/Place2014-08-07 at Tortorici (ME)
ScopeGSO RC8
IntegrationHa+RGB stack
Halpha: 11x1200 sec., bin 1x1
RGB: 6x600 sec. bin 1x1
CCD Temp: -15°C
CommentI imaged also with the OIII filter, but I didn't get enough SNR, so I need more integration in order to include it in this one.
NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun's mass every 10,000 years. The nebula's complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life this star should ultimately go out with a bang in a spectacular supernova explosion. Found in the nebula rich constellation Cygnus, NGC 6888 is about 5,000 light-years away.(Text adapted from APOD)