The Crescent Nebula (NGC 6888) imaged in Ha and OIII

Posted by Steve Pastor
on Thursday, October 22, 2015

The Crescent Nebula (NGC 6888) is an emission nebula found in the constellation Cygnus. The emission is powered by strong stellar winds from a Wolf-Rayet star colliding with previously expelled outer envelopes of the stars atmosphere. This image is a combination of 5 hrs of H alpha data (Astrodon 5 nm Gen 2 filter) and 5 hrs 20 m of O[III] data (Astrodon 3 nm Gen 2 filter). Taken with a Takahashi CCA-250 f/5 astrograph and QSI683wsg camera on a Paramount ME; August 11th , 13th and Sept 14th - 17th, 2015 in Mayhill, NM (Ha, 15 x 1200 sec lights @ -20o C; O[III], 16 x 1200 sec lights @ -20o C 21 darks; 126 bias; 128 flats) Image acquisition MaxIm DL 6.08; Processed in PixInsight 1.8.4.1185 Ripley (x64). The calibrated, aligned, and integrated Ha and O[III] images were stretched using Masked Stretch, Ha stretch matched to O[III] with Linear Fit, and combined using Pixel Math.

Comments
To leave a comment you must be a member of our community.
Login to your account now, or register for an account to start participating.
No one has commented yet.
Join our Community!

Our community is FREE to join. To participate you must either login or register for an account.

ADVERTISEMENT
FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. View our Privacy Policy.

ADVERTISEMENT
ADVERTISEMENT
Find us on Facebook