NGC 6888; Crescent Nebula

The following astronomical image was taken by a user of GoldAstro.com products and presented here by permission.  Copyrights may apply.  Please contact the credited imager to inquire about permission for use and/or availability of larger images.

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Object(s):	NGC 6888; Crescent Nebula; Caldwell 27; Sharpless 105; emission nebula
Telescope:	Meade 12" LX200GPS f/5.9
Camera:	Atik 383L+
Mount:	Meade LX200GPS w/ Superwedge, permanent pier
Filters:	Orion S-II and H-a 7nm narrowband; Baader O-III 8.5nm narrowband;
Focus and Collimation:	GoldFocus Plus Collimation Mask and Analysis Software v3.0
Autoguide:	GoldGuide v2.1 w/ Orion 102mm Mak-Cass f/12.0, Meade DSI Pro II
Exposure:	H-a:O-III:S-II = 375:410:390 min.; 5 min. subframes; total 19.6 hours
Process:	H-a:O-III:S-II = RGB, CFHT palette; proprietary software, PixInsight 1.8, Photoshop CS4
FOV:	23' x 23'
Date(s):	1, 5 & 6 August 2012
Credit:	Copyright © 2012 Jeff Winter, click for Inquiries