NGC 4492 & NGC 4485

Posted by CraigAndTammy
on Thursday, May 19, 2011

by Craig and Tammy Temple

Discovered by William Herschel on January 14, 1788, NGC 4490 (Arp 269) and NGC 4485 are a pair of interacting spiral galaxies located some 26 million light-years away in the constellation Canes Venatici. Although these galaxies are now around 24,000 light-years apart, they are still connected by a trail of stars. NGC 4490, with a magnitude of 9.5, is the larger of the two galaxies and is often referred to as the "Cocoon Galaxy."

Telescope: Celestron C8 @ f/8
Accessories: William Optics 0.8x reducer/flattener vII; Dew control by Dew Buster
Mount: Orion Atlas EQ-G controlled by EQMOD performance tuned by Astrotroniks
Guiding: TS-OAG9 Off-axis, using a Starlight Xpress Lodestar via PHD
Camera: QHY9-C one-shot color CCD @ -20.0C
Filters: Hutech IDAS-LPS-P2
Exposure: 34 x 10min. (5hr. 40min.)
Acquisition: Images Plus Camera Control v4.0c
Processing: ImagesPlus 4.0 - calibration, align, combine, HDR-DDP
Post-processing: Adobe Photoshop CS5; Gradient XTerminator; HLVG; Carboni’s Tools
Date(s): April 9, 12 & 13, 2011
Location: Hendersonville, TN, USA
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