The Needle Galaxy (NGC 4565)

Posted by CraigAndTammy
on Tuesday, April 13, 2010

by Craig and Tammy Temple


Approximately 20 million light-years away in the constellation Coma Berenecies, lies one of the best-known examples of an edge-on spiral galaxy. NGC4565 is a magnitude 10.42 unbarred spiral galaxy (type SA(s)b) discovered in 1785 by Sir William Herschel. Many astronomers are amazed that Charles Messier missed this magnificent object.

Telescope: Celestron C8 Schmidt-Cassegrain
Accessories: Celestron f/6.3 reducer/corrector; Dew control by Dew Buster®
Mount: Orion Atlas EQ-G controlled by EQMOD
Guiding: TS-OAG9 Off-axis, using Orion StarShoot AutoGuider
Camera: Canon Digital Rebel T1i, Hap Griffin Baader modified
Filters: Astronomik CLS-CCD EOS Clip
Exposure: 42 x 480sec @ ISO 800 (5hr. 36min.)
Acquisition: ImagesPlus 3.82 Camera Control
Processing: ImagesPlus 3.80a – Calibrated, registered, averaged, DDP
Post-processing: Adobe Photoshop CS4; Gradient XTerminator; Noise Ninja
Date(s): April 9 & 10, 2010
Temperature(s): N1:58ºF (dropped to 49ºF); N2:63ºF (dropped to 53ºF)
SQM reading (begin - end): N1:18.85 - 19.30; N2:19.03 - 19.30

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