Compact Galaxy Group Hickson 44

Posted by CraigAndTammy
on Thursday, April 8, 2010

by Craig and Tammy Temple

This beautiful quartet of galaxies in Leo was cataloged by Canadian astronomer Paul Hickson as entry #44 in his Atlas of Compact Groups of Galaxies. From left to right in this image are NGC3193, a magnitude 11.80 elliptical, NGC3190, a magnitude 12.00 edge-on spiral, NGC3187, a magnitude 13.60 peculiar barred spiral and NGC3185, a magnitude 12.90 barred spiral. It is believed that these galaxies are close and gravitationally affecting each other.

Telescope: 10” Orion Newtonian at f/4.7
Accessories: Baader MPCC
Mount: Orion Atlas EQ-G controlled by EQMOD
Guiding: Orion StarShoot AutoGuider on William Optics ZS66
Camera: Canon Digital Rebel T1i, Hap Griffin Baader modified
Filters: Astronomik CLS-CCD EOS Clip
Exposure: 91 x 180sec @ ISO 800 (4hr. 33min.)
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 1 & 5, 2010
Temperature(s): N1:72ºF (dropped to 68ºF); N2:79ºF (dropped to 73ºF)
SQM reading (begin - end): N1:18.59 - 18.84; N2:18.60 - 19.14

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