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The Whale & The Hockey Stick Galaxies
The Whale & The Hockey Stick Galaxies

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Photo Details
templec

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Craig & Tammy

Registered: October 2008
Location: Hendersonville, TN
Posts: 689
users gallery
There are actually 4 galaxies in this image, the major members of the NGC4631 Group. NGC4631, the brightest at magnitude 9.80, is an edge-on spiral known as the Whale Galaxy. Just below, the magnitude 13.10 dwarf elliptical companion galaxy is NGC4627. Above right are a pair of strongly interacting galaxies known as the Hockey Stick. The "handle" is NGC4656 and the "blade" is NGC4657, together they are magnitude 10.40.


Telescope: Astro Tech AT8IN 8” f/4 Newtonian
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: 61 x 180s @ ISO 800 (3hr. 3min.)
Acquisition: ImagesPlus 3.82 Camera Control
Processing: ImagesPlus 3.80a – Calibrated, registered, min/max averaged, DDP
Post-processing: Adobe Photoshop CS4; Gradient XTerminator; Noise Ninja
Date(s): April 6, 2010
Temperature(s): 77ºF (dropped to 74ºF)
SQM reading (begin - end): 18.62 - 18.55
Location: Hendersonville, TN
· Views: 188 · Filesize: 507.0kb, 475.9kb · Dimensions: 1280 x 851 ·
Additional Info
Quick Rate: Poor Excellent
Additional Categories: NGC Catalog

NGC4565_Final.jpg
M102_Final.jpg
M88_Final.jpg
M61_Final.jpg
WhaleHockeyStick_Final.jpg
Hickson44_Final.jpg
NGC2403_Final_annotated.jpg
NGC2403_Final.jpg
M109_Final_annotated.jpg
M109_Final.jpg
M81-M82_Final.jpg
NGC3718_Final.jpg
M33_Final_2400x1600.jpg
M106_Final.jpg
M82_Final_v2.jpg
M108_Final.jpg
M94_Final_v2.jpg
M49_Graded_Final_Annotated.jpg
M49_Graded_Final.jpg

Author
Thread  
BobGillette

Registered: August 2008
Location: Ossipee, New Hampshire
Posts: 184
Fri April 16, 2010 15:19

Lovely fine detail. I had not realized the Hockey Stick is actually two interacting galaxies.


Thanks for sharing, Bob
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templec
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Craig & Tammy

Registered: October 2008
Location: Hendersonville, TN
Posts: 689
Fri April 16, 2010 18:09

Thanks for the kind comments, Bob. We actually didn't know that either until we were looking up information to post with the image. We thought it was very interesting.
- Craig & Tammy
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Barry Etter

Registered: January 2010
Posts: 34
Sat April 17, 2010 07:28

Another quality shot...and at 77F! That T1i must handle thermal noise quite well.
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templec
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Craig & Tammy

Registered: October 2008
Location: Hendersonville, TN
Posts: 689
Sat April 17, 2010 12:11

Thanks, Barry. Yeah, we love the low noise in the T1i.
- Craig & Tammy
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