Tag Archives: NGC 4631

NGC 4631, Whale Galaxy

27.04

NGC 4631 (also known as the Whale Galaxy or Caldwell 32) is an edge-on spiral galaxy in the constellation Canes Venatici. This galaxy’s slightly distorted wedge shape gives it the appearance of a herring or a whale, whence its nickname. Because this nearby galaxy is seen edge-on from Earth, professional astronomers observe this galaxy to better understand the gas and stars located outside the plane of the galaxy.
Observation Notes : Very bright, very large, very much elongated 6 X 1 in PA 90, bright middle. At 100X this very mottled galaxy is a rather bizarre shape that members of the Saguaro Astronomy Club call “The Slug”. Discovered in 1787 by William Herschel.

Imaging telescopes or lenses: Celestron C11 Celestron
Imaging cameras: 40D Canon
Mounts: CGEM Celestron
Guiding telescopes or lenses: 80mm EON Orion
Guiding cameras: Orion Star Shooter
Focal reducers: 6.3 reducer Celestron
Software: Deep Sky Stacker,  photoshop, Noel’s Tools,  5.00 Images Plus
Resolution: 800×520
Dates: May 8, 2011
Frames: 23×120″
Integration: 0.8 hours
Avg. Moon age: 4.48 days
Avg. Moon phase: 21.07%
RA center: 190.566 degrees
DEC center: 32.495 degrees
Pixel scale: 2.941 arcsec/pixel
Orientation: 119.413 degrees
Field radius: 0.390 degrees
Locations: Leesburg home, Leesburg , Florida, United States
Author: AlBroxton

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NGC 4631 and NGC 4656

14 апр

On this image you’ll find two neighbour galaxies in the constellation Canes Venatici: NGC 4631 (Whale Galaxy), to the left; and NGC 4656 (Hockey Stick or Crowbar Galaxy) – to the right.

NGC 4631 (Whale Galaxy ) – is an edge-on spiral galaxy. This galaxy’s slightly distorted wedge shape gives it the appearance of a herring or a whale, hence its nickname. Because this nearby galaxy is seen edge-on from Earth, professional astronomers observe this galaxy to better understand the gas and stars located outside the plane of the galaxy. It’s size is close the size of our Milky Way. NGC 4656 is a Luminous Blue Variable in “super-outburst” which was discovered in NGC 4656/57 by Doug Rich on March 21, 2005.

This image was made using the piggyback method, when the camera is being put on top of the telescope. In this case telescope is needed only for tracing the object. Equipment used for photoshoot is Canon T3i + Sigma 150/500 APO “300 mm”.

Автор: Fabien Tremblay

SPONLI is a project about astrophotography, for amateur astronomers.

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https://en.sponli.com/registration/