NGC 4631 also known as the Whale Galaxy 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, hence its nickname.[3] 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. NGC 4656/57 is a galaxy located in the constellation Canes Venatici and is sometimes informally called the Hockey Stick Galaxies or the Crowbar Galaxy. The galaxy is a member of the NGC 4631 Group. A Luminous Blue Variable in "super-outburst" was discovered in NGC 4656/57 by Doug Rich on March 21, 2005. 

Location / Dates

Mt Parnon, 12-13 April 2013

Telescope

TS 130/780 Triplet APO f6

Mount

Ioptron IEQ45 EQ Mount

Camera

QHY9 CCD, Temp -25 C

60/230mm Lunatico's Guidescope , QHY5, PHD Guide

Filtres / EXposures

L 12x600 sec bin 1x, RGB  9x300 bin 1x

Total Exposure time

4,5 ~ hours

Software

Nebulosity 3, Deep Sky Stacker, Maxim DL, Pixinshight, Photoshop CS6.