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Submitted: Thu, 2016-06-16 09:22

M 63

http://www.astrobin.com/252475/C/?nc=user

Messier 63 (also known as M63, NGC 5055, or the Sunflower Galaxy) is a spiral galaxy in the constellation Canes Venatici consisting of a central disc surrounded by many short spiral arm segments. M63 is part of the M51 Group, a group of galaxies that also includes M51 (the 'Whirlpool Galaxy'). M63 is an active galaxy with a LINER nucleus.

M63 was discovered by Pierre Méchain on June 14, 1779. The galaxy was then listed by Charles Messier as object 63 in the Messier Catalogue.

In the mid-19th century, Lord Rosse identified spiral structures within the galaxy, making this one of the first galaxies in which such structure was identified.

In 1971, a supernova with a magnitude of 11.8 appeared in one of the arms of M63.

L = 12 * 1800 sec. bin1, RGB = 10 * 900 sec. bin2, HaOIII = 12 * 1800 sec. bin2.

Total time - 25.5 hours.

Pixinsight 1.8 and Adobe Lightroom.

M 63
Submitted: Mon, 2016-06-06 19:21

M 13

Messier 13 (M13), also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of about 300,000 stars in the constellation of Hercules.

M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.

It is located at right ascension 16h 41.7m and declination +36° 28'. With an apparent magnitude of 5.8, it is barely visible with the naked eye on a very clear night. Its diameter is about 23 arc minutes and it is readily viewable in small telescopes. Nearby is NGC 6207, a 12th magnitude edge-on galaxy that lies 28 arc minutes directly north east. A small galaxy, IC 4617, lies halfway between NGC 6207 and M13, north-northeast of the large globular cluster's center.

M13 is about 145 light-years in diameter, and it is composed of several hundred thousand stars, the brightest of which is a red giant, the variable star V11, with an apparent visual magnitude of 11.95. M13 is 25,100 light-years away from Earth.

R = 12 * 300 sec. bin1, G = 12 * 400 sec. bin1, B = 12 * 600 sec. bin1

Pixinsight 1.8, Photoshop.

M 13
Submitted: Fri, 2016-06-03 20:48

M 102

Messier 102 (also known as M102) is a galaxy listed in the Messier Catalogue that has not been identified unambiguously. Its original discoverer Pierre Méchain later said that it was a duplicate observation of Messier 101, but there are historical and observational reasons to believe that it could be NGC 5866, although other galaxies have been suggested as possible identities.

L = 36 * 600 sec. bin1, RGB = 10 * 900 sec. bin2, HaOIII = 10*1800 sec. bin2, in the each filters.

Total exposition - 23.5 hours

Pixinsight 1.8, Photoshop.

M 102