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Добавлено: 05.09.2017 - 09:55

NGC 4490, also known as the Cocoon Galaxy, is a barred spiral galaxy in the constellation Canes Venatici. It lies at a distance of 25 million light years from Earth. It interacts with its smaller companion NGC 4485 and as a result is a starburst galaxy.

NGC 4490 is located 3/4° northwest of beta Canum Venaticorum and with apparent visual magnitude 9.8, can be observed with 15x100 binoculars. It is a member of Herschel 400 Catalogue. It belongs in Canes Venatici galaxy cloud II.

It was discovered by William Herschel in 1788. Two supernovae have been observed in NGC 4490, SN 1982F, and type II-P SN 2008ax, with peak magnitude 16.1.

Добавлено: 16.08.2017 - 11:17

Messier 12 or M 12 (also designated NGC 6218) is a globular cluster in the constellation of Ophiuchus. It was discovered by the French astronomer Charles Messier on May 30, 1764, who described it as a "nebula without stars".

R = 11 * 400 sec. bin1, G = 11 * 460 sec. bin1, B = 11 * 560 sec. bin1.

PixInsight 1.8, Photoshop CC

M 5

Добавлено: 15.08.2017 - 13:43

Messier 5 or M5 (also designated NGC 5904) is a globular cluster in the constellation Serpens.

M5 was discovered by the German astronomer Gottfried Kirch in 1702 when he was observing a comet. Charles Messier also noted it in 1764, but thought it a nebula without any stars associated with it. William Herschel was the first to resolve individual stars in the cluster in 1791, counting roughly 200.

R = 9 * 600 sec. bin1, G = 9 * 700 sec. bin1, B = 9 * 800 sec. bin1.

PixInsight 1.8, Photoshop CC

Добавлено: 25.04.2017 - 09:45

Messier 14 (also known as M14 or NGC 6402) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier in 1764.

At a distance of about 30,000 light-years, M14 contains several hundred thousand stars. At an apparent magnitude of +7.6 it can be easily observed with binoculars. Medium-sized telescopes will show some hint of the individual stars of which the brightest is of magnitude +14.

The total luminosity of M14 is in the order of 400,000 times that of the Sun corresponding to an absolute magnitude of -9.12. The shape of the cluster is decidedly elongated. M14 is about 100 light-years across.

R = 9 * 400 sec. bin1, G = 9 * 480 sec. bin1, B = 9 * 560 sec. bin1.

Pixinsight 1.8, Photoshop.