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Submitted: Tue, 2018-04-17 14:47

NGC 2903

NGC 2903 is a field barred spiral galaxy about 30 million light-years away in the constellation Leo. It was discovered by William Herschel who cataloged it on November 16, 1784. NGC 2903 has a very high speed of creating new stars in the central region.

L = 34 * 900 sec. bin1, R = 10 * 1000 sec. bin2, G = 10 * 1100 sec. bin2, B = 10 * 1200 sec. bin2, Ha = 12 * 1800 sec. bin2.

Total - 23.7 hours.

Pixinsight 1.8 and Photoshop.

NGC 2903
Submitted: Thu, 2018-04-05 10:44

SH 2-136

The Ghost Nebula (designated Sh2-136 and VdB 141) is a reflection nebula located in the constellation Cepheus. Looking at the adjacent image, the nebula's name is easily understood. The Ghost nebula is referred to as a globule (cataloged CB230) and over 2 light-years across. There are several stars embedded, whose emissions make the nebula shine in brownish color.

L = 17 * 1800 sec. bin1, RGB = 10 * 1000, 1150, 1300 sec. bin2, in each channel.

Total exposition - 18.1 hours.

Pixinsight 1.8, Photoshop.

SH 2-136
Submitted: Mon, 2018-03-26 10:23

NGC 3718 & NGC 3729

https://www.astrobin.com/339119/?nc=iotd

NGC 3718 and NGC 3729 - galaxy in the constellation Ursa Major.

The most striking is NGC 3718, the warped spiral galaxy. NGC 3718's spiral arms look twisted and extended, mottled with young blue star clusters. Drawn out dust lanes obscure its yellowish central regions. A mere 150 thousand light-years is another large spiral galaxy, NGC 3729. The two are likely interacting gravitationally, accounting for the peculiar appearance of NGC 3718. While this galaxy pair lies about 52 million light-years away, the remarkable Hickson Group 56 can also be seen clustered above NGC 3718. Hickson Group 56 consists of five interacting galaxies and lies over 400 million light-years away.

NGC 3718 and NGC 3729 was discovered by John Herschel in 1828 and 1782 years.

L = 37 * 900 sec. bin1, Ha = 10 * 1800 sec, RGB = 10 * 900 sec. bin2, in the each channel.

Total exposition - 21.75 hours.

Pixinsight 1.8 and Photoshop.

NGC 3718 & NGC 3729