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Submitted: Sat, 2020-03-28 16:55

NGC 5257 & NGC 5258

Arp 240 is a pair of interacting spiral galaxy located in the constellation Virgo. The two galaxies are listed together as Arp 240 in the Atlas of Peculiar Galaxies. The galaxy on the down is known as NGC 5257, while the galaxy on the up is known as NGC 5258. Both galaxies are distorted by the gravitational interaction, and both are connected by a tidal bridge, as can be seen in images of these galaxies.

L = 20 * 1800 sec. bin1, RGB = 12 * 1000(1100)(1200) sec. bin2

Total - 21.0 hours.

Pixinsight 1.8 and Photoshop.

april 2019, february 2020

NGC 5257 & NGC 5258
Submitted: Sat, 2020-03-14 10:13

NGC 4631

NGC 4631 (also known as the Whale Galaxy or Caldwell 32) is a barred 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.

L = 39 * 900 sec. bin1, RGB = 14 * 1000 sec. bin2, Ha = 12 * 1800 sec. bin1

Total 27.4 hours.

Pixinsight 1.8 and Photoshop.

NGC 4631
Submitted: Sun, 2020-02-09 21:04

NGC 7479

NGC 7479 (also known as Caldwell 44) is a barred spiral galaxy about 105 million light-years away in the constellation Pegasus. It was discovered by William Herschel in 1784.

L = 46 * 360 sec. bin1, RGB = 15 * 240 sec. bin2, Ha = 18 * 1200 sec. bin1

Total - 13.6 hours.

Pixinsight 1.8, Photoshop.

NGC 7479