NGC 6210 (another designation - PK 43 + 37.1) is a planetary nebula in the constellation Hercules. The object is located at a distance of 7450 light years from the solar system. The apparent magnitude is 8.8. The aApparent size of the object is 0.35 '.
L = 28 * 600 sec. bin1, RGB = 15 * 900 sec. bin2, Ha = 41 * 900 sec. bin1, OIII = 20 * 600 sec., 33 * 900 sec., bin1
Total - 37.75 hours.
Processing - Pixinsight 1.8, the final processing in Photoshop.
April-May 2019, March-May 2020
NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure about 40 million light-years away in the constellation Coma Berenices. NGC 4725 is a Seyfert Galaxy, suggesting an active galactic nucleus containing a supermassive black hole.
L = 30 * 900 se. bin1, RGB = 13 * 900 sec. bin2, Ha = 13 * 1800 sec . bin2
Total - 23.75 hours.
Pixinsight 1.8 and Photoshop.
april 2019, march-april 2020
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 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.
