Nebulas

M 76

The Little Dumbbell Nebula, also known as Messier 76, NGC 650/651, the Barbell Nebula, or the Cork Nebula, is a planetary nebula in the constellation Perseus. It was discovered by Pierre Méchain in 1780 and included in Charles Messier's catalog of comet-like objects as number 76. It was first recognised as a planetary nebula in 1918 by the astronomer Heber Doust Curtis. However, there is some contention to this claim, as Isaac Roberts in 1891 did suggest that M76 might be similar to the Ring Nebula (M57), being instead as seen from the side view. The structure is now classed as a bipolar planetary nebula (BPNe).

Distance to M76 is currently estimated as 780 parsecs or 2,500 light years, making the average dimensions about 0.378 pc. (1.23 ly.) across.

L = 18 * 1200 sec. bin1, RGB = 10 * 900 sec. bin2, HaOIII = 12 * 1200 sec. bin2, ineach filters.

Total exposition - 21.5 hours.

M 76

NGC 1579

NGC 1579 (also known as the Northern Trifid) is a diffuse nebula located in the constellation of Perseus. It is referred to as the Northern Trifid because of its similar appearance to the Trifid Nebula, which is located in the southern celestial hemisphere of the sky. It is a H II region, a region of star formation.

L = 17 * 1200 sec. bin1, RGB = 9 * 900 sec. bin2, in each filters.

Total exposition - 12.4 hours

NGC 1579

SH 2-106

Sh2-106 is an emission nebula and a star formation region in the constellation Cygnus. It is a H II region estimated to be around 2,000 ly (600 pc) from Earth, in an isolated area of the Milky Way.

In the center of the nebula is a young and massive star that emits jets of hot gas from its poles, forming the bipolar structure. Dust surrounding the star is also ionized by the star. The nebula spans about 2 light-years across.

L = 16 * 1800 sec. bin1, RGB = 10 * 1200 sec. bin2, HaOIII = 10 * 1200 sec. bin2, in the each filters.

Total exposition - 24.5 hours.

SH 2-106

NGC 7023

The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.

L = 19 * 1200 sec. bin1, RGB = 9 * 1200 sec. bin2, HaOIII = 10 * 1200 sec. bin2, in each filters.

Total exposition - 22 hours

NGC 7023