CTB1, Supernova remnant

This really faint object is also known as Abell 85 or as SNR G116.9+00.1. It's located in constellation Cassiopeia. (Ra 23:58:53.5 Dec +62:30:28)

Abell 85 is an large, filamentary supernova remnant with shell-like structure similar to Cygnus Loop. Unlike the Cygnus Loop, the majority of CTB1's optical light emission is in the HII spectrum, with only a small component of OIII emission. (deepskypedia)

This is a frustrating target!! Extremely faint and now located low in the Norhern sky. I have plans to continue with this one but the next possible time is in late August when it's dark again and this will be higher in the sky.

Here's 7h 30min of Hydrogen-alpha taken with 30min subs.

PK 164+31.1

Jones-Emberson 1 (PK 164+31.1) is a 14th magnitude planetary nebula in the constellation Lynx at a distance of 1600 light years. It is a larger planetary with low surface brightness. The 16.8-magnitude central star is very blue white dwarf.

Here's 8h 50min of exposure with HaLRGB. There's only 1h 40min of luminance so the background galaxies is not quite well visible. But I think I'm done with this one...

Full size in Astrobin.

M36

Another open cluster taken to fill the empty gap between main targets...

Open Cluster M36 (also known as Messier Object 36, Messier 36, M36, or NGC 1960) is an open cluster in the Auriga constellation. It was discovered by Giovanni Batista Hodierna before 1654. M36 is at a distance of about 4,100 light years away from Earth and is about 14 light years across. There are at least sixty members in the cluster. (wikipedia)

This cluster has a size of 12 arcmin and magnitude of 6.3.

Here's 2 hours total exposure of RGB (RG=6*300" and B=12*300").

Polar ring galaxy NGC2685 Finalized

A polar-ring galaxy is a type of galaxy in which an outer ring of gas and stars rotates over the poles of the galaxy. These polar rings are thought to form when two galaxies gravitationally interact with each other. One possibility is that a material is tidally stripped from a passing galaxy to produce the polar ring seen in the polar-ring galaxy. The other possibility is that a smaller galaxy collides orthogonally with the plane of rotation of the larger galaxy, with the smaller galaxy effectively forming the polar-ring structure. (wikipedia)

This is my version of this mag 11.2 object (4.6*2.5 arcmin)

I'm not totally happy with the colors (or lack of them) so I may reprocess this later.

Total exposure is 10h 40min:
                                              L    = 25*1200"
                                              RG = 8*300"
                                              B    = 8*450"

And here's 100% crop of the galaxy.

Bigger one again in Astrobin

NGC2403 L(HaR)GB

NGC 2403 (also Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. NGC 2403 is an outlying member of the M81 Group, and is approximately 8 million light-years distant. It bears a striking similarity to M33, being about 50,000 light years in diameter and containing numerous star-forming H II regions. The northern spiral arm connects it to nearby galaxy NGC 2404. (wikipedia)

Galaxy has a size of 21.9*12.3 arcmin and magnitude of 8.9.

Total exposure is 7h 15min:
                      L    =   13*1200"
                      GB =   8*300"
                      R    =   7*300"
                      Ha  =   3*1200"

IC342, The Hidden Galaxy L(HaR)GB

IC 342 (also known as Caldwell 5) is an intermediate spiral galaxy in the constellation Camelopardalis. The galaxy is near the galactic equator where dust obscuration makes it a difficult object for both amateur and professional astronomers to observe, though it can readily be detected even with binoculars. The dust of the Milky Way makes it difficult to determine the precise distance; modern estimates range from about 7 Mly to about 11 Mly.

IC 342 is one of the brightest two galaxies in the IC 342/Maffei Group of galaxies, one of the galaxy groups that is closest to the Local Group. The galaxy was discovered by William Frederick Denning in 1895. Edwin Hubble first thought it to be in the Local Group, but later it was demonstrated that the galaxy is outside the Local Group. (wikipedia)

This galaxy has a size of 21.4*20.9 arcmin with a magnitude of 9.1.

Here's my finalized version of it.

Total exposure: 8h 10 min
                          L   = 4h20min (13 * 1200")
                          Ha = 2h (6*1200")
                          RG = 30 min (6*300")
                          B   = 50 min (10*300")

M103 finalized

Here's the final version of the Messier 103. The open cluster is located in constellation Cassiopeia with a magnitude of 7.4.

This open cluster was discovered in 1781 by Charles Messier's friend and collaborator Pierre Mechain. It's one of the most distant open clusters, with distances of 8000 and 9500 light years from the earth and ranging about 15 light years apart. (wikipedia)

Here's RGB image with 20:20:40 minutes of exposure.

Full size in Astrobin