VdB 62, VdB 63, LDN 1622, LDN 1621 and (?)

This star field is situated near the much more famous M78. The two dark nebulae (LDN 1621, smaller, near the left border and LDN 1622, much bigger near the center) are projected onto a complex and extensive emission nebulosity known as Barnard's Loop, inside the molecular cloud complex named Orion B. Both nebulae are believed to be 500 light years away, much closer than the bright red hydrogen nebulae that shine behind them from about 1,600 light years. Other objects on this image are VdB 62 (just right of LDN 1622) and VdB 63 (the smaller yellowish nebula below). Both are reflection nebulae. For clarity there is a mouseover, which shows the objects and their names. There is another object (probably a planetary nebula), which I couldn’t identify. It is missing in all catalogues that I and my friend Vili Popov have checked (including PLN), but is clearly seen on DSS plates (thanks Vili!), which makes hard to believe that this object is not yet catalogued. Its coordinates are approx. RA = 05h 56m 06s, DE = +01° 14’ 05”. Below you can find a magnified crop of this object compared with the corresponding DSS image.

The subframes of this image were acquired in a long period of time (between November 2012 and February 2013) Since in begin of December I had to rotate slightly the camera (in order to improve the balance), the orientation of the subs are different. This explains the double star spikes. The tiny lines at the top left are spikes from the 4.8 mag star 56 Ori, which has produced the slight greenish halo too (above VdB 62, near top border). This image was taken remotely from the remote controlled IRIDA Observatory .

Unidentified object

Technical Details:

Optics: ASA N12 Astrograph at F/3.6
Mount: ASA DDM 85
Camera: SBIG STL-11000M
Filters: Astronomik LRGB filter set
Dates/Times: November 2012 - February 2013
Location: Rozhen, IRIDA Remote Observatory
Exposure Details: L = 290 min, R = 110 min., G = 120 min., B = 130 min.
Subexposures: 10 minutes
Acquisition: CCD Soft
Processing: PixInsight, Photoshop CS

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