I portrayed the popular Lion Nebula in the nights of 6, 12, 13, 14 with the interference of moon and fog.
In the lower left corner is a rarely imaged object, the PN 102-20.1 (Abell 79) whose
closeup is published separately here in Astrobin.
There is also an object at 22 11 18.5 +55 28 41.3 (approximately at hours 3:00 in the picture) that I have not been able to identify, your help would be appreciated. It is vaguely visible in survey images, while here is absolutely evident. Given the color and the shape I suspect it might be another PN.
21 November 2022 Update:
@Gary Imm solved the case! It is a Planetary Nebula indeed, the
PN G101.5-00.619 December 2022 Update: added revision C, that is a complete reprocessing, based on a drizzle 2x2 integrated image and with the new utility BXT applied in linear state. Stars are improved. Drizzle is necessary to avoid square stars as output of BXT, when dealing with under sampled images like this one.
Picture: PN G101.5-00.6, initially considered an unidentified object in my picture here.
Here follows a good summary taken from Kevin Jardine's galaxymap.org, that is a very nice and systematic source of information.
Sh2-132This giant HII region, is ionized by two WR stars (WR 152 and WR 153) and OB stars in several embedded clusters. WR 153 and an O 8.5 star lie near the middle of the radio shell associated with this nebula.
Available distance estimates locate Sh 2-132 in the Cep OB1 association within the Perseus arm, at 10350 light-years from the earth.
This nebula is also prominent in radio and infrared images.
References:
In the huge Cep OB1 association (which may not be a single association). [1]
This giant HII region is located at a distance of 3.18 kpc and is ionised by two WR stars and several OB stars. HD 211853 (WR 153) and an O 8.5 star lie near the middle of the radio shell associated with this HII region. [2]
In 2010 the Monthly Notices of the Royal Astronomical Society published an issue with several papers on Sh 2-132, making this an unusually well studied HII region.
These included:
A good overall survey of Sh 2-132 [3]
Star clusters in the nebula [4]
The role of WR 152 [5]
Bibliography:
1. ^ Garmany, C. D. & Stencel, R. E. (1992). "Galactic OB associations in the northern Milky Way Galaxy. I - Longitudes 55 deg to 150 deg", Astronomy and Astrophysics Supplement Series, Vol. 94, 211-244. [1992A&AS...94..211G]
2. ^ Harten, R. H., Felli, M., & Tofani, G. (1978). "A study of the radio continuum emission of the giant H II region S 132.", Astronomy and Astrophysics, Vol. 70, 205-211. [1978A&A....70..205H]
3. ^ Vasquez, J., Cappa, C. E., Pineault, S., et al. (2010). "Ionized gas, molecules and dust in Sh2-132", Monthly Notices of the Royal Astronomical Society, Vol. 405, 1976-1986. [2010MNRAS.405.1976V]
4. ^ Saurin, T. A., Bica, E., & Bonatto, C. (2010). "Star clusters in the Sh2-132 complex: clues about the connection between embedded and open clusters", Monthly Notices of the Royal Astronomical Society, Vol. 407, 133-143. [2010MNRAS.407..133S]
5. ^ Cappa, C. E., Vasquez, J., Pineault, S., et al. (2010). "The radio and infrared counterparts of the ring nebula around HD211564", Monthly Notices of the Royal Astronomical Society, Vol. 403, 387-397. [2010MNRAS.403..387C]
Distance estimates
3180 pc [1978A&A....70..205H]
3500 pc +/- 1000 [2010MNRAS.405.1976V]
3540 pc +/- 400 [1984NInfo..56...59A]
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