Processing:Brief version inspired by a major effort by Peter Goodhew:
Outstanding 19h Version by Peter GoodhewI could not bring myself to do 19h on this as that boils down to 38h in my skys.
Peter has more information on LDû 13.
Various Collections (1 only) for Comparison:The first below was taken 6 years ago with Rob's Astrotech RC10 and a CCD.... for 9h and we saw the small nebula in H-alpha but did not realize it was there until I saw Peter's image.
Sh2 165 H-Alpha (Denoised to show small nebula in lower corner) Basic Information From GalaxyMap:Contains infrared cluster [BDS2003] 46. [[url=
http://galaxymap.org/cat/view/sharpless/165#note_1]1]
Excited by B0V star BD +61 2494. [[url=
http://galaxymap.org/cat/view/sharpless/165#note_2]2]
Notes: 1.
^ Bica, E., Dutra, C. M., Soares, J., et al. (2003). "New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS", Astronomy and Astrophysics, Vol. 404, 223-232. [[url=
http://adsabs.harvard.edu/abs/2003A%26A...404..223B]2003A&A...404..223B]
2.
^ Reich, W. & Braunsfurth, E. (1981). "2.7 GHz observations of the three old supernova remnants CTB1, G116.5+1.1, and G114.3+0.3 with the Effelsberg 100-m telescope", Astronomy and Astrophysics, Vol. 99, 17-26. [[url=
http://adsabs.harvard.edu/abs/1981A%26A....99...17R]1981A&A....99...17R]
Distance Estimates:1600 pc [[url=
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1982ApJS...49..183B]1982ApJS...49..183B]
2020 pc [[url=
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006ApJ...644..214F]2006ApJ...644..214F]
2400 pc +/- 500 [[url=
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1984NInfo..56...59A]1984NInfo..56...59A]
GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>There are 313 Sh2 objects. All now imaged by yours truly. These are basically the Hydrogen Alpha and other ionized nebulae around the edge of the Milky Way.
This is my collection:
Sharpless2Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171Please note there is also a Sharpless2 Group with now more than 3000 examples.
Sharpless2 GroupOther useful links include:
Gary Imm's CollectionGalaxyMap's CollectionThe Sharpless CatalogThe MDW H-alpha Sky SurveyThe Avedisova star formation regions and the Sharpless nebulae TABLEHope you enjoy these obscure but interesting objects...
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