Standard minimalist processing. This only shows part of the object. To see a good shot of the whole thing, go to this link and get image 264:
http://www.sharplesscatalog.com/sharpless.aspxFrom
GalaxyMap:The combined HII region and supernova remnant Sh 2-264 is called the Angelfish nebula because of its appearance in visual light, or the Lambda Orionis ring because of its appearance in infrared. It is ionised by the O8 III subgiant star
Lambda Orionis, and to a lesser extent, the 11 B stars near to it, which together form the loose star association
Collinder 69, often called the Lam Ori cluster.
The region around Lambda Orionis is dominated by a ring of molecular clouds whose structure can perhaps best be explained by a supernova very close to the star about 1 million years ago. The image shows only a small fragment of Sh 2-264.
This object is impressive at
visual frequencies and astonishing in
infrared, which shows the true extent of the ring of molecular clouds surrounding the HII region.
GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>
There are 313 Sh2 objects. As of the date of this image I had imaged 308 (98%).
Here is the scorecard:
There are 12 too diffuse/large to image well with my set up (Sh2 111, 117, 122, 131, 132, 145, 178, 218, 221, 230, 268 and 310). I have imaged the first 6 of these mostly in the Nikon Wide angle shot referenced below and 178 and 230 as part of other images. I will do the rest at least once as they come into view this year, so I have 4 more of these to do. I missed 303 and 304 last year running out of time. So there are 5 more to do here.
There are 5 that are never above 14 DEG (Sh2 2-6) but as of 7/12/21 I can get these now with pier upgrades and the images are completed as best as I can.
This one (Sh2 43) was the last of the lower ones that I was able to complete on August 3 2021.
The 5 remaining all are in Expert Scheduler waiting for them to pass by. They are all higher elevations.
The first one was taken on December 23, 2013.
Many were taken with my old Tak 180 ED, which had a wide field of view, but was replaced with my Stellarvue 130, which is more narrow field. I have also taken two very wide field HA images with my Nikon D800 and a 50mm lens.
This is my collection:
Sharpless2
Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171
Please note there is also a Sharpless2 Group with now more than 1500 examples.
Sharpless2 Group
Other useful links include:
Gary Imm's Collection
GalaxyMap's Collection
The Sharpless Catalog
The MDW H-alpha Sky Survey
Reiner Vogel's detailed observing catalog
Hope you enjoy these obscure but interesting objects...
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