Standard minimalist processing.
From
GalaxyMap:No significant references appear in the scientific literature for this nebula, which lies in the approximate direction of the star cluster NGC 6664 and can be seen in hydrogen-alpha as the brightest portion of a much larger nebula at the edge of the Sct OB2 association. The hottest star in the direction of this diffuse nebula is the O6 class HD 172275[color=#ffffff].[/color]
GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>
There are 313 Sh2 objects. As of the date of this image I had imaged 296 (95%).
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 images 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 6 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. There are still 11 low ones between Sh2 30-50 that I can do this summer.
These 17 remaining all are in Expert Scheduler waiting for them to pass by.
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:
Sharpless2Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171Please note there is also a Sharpless2 Group with now more than 1500 examples.
Sharpless2 GroupOther useful links include:
Gary Imm's CollectionGalaxyMap's CollectionThe Sharpless CatalogThe MDW H-alpha Sky SurveyReiner Vogel's detailed observing catalogHope you enjoy these obscure but interesting objects...
Comments