Sh 2-228
h II region in the constellation Auriga
Sh 2-228 (also known as LBN 784) is a compact H II region located in the constellation of Auriga. It is part of the Sharpless catalog of 313 H II regions compiled by American astronomer Stewart Sharpless. The region is believed to split off from the end of a long filamentary cloud roughly 3 million years ago. It is made up of an optical nebula with a compact infrared point source in the center. It is believed to contain a very massive star ALS 19710, which has an intrinsic spectral class of O8V–B0V but is significantly reddened due to extinction by the nebula. Sh 2-228 is located near an infrared star cluster [IBP2002] CC 01 (also known as CC 01), a young open cluster with an estimated mass of about 1800 M☉; the cluster was likely formed by a shock front from Sh 2-228.
The public source identifies “Sh 2-228” as h II region in the constellation Auriga. This brief keeps that definition visible, then builds a research path around 2-228, region and constellation.
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This entry incorporates text from “Sh 2-228” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.