tommy_h Posted September 30, 2018 Report Share Posted September 30, 2018 Hi Collinder 399 (Cr 399) is a random grouping of stars located in the constellation Vulpecula. It is known as Al Sufi's Cluster or Brocchi's Cluster. The brighter members form an asterism also known as the Coathanger. In 1931, Swedish astronomer Per Collinder listed it in his catalogue of open clusters. The group was considered to be a cluster for many years, but a study in 1970 concluded that only 6 of the brightest stars formed an actual cluster. Several independent studies since 1998 have now determined that this object is not a true cluster at all, but rather just a chance alignment of stars. 2-panel mosaic ASA 10" Astrograph ASA 3" Wynne-Corrector ASA DDM60, no guiding Moravian G3-16200 total exposure time: ~19h More data and higher resolution: http://www.distant-lights.at/cr399-2018_08_10.htm Thomas Link to comment Share on other sites More sharing options...
-Amenophis- Posted October 2, 2018 Report Share Posted October 2, 2018 Beautiful ! Link to comment Share on other sites More sharing options...
tommy_h Posted October 9, 2018 Author Report Share Posted October 9, 2018 Thanks for your nice comments! Link to comment Share on other sites More sharing options...
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