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Post Info TOPIC: NGC7031, NGC7086


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Posts: 131433
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NGC 7031
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NGC 7031 (also OCL 210) is a magnitude +9.1 open cluster located 2935 light-years away in the constellation Cygnus.
The brightest central star is magnitude +11.3

The cluster was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 21 September 1788.

Right Ascension 21h 07m 12.5s, Declination +50 52' 12"

NGC 7031



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Posts: 131433
Date:
NGC7031, NGC7086
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Title: BV photometry of a possible open star cluster pair NGC 7031/NGC 7086
Authors: Valentin Kopchev, Georgy Petrov

We present a CCD BV photometry of the possible binary open star cluster NGC 7031/NGC 7086. The aim is to confirm or disprove their common nature on the grounds of their age and distance. An age of 224 25 Myr and distance 831 72 pc was determined for NGC 7031 and 178 25 Myr, 955 84 pc for NGC 7086, respectively. Based on these differences in age and distance we conclude that the two clusters are most likely not formed together from one and the same Giant Molecular Cloud and thus are not a true binary cluster.

Read more (237kb, PDF)

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