Tài liệu tham khảo WikiPedia: NGC_6287 http://cseligman.com/text/atlas/ngc62a.htm#6287 http://ned.ipac.caltech.edu/cgi-bin/objsearch?objn... http://spider.seds.org/ngc/revngcic.cgi?NGC6287 http://spider.seds.org/spider/MWGC/n6287.html https://in-the-sky.org/data/object.php?id=5054
