RA 331.3798° · Dec -13.7702° · star
5 more points to reach Rare.
HD 209684 is an uncommon star. It lies about 1,342.2 light-years from Earth, sits in the constellation Aqr, shines at apparent magnitude 9.84 and has spectral type B2/B3III.
Its spectrum reads B2/B3III — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
Look for HD 209684 in the constellation Aqr. At apparent magnitude 9.84, a small backyard telescope will bring it into view.
Like any astronomical target, HD 209684 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
HD 209684 scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.
That score comes from 6 science badges — Star, Distant (over 1,000 light-years), On the zodiac, Hot blue B-type star, Giant star and Blue-white star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.