RA 274.6673° · Dec -42.2884° · star
2 more points to reach Rare.
HR 6839 is an uncommon star. It sits in the constellation CrA, shines at apparent magnitude 6.3 and has spectral type B0.5Ia.
Its spectrum reads B0.5Ia — 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 HR 6839 in the constellation CrA. At apparent magnitude 6.3, it is an easy target for binoculars.
Like any astronomical target, HR 6839 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.
HR 6839 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Hot blue B-type star, Supergiant 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.