RA 281.1426° · Dec -42.5771° · star
3 more points to reach Uncommon.
HD 172877 is a common star. It lies about 988.4 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 8.33 and has spectral type B9IV.
Its spectrum reads B9IV — 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 172877 in the constellation CrA. At apparent magnitude 8.33, it is an easy target for binoculars.
Like any astronomical target, HD 172877 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 172877 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Hot blue B-type star, Subgiant (leaving the main sequence) 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.