RA 273.3187° · Dec -39.2544° · star
1 more point to reach Common.
HD 166617 is a trash star. It lies about 635.8 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 7.61 and has spectral type B9IV/V.
Its spectrum reads B9IV/V — 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 166617 in the constellation CrA. At apparent magnitude 7.61, it is an easy target for binoculars.
Like any astronomical target, HD 166617 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 166617 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.
That score comes from 3 science badges — Star, Hot blue B-type star and Subgiant (leaving the main sequence) — 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.