RA 283.1737° · Dec -30.7341° · star
11 more points to reach Epic.
HR 7105 is a rare variable star. It lies about 570.2 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 6.64 and has spectral type B7/B8IV.
Its spectrum reads B7/B8IV — 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 7105 in the constellation Sgr. At apparent magnitude 6.64, it is an easy target for binoculars.
Like any astronomical target, HR 7105 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 7105 scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.
That score comes from 8 science badges — Variable star, Toward the galactic centre, On the zodiac, Hot blue B-type star, Subgiant (leaving the main sequence), Blue-white star, Gently variable and A named variable 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.