RA 77.9223° · Dec 0.5146° · star
15 more points to reach Epic.
HR 1690 is a rare variable star. It lies about 1,284.1 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 6.68 and has spectral type B9Vn.
Its spectrum reads B9Vn — 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 1690 in the constellation Ori. At apparent magnitude 6.68, it is an easy target for binoculars.
Like any astronomical target, HR 1690 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 1690 scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 15 points would lift it into a rarer tier.
That score comes from 8 science badges — Variable star, Distant (over 1,000 light-years), In Orion's hunting ground, Hot blue B-type star, Main-sequence star, Blue-white star, Barely variable (under 0.05 mag) 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.