RA 81.3795° · Dec -0.5439° · star
2 more points to reach Uncommon.
HR 1800 is a common star. It lies about 701.4 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 6.55 and has spectral type B9sp....
Its spectrum reads B9sp... — 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 1800 in the constellation Ori. At apparent magnitude 6.55, it is an easy target for binoculars.
Like any astronomical target, HR 1800 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 1800 scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, In Orion's hunting ground, Hot blue B-type star 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.