RA 45.0207° · Dec -16.0666° · star
3 more points to reach Common.
HD 18721 is a trash star. It lies about 685.2 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 8.16 and has spectral type K1III.
Its spectrum reads K1III — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for HD 18721 in the constellation Eri. At apparent magnitude 8.16, it is an easy target for binoculars.
Like any astronomical target, HD 18721 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 18721 scores 12 points on Spacedle's rarity scale, which places it in the trash tier. Another 3 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Orange K-type star and Giant 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.