RA 51.6377° · Dec -40.5697° · star
2 more points to reach Uncommon.
HD 21503 is a common star. It sits in the constellation Eri, shines at apparent magnitude 8.42 and has spectral type K4/K5III:.
Its spectrum reads K4/K5III: — 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 21503 in the constellation Eri. At apparent magnitude 8.42, it is an easy target for binoculars.
Like any astronomical target, HD 21503 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 21503 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, Orange K-type star, Giant star and Deep red 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.