RA 47.5716° · Dec -34.1118° · star
2 more points to reach Uncommon.
HD 19840 is a common star. It lies about 1,072.9 light-years from Earth, sits in the constellation For, shines at apparent magnitude 8.71 and has spectral type A3III/IV.
Its spectrum reads A3III/IV — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
Look for HD 19840 in the constellation For. At apparent magnitude 8.71, it is an easy target for binoculars.
Like any astronomical target, HD 19840 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 19840 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, Distant (over 1,000 light-years), White A-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.