RA 47.8555° · Dec 57.9031° · star
4 more points to reach Rare.
HD 19557 is an uncommon variable star. It lies about 1,591 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 7.48 and has spectral type R5.
Its spectrum reads R5 — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.
Look for HD 19557 in the constellation Cas. At apparent magnitude 7.48, it is an easy target for binoculars.
Like any astronomical target, HD 19557 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 19557 scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Distant (over 1,000 light-years), Never sets (northern circumpolar), Deep red star, Gently variable 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.