RA 190.3165° · Dec -13.0139° · star
6 more points to reach Rare.
HR 4821 is an uncommon variable star. It lies about 257.4 light-years from Earth, sits in the constellation Crv, shines at apparent magnitude 5.17 and has spectral type F3IV.
Its spectrum reads F3IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HR 4821 in the constellation Crv. At apparent magnitude 5.17, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HR 4821 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 4821 scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Naked-eye visible, Yellow-white F-type star, Subgiant (leaving the main sequence), 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.