RA 157.3445° · Dec -50.5705° · star
2 more points to reach Uncommon.
HD 91021 is a common variable star. It lies about 664.3 light-years from Earth, sits in the constellation Vel, shines at apparent magnitude 9.6 and has spectral type F3IVp (Sr).
Its spectrum reads F3IVp (Sr) — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 91021 in the constellation Vel. At apparent magnitude 9.6, a small backyard telescope will bring it into view.
Like any astronomical target, HD 91021 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 91021 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 5 science badges — Variable star, 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.