RA 41.4918° · Dec -64.3967° · star
4 more points to reach Common.
HD 17557 is a trash star. It lies about 644.6 light-years from Earth, sits in the constellation Hor, shines at apparent magnitude 9.23 and has spectral type F5IV/V.
Its spectrum reads F5IV/V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 17557 in the constellation Hor. At apparent magnitude 9.23, a small backyard telescope will bring it into view.
Like any astronomical target, HD 17557 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 17557 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Yellow-white F-type star and Subgiant (leaving the main sequence) — 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.