RA 264.2655° · Dec -20.7093° · star
9 more points to reach Common.
HD 159721 is a trash star. It lies about 618.9 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 9.95 and has spectral type K0.
Its spectrum reads K0 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for HD 159721 in the constellation Oph. At apparent magnitude 9.95, a small backyard telescope will bring it into view.
Like any astronomical target, HD 159721 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 159721 scores 6 points on Spacedle's rarity scale, which places it in the trash tier. Another 9 points would lift it into a rarer tier.
That score comes from 2 science badges — Star and Orange K-type 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.