RA 280.9652° · Dec -16.9416° · star
1 more point to reach Uncommon.
HD 172984 is a common star. It lies about 424.7 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 7.42 and has spectral type A6/A7V.
Its spectrum reads A6/A7V — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
Look for HD 172984 in the constellation Sgr. At apparent magnitude 7.42, it is an easy target for binoculars.
Like any astronomical target, HD 172984 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 172984 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.
That score comes from 5 science badges — Star, Toward the galactic centre, On the zodiac, White A-type star and Main-sequence 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.