RA 25.9151° · Dec 50.6887° · star
10 more points to reach Common.
Phi Per is a trash variable star. It lies about 718.4 light-years from Earth, sits in the constellation Per, shines at apparent magnitude 4.01 and has spectral type B2Vpe.
Phi Per is a trash variable star worth 5 points across 1 science badge. Explore its facts, badges and place on the sky map, then add it to your dex on Spacedle.
Look for Phi Per in the constellation Per. At apparent magnitude 4.01, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, Phi Per 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.
Phi Per scores 5 points on Spacedle's rarity scale, which places it in the trash tier. Another 10 points would lift it into a rarer tier.
That score comes from 1 science badge — 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.