RA 171.0716° · Dec -1.5298° · exoplanet
27 more points to reach Anomaly.
HD 99109 b is an epic exoplanet. It lies about 178.7 light-years from Earth, shines at apparent magnitude 9.1, has spectral type G8/K0 IV and has an equilibrium temperature near 239 K.
Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.
At apparent magnitude 9.1, a small backyard telescope will bring it into view.
Like any astronomical target, HD 99109 b 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 99109 b scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 27 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Gas giant and Puffy low-density world — 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.