RA 45.0443° · Dec -20.8027° · exoplanet
6 more points to reach Common.
HD 18742 b is a trash exoplanet. It lies about 530.6 light-years from Earth, shines at apparent magnitude 7.81, has spectral type G8/K0 IV and has an equilibrium temperature near 400 K.
Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
At apparent magnitude 7.81, it is an easy target for binoculars.
Like any astronomical target, HD 18742 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 18742 b scores 9 points on Spacedle's rarity scale, which places it in the trash tier. Another 6 points would lift it into a rarer tier.
That score comes from 2 science badges — Confirmed exoplanet and Gas giant — 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.