RA 32.2977° · Dec -16.3392° · exoplanet
6 more points to reach Uncommon.
GJ 3138 d is a common exoplanet. It lies about 92.9 light-years from Earth, shines at apparent magnitude 10.83, has spectral type M0 and has an equilibrium temperature near 152 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 10.83, a small backyard telescope will bring it into view.
Like any astronomical target, GJ 3138 d 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.
GJ 3138 d scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Sub-Neptune and Multi-planet system — 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.