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Common exoplanet 16 EP

GJ 3090 c

RA 20.4384° · Dec -46.7147° · exoplanet

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Score breakdown

· 3 badges
16 pts · Common
Common 22 pts → Uncommon
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 16

6 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Multi-planet system · +6

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. 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.
  • Crowded system. One of at least 2 planets orbiting its star.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 11.4 you'll want a small backyard telescope.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around October — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
1.77
diameter km
40054.468
discovery facility
Multiple Facilities
discovery method
Radial Velocity
discovery year
2026
dist ly
73.3039
eccentricity
0
eq temp k
407.2
host star teff
3707
insolation
4.58
mag
11.403
mass earth
10
name
GJ 3090 c
orbital period days
15.9407
radius earth
3.14
semi major au
0.0997
spect
M2 V
sys num planets
2
sys num stars
1

About GJ 3090 c

GJ 3090 c is a common exoplanet. It lies about 73.3 light-years from Earth, shines at apparent magnitude 11.4, has spectral type M2 V and has an equilibrium temperature near 407 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 11.4, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 3090 c 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.

Why GJ 3090 c is a common exoplanet

GJ 3090 c 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.