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Uncommon exoplanet 26 EP

GJ 1151 c

RA 177.7305° · Dec 48.3732° · exoplanet

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Score breakdown

· 4 badges
26 pts · Uncommon
Uncommon 34 pts → Rare
  • Frozen world +8
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 26

8 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Frozen world · +8
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

What it actually is

  • 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.

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 13.8 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around March — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 460.6 thousand years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.7
diameter km
41457.65
discovery facility
Multiple Facilities
discovery method
Radial Velocity
discovery year
2023
dist ly
26.2107
eq temp k
88.3
host star teff
3280
insolation
0.0102
mag
13.76
mass earth
10.62
name
GJ 1151 c
orbital period days
389.7
radius earth
3.25
semi major au
0.5714
spect
M 4.5V
sys num planets
1
sys num stars
1

About GJ 1151 c

GJ 1151 c is an uncommon exoplanet. It lies about 26.2 light-years from Earth, shines at apparent magnitude 13.76, has spectral type M 4.5V and has an equilibrium temperature near 88 K.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 13.76, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GJ 1151 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 1151 c is an uncommon exoplanet

GJ 1151 c scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Frozen world and Orbits a red dwarf — 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.