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Uncommon exoplanet 33 EP

GJ 625 b

RA 246.3558° · Dec 54.3034° · exoplanet

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Score breakdown

· 4 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Nearby (<25 ly) +12
  • Super-Earth +8
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
Total score 33

1 more point to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • Super-Earth · +8
  • Orbits a red dwarf · +8

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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 10.1 you'll want a small backyard telescope.
  • 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 May — 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. ≈ 371 thousand years at Voyager 1's speed (17 km/s).

Properties

density gcc
4.68
diameter km
19006.738
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2017
dist ly
21.1104
eccentricity
0.13
eq temp k
335.59
host star teff
3499
insolation
2.0787
mag
10.066
mass earth
2.82
name
GJ 625 b
orbital period days
14.628
radius earth
1.49
semi major au
0.0784
spect
M2
sys num planets
1
sys num stars
1

About GJ 625 b

GJ 625 b is an uncommon exoplanet. It lies about 21.1 light-years from Earth, shines at apparent magnitude 10.07, has spectral type M2 and has an equilibrium temperature near 336 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 10.07, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 625 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.

Why GJ 625 b is an uncommon exoplanet

GJ 625 b scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Nearby (<25 ly), Super-Earth 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.