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Rare exoplanet 34 EP

GJ 433 b

RA 173.8619° · Dec -32.5436° · exoplanet

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Score breakdown

· 5 badges
34 pts · Rare
Rare 50 pts → Epic
  • Tidally locked +10
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 34

16 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Tidally locked · +10
  • Multi-planet system · +6
  • 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. 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 3 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 9.8 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 March — that's when to go looking.

Could we get there?

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

Properties

density gcc
2.63
diameter km
29721.946
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2013
dist ly
29.5646
eccentricity
0.04
eq temp k
473.94
host star teff
3461
insolation
5.2029
mag
9.81
mass earth
6.043
name
GJ 433 b
orbital period days
7.3705
radius earth
2.33
semi major au
0.062
spect
M2V
sys num planets
3
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About GJ 433 b

GJ 433 b is a rare exoplanet. It lies about 29.6 light-years from Earth, shines at apparent magnitude 9.81, has spectral type M2V and has an equilibrium temperature near 474 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 9.81, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 433 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 433 b is a rare exoplanet

GJ 433 b scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Tidally locked, Multi-planet system 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.