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Common exoplanet 17 EP

GJ 4276 b

RA 336.3221° · Dec 59.4125° · exoplanet

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Score breakdown

· 3 badges
17 pts · Common
Common 22 pts → Uncommon
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 17

5 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Neptune-like · +4
  • 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. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

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 12.9 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 August — 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. ≈ 1.2 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.21
diameter km
53831.164
discovery facility
Calar Alto Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
69.5893
eccentricity
0.37
eq temp k
363.86
host star teff
3387
insolation
2.9298
mag
12.903
mass earth
16.57
name
GJ 4276 b
orbital period days
13.352
radius earth
4.22
semi major au
0.082
spect
M4.0
sys num planets
1
sys num stars
1

About GJ 4276 b

GJ 4276 b is a common exoplanet. It lies about 69.6 light-years from Earth, shines at apparent magnitude 12.9, has spectral type M4.0 and has an equilibrium temperature near 364 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 12.9, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GJ 4276 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 4276 b is a common exoplanet

GJ 4276 b scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Neptune-like 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.