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Trash exoplanet 10 EP

GJ 27.1 b

RA 9.9980° · Dec -44.2542° · exoplanet

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Score breakdown

· 2 badges
10 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 10

5 more points to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5

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 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 September — 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. ≈ 1.4 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.46
diameter km
46687.692
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2014
dist ly
76.993
eccentricity
0.08
eq temp k
387.13
host star teff
3542
insolation
2.5488
mag
11.45
mass earth
13
name
GJ 27.1 b
orbital period days
15.819
radius earth
3.66
semi major au
0.101
spect
M0.5 V
sys num planets
1
sys num stars
1

About GJ 27.1 b

GJ 27.1 b is a trash exoplanet. It lies about 77 light-years from Earth, shines at apparent magnitude 11.45, has spectral type M0.5 V and has an equilibrium temperature near 387 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 11.45, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 27.1 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 27.1 b is a trash exoplanet

GJ 27.1 b scores 10 points on Spacedle's rarity scale, which places it in the trash tier. Another 5 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet and Sub-Neptune — 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.