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Epic exoplanet 53 EP

GJ 3293 b

RA 67.1484° · Dec -25.1713° · exoplanet

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Score breakdown

· 5 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 53

25 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Neptune-like · +4
  • Multi-planet system · +6
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • Crowded system. One of at least 4 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 11.9 you'll want a small backyard telescope.

Properties

density gcc
0.925
diameter km
66204.678
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2015
dist ly
65.8519
eccentricity
0.06
eq temp k
280.54
habitable zone
yes
host star teff
3466
insolation
1.07
mag
11.945
mass earth
23.54
name
GJ 3293 b
orbital period days
30.5987
radius earth
5.19
semi major au
0.1434
spect
M2.5
sys num planets
4
sys num stars
1

About GJ 3293 b

GJ 3293 b is an epic exoplanet. It lies about 65.9 light-years from Earth, shines at apparent magnitude 11.95, has spectral type M2.5 and has an equilibrium temperature near 281 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 11.95, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 3293 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 3293 b is an epic exoplanet

GJ 3293 b scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Neptune-like, 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.