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Epic exoplanet 63 EP

K2-288 B b

RA 55.4443° · Dec 18.2685° · exoplanet

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Score breakdown

· 5 badges
63 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Two suns in its sky +12
  • Super-Earth +8
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
Total score 63

15 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Super-Earth · +8
  • Orbits a red dwarf · +8
  • Two suns in its sky · +12

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.

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.
  • 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.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 13.9 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 November — that's when to go looking.

Properties

density gcc
3.42
diameter km
24236.78
discovery facility
K2
discovery method
Transit
discovery year
2018
dist ly
214.0033
eq temp k
226.36
habitable zone
yes
host star teff
3341
inclination
89.81
insolation
0.4368
mag
13.868
mass earth
4.27
multi star system
yes
name
K2-288 B b
orbital period days
31.3935
radius earth
1.9
semi major au
0.164
spect
M3 V
sys num planets
1
sys num stars
2

About K2-288 B b

K2-288 B b is an epic exoplanet. It lies about 214 light-years from Earth, shines at apparent magnitude 13.87, has spectral type M3 V and has an equilibrium temperature near 226 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 13.87, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-288 B 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 K2-288 B b is an epic exoplanet

K2-288 B b scores 63 points on Spacedle's rarity scale, which places it in the epic tier. Another 15 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Super-Earth, Orbits a red dwarf and Two suns in its sky — 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.