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Uncommon exoplanet 23 EP

K2-7 b

RA 167.0937° · Dec -1.0659° · exoplanet

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Score breakdown

· 4 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 23

11 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Neptune-like · +4
  • Orbits a Sun-like star · +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. 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 13.5 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 42.3 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.28
diameter km
51474.2398
discovery facility
K2
discovery method
Transit
discovery year
2015
dist ly
2408.8349
eccentricity
0.24
eq temp k
786
host star teff
5700
inclination
89.08
insolation
125
mag
13.453
mass earth
15.3
name
K2-7 b
orbital period days
28.6781
radius earth
4.0352
semi major au
0.1867
sys num planets
1
sys num stars
1

About K2-7 b

K2-7 b is an uncommon exoplanet. It lies about 2,408.8 light-years from Earth, shines at apparent magnitude 13.45, has an equilibrium temperature near 786 K and spans roughly 4.04 Earth radii.

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 13.45, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-7 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 K2-7 b is an uncommon exoplanet

K2-7 b scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Neptune-like and Orbits a Sun-like star — 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.