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Rare exoplanet 37 EP

Kepler-407 c

RA 286.0363° · Dec 49.6145° · exoplanet

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Score breakdown

· 6 badges
37 pts · Rare
Rare 50 pts → Epic
  • Frozen world +8
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 37

13 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Frozen world · +8
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • Crowded system. One of at least 2 planets orbiting its star.

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 12.6 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 July — that's when to go looking.

Properties

density gcc
11.8
diameter km
156901.26
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
2014
dist ly
1103.6075
eccentricity
0.2215
eq temp k
146.73
host star teff
5476
insolation
0.0854
mag
12.603
mass earth
4000
name
Kepler-407 c
orbital period days
3000
radius earth
12.3
semi major au
3.2709
spect
G
sys num planets
2
sys num stars
1

About Kepler-407 c

Kepler-407 c is a rare exoplanet. It lies about 1,103.6 light-years from Earth, shines at apparent magnitude 12.6, has spectral type G and has an equilibrium temperature near 147 K.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 12.6, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-407 c 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 Kepler-407 c is a rare exoplanet

Kepler-407 c scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Frozen world, Multi-planet system 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.