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Uncommon exoplanet 33 EP

Kepler-517 b

RA 293.6755° · Dec 41.2952° · exoplanet

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Score breakdown

· 5 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Two suns in its sky +12
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by Kepler +3
Total score 33

1 more point to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Found by Kepler · +3
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

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 12.4 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.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 16.6 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
2.2
diameter km
34059.054
discovery facility
Kepler
discovery method
Transit
discovery year
2016
dist ly
945.5491
eccentricity
0
eq temp k
467
host star teff
5690
inclination
89.99
insolation
10.555
mag
12.372
mass earth
7.61
multi star system
yes
name
Kepler-517 b
orbital period days
60.9283
radius earth
2.67
semi major au
0.2868
sys num planets
1
sys num stars
2

About Kepler-517 b

Kepler-517 b is an uncommon exoplanet. It lies about 945.5 light-years from Earth, shines at apparent magnitude 12.37, has an equilibrium temperature near 467 K and spans roughly 2.67 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 12.37, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-517 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 Kepler-517 b is an uncommon exoplanet

Kepler-517 b scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Found by Kepler, Orbits a Sun-like star 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.