Common exoplanet 18 EP

Kepler-396 c

RA 296.1328° · Dec 48.9773° · exoplanet

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Score breakdown

· 4 badges

18 pts · Common

Common 24 pts → Uncommon

Multi-planet system +6
Confirmed exoplanet +5
Neptune-like +4
Found by Kepler +3

Total score 18

6 more points to reach Uncommon.

Badges

Confirmed exoplanet · +5
Neptune-like · +4
Multi-planet system · +6
Found by Kepler · +3

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 12.8 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.1 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 7298 years in a starship at a tenth of light speed.
Distance. 730 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1296.

Saying hello

Say hello. A radio message and its reply would take 1460 years round-trip.

Standing on it

A year here. A full year lasts just 88.5 Earth days.

By the numbers

Size. About 5.3× the width of Earth.
Volume. About 149 Earths could fit inside it.
Mass. About 17.9× the mass of Earth.
Your weight. You'd weigh about 0.6× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A scorching 117°C on average.

How we found it

Discovery. Found by Kepler using the transit method.

Cosmic context

Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc: 0.661
discovery facility: Kepler
discovery method: Transit
dist ly: 729.7969
eccentricity: 0
eq temp k: 390
insolation: 5.244
mass earth: 17.9
name: Kepler-396 c
orbital period days: 88.505
radius earth: 5.3
sys num planets: 2

About Kepler-396 c

Kepler-396 c is a common exoplanet. It lies about 729.8 light-years from Earth, has an equilibrium temperature near 390 K, spans roughly 5.3 Earth radii and weighs about 17.9 Earth masses.

One of at least 2 planets orbiting its star.

How to see it

Like any astronomical target, Kepler-396 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-396 c is a common exoplanet

Kepler-396 c scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Neptune-like, Multi-planet system and Found by Kepler — 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.