Rare exoplanet 43 EP

Kepler-1540 b

RA 283.3446° · Dec 41.2018° · exoplanet

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Score breakdown

· 4 badges

43 pts · Rare

Rare 46 pts → Epic

In the habitable zone +30
Confirmed exoplanet +5
Sub-Neptune +5
Found by Kepler +3

Total score 43

3 more points to reach Epic.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Sub-Neptune · +5
Found by Kepler · +3

Trivia

What makes it special

Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 14 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.2 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 7990 years in a starship at a tenth of light speed.
Distance. 799 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1227.

Saying hello

Say hello. A radio message and its reply would take 1598 years round-trip.

Standing on it

A year here. A full year lasts just 125 Earth days.

By the numbers

Size. About 2.5× the width of Earth.
Volume. About 15.4 Earths could fit inside it.
Mass. About 6.8× the mass of Earth.
Your weight. You'd weigh about 1.1× your Earth weight standing here.
Temperature. A surprisingly temperate -7°C average.

How we found it

Discovery. Found by Kepler using the transit method.

Properties

density gcc: 2.41
discovery facility: Kepler
discovery method: Transit
dist ly: 798.9517
eccentricity: 0
eq temp k: 266
habitable zone: yes
insolation: 0.849
mass earth: 6.76
name: Kepler-1540 b
orbital period days: 125.4131
radius earth: 2.49
sys num planets: 1

About Kepler-1540 b

Kepler-1540 b is a rare exoplanet. It lies about 799 light-years from Earth, has an equilibrium temperature near 266 K, spans roughly 2.49 Earth radii and weighs about 6.76 Earth masses.

Sits where it's neither too hot nor too cold — liquid water could exist.

How to see it

Like any astronomical target, Kepler-1540 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-1540 b is a rare exoplanet

Kepler-1540 b scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Sub-Neptune 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.