Rare exoplanet 40 EP

HIP 107772 b

RA 327.4977° · Dec -41.2440° · exoplanet

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Score breakdown

· 3 badges

40 pts · Rare

Rare 46 pts → Epic

In the habitable zone +30
Confirmed exoplanet +5
Sub-Neptune +5

Total score 40

6 more points to reach Epic.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Sub-Neptune · +5

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. ≈ 1.4 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 120.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 771 years in a starship at a tenth of light speed.
Distance. 77.1 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1949.

Saying hello

Say hello. A radio message and its reply would take 154 years round-trip.

Standing on it

A year here. A full year lasts just 55.2 Earth days.

By the numbers

Size. About 3.6× the width of Earth.
Volume. About 48.2 Earths could fit inside it.
Mass. About 12.9× the mass of Earth.
Your weight. You'd weigh about 1.0× your Earth weight standing here.
Temperature. A surprisingly temperate 8°C average.

How we found it

Discovery. Found by Multiple Observatories using the radial velocity method.

Properties

density gcc: 1.47
discovery facility: Multiple Observatories
discovery method: Radial Velocity
dist ly: 77.1144
eccentricity: 0.18
eq temp k: 280.92
habitable zone: yes
insolation: 1.163
mass earth: 12.9
name: HIP 107772 b
orbital period days: 55.199
radius earth: 3.64
sys num planets: 1

About HIP 107772 b

HIP 107772 b is a rare exoplanet. It lies about 77.1 light-years from Earth, has an equilibrium temperature near 281 K, spans roughly 3.64 Earth radii and weighs about 12.9 Earth masses.

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

How to see it

Like any astronomical target, HIP 107772 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 HIP 107772 b is a rare exoplanet

HIP 107772 b scores 40 points on Spacedle's rarity scale, which places it in the rare tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, In the habitable zone and Sub-Neptune — 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.