Epic exoplanet 55 EP

HD 10180 g

RA 24.4731° · Dec -60.5115° · exoplanet

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Score breakdown

· 4 badges

55 pts · Epic

Epic 68 pts → Anomaly

In the habitable zone +30
Richly packed system +14
Multi-planet system +6
Confirmed exoplanet +5

Total score 55

13 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Multi-planet system · +6
Richly packed system · +14

Trivia

What makes it special

Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist.
Packed system. Crammed into a system of five or more planets.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 198.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1271 years in a starship at a tenth of light speed.
Distance. 127 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1899.

Saying hello

Say hello. A radio message and its reply would take 254 years round-trip.

Standing on it

A year here. A full year lasts just 605 Earth days.

By the numbers

Mass. Roughly 3375× Earth's mass — about 10.6 Jupiters.
Temperature. A surprisingly temperate -22°C average.

How we found it

Discovery. Found by La Silla Observatory using the radial velocity method.

Cosmic context

Crowded system. One of at least 6 planets orbiting its star.

Properties

discovery facility: La Silla Observatory
discovery method: Radial Velocity
dist ly: 127.0727
eccentricity: 0.263
eq temp k: 251.27
habitable zone: yes
insolation: 0.7317
mass earth: 3375.3377
name: HD 10180 g
orbital period days: 604.67
sys num planets: 6

About HD 10180 g

HD 10180 g is an epic exoplanet. It lies about 127.1 light-years from Earth, has an equilibrium temperature near 251 K, weighs about 3,375.34 Earth masses and completes an orbit every 604.67 days.

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

How to see it

Like any astronomical target, HD 10180 g 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 HD 10180 g is an epic exoplanet

HD 10180 g scores 55 points on Spacedle's rarity scale, which places it in the epic tier. Another 13 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Multi-planet system and Richly packed system — 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.