Anomaly exoplanet 73 EP

HD 87816 c

RA 151.5297° · Dec -52.1879° · exoplanet

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Score breakdown

· 6 badges

73 pts · Anomaly

Anomaly 95 pts → Mythic

In the habitable zone +30
Denser than iron +18
Long-period world +10
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 73

22 more points to reach Mythic.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Gas giant · +4
Long-period world · +10
Denser than iron · +18
Multi-planet system · +6

Trivia

What makes it special

Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist.
Heavyweight. Packed denser than solid iron.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 7.6 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 678.5 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 4345 years in a starship at a tenth of light speed.
Distance. 435 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1591.

Saying hello

Say hello. A radio message and its reply would take 869 years round-trip.

Standing on it

A year here. A full year lasts about 20.8 Earth years.

By the numbers

Size. About 12.4× the width of Earth.
Volume. About 1907 Earths could fit inside it.
Mass. Roughly 3878× Earth's mass — about 12.2 Jupiters.
Your weight. You'd weigh about 25.2× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. A frigid -46°C — colder than dry ice.

How we found it

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

Cosmic context

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

Properties

density gcc: 11.2
discovery facility: La Silla Observatory
discovery method: Radial Velocity
dist ly: 434.5474
eccentricity: 0.19
eq temp k: 226.65
habitable zone: yes
insolation: 0.4396
mass earth: 3877.5066
name: HD 87816 c
orbital period days: 7596
radius earth: 12.4
sys num planets: 2

About HD 87816 c

HD 87816 c is an anomaly exoplanet. It lies about 434.5 light-years from Earth, has an equilibrium temperature near 227 K, spans roughly 12.4 Earth radii and weighs about 3,877.51 Earth masses.

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

How to see it

Like any astronomical target, HD 87816 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 HD 87816 c is an anomaly exoplanet

HD 87816 c scores 73 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 22 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Long-period world, Denser than iron and Multi-planet 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.