Rare exoplanet 35 EP

HD 73256 c

RA 129.0950° · Dec -30.0373° · exoplanet

Loading sky survey…

🌌 View in 3D star map

Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 4 badges

35 pts · Rare

Rare 46 pts → Epic

Denser than iron +18
Frozen world +8
Confirmed exoplanet +5
Gas giant +4

Total score 35

11 more points to reach Epic.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8
Denser than iron · +18

Trivia

What makes it special

Frozen world. A deep-frozen world far from its star's warmth.
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. ≈ 2.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 186.9 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1197 years in a starship at a tenth of light speed.
Distance. 120 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1906.

Saying hello

Say hello. A radio message and its reply would take 239 years round-trip.

Standing on it

A year here. A full year lasts about 7.4 Earth years.

By the numbers

Size. About 12.2× the width of Earth.
Volume. About 1816 Earths could fit inside it.
Mass. Roughly 5085× Earth's mass — about 16 Jupiters.
Your weight. You'd weigh about 34.2× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. A frigid -139°C — colder than dry ice.

How we found it

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

Properties

density gcc: 15.4
discovery facility: La Silla Observatory
discovery method: Radial Velocity
dist ly: 119.7253
eccentricity: 0.16
eq temp k: 133.92
insolation: 0.0511
mass earth: 5085.2545
name: HD 73256 c
orbital period days: 2690
radius earth: 12.2
sys num planets: 1

About HD 73256 c

HD 73256 c is a rare exoplanet. It lies about 119.7 light-years from Earth, has an equilibrium temperature near 134 K, spans roughly 12.2 Earth radii and weighs about 5,085.25 Earth masses.

A deep-frozen world far from its star's warmth.

How to see it

Like any astronomical target, HD 73256 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 73256 c is a rare exoplanet

HD 73256 c scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Frozen world and Denser than iron — 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.