Common exoplanet 21 EP

HD 160691 c

RA 266.0362° · Dec -51.8349° · exoplanet

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Score breakdown

· 3 badges

21 pts · Common

Common 24 pts → Uncommon

Long-period world +10
Multi-planet system +6
Confirmed exoplanet +5

Total score 21

3 more points to reach Uncommon.

Badges

Confirmed exoplanet · +5
Long-period world · +10
Multi-planet system · +6

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 894 thousand years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 79.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 509 years in a starship at a tenth of light speed.
Distance. 50.9 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1975.

Saying hello

Say hello. A radio message and its reply would take 102 years round-trip.

Standing on it

A year here. A full year lasts about 10.8 Earth years.

By the numbers

Mass. Roughly 1398× Earth's mass — about 4.4 Jupiters.
Temperature. A frigid -116°C — colder than dry ice.

How we found it

Discovery. Found by Anglo-Australian Telescope using the radial velocity method.

Cosmic context

Crowded system. One of at least 4 planets orbiting its star.

Properties

discovery facility: Anglo-Australian Telescope
discovery method: Radial Velocity
dist ly: 50.8741
eccentricity: 0.039
eq temp k: 157.21
insolation: 0.1092
mass earth: 1398.445
name: HD 160691 c
orbital period days: 3947
sys num planets: 4

About HD 160691 c

HD 160691 c is a common exoplanet. It lies about 50.9 light-years from Earth, has an equilibrium temperature near 157 K, weighs about 1,398.44 Earth masses and completes an orbit every 3,947 days.

One of at least 4 planets orbiting its star.

How to see it

Like any astronomical target, HD 160691 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 160691 c is a common exoplanet

HD 160691 c scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Long-period world 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.