Rare exoplanet 41 EP

HD 160691 b

RA 266.0362° · Dec -51.8349° · exoplanet

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Score breakdown

· 3 badges

41 pts · Rare

Rare 46 pts → Epic

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

Total score 41

5 more points to reach Epic.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
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.

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 just 645 Earth days.

By the numbers

Mass. Roughly 1367× Earth's mass — about 4.3 Jupiters.
Temperature. A surprisingly temperate -11°C average.

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: 0.0505
eq temp k: 262.13
habitable zone: yes
insolation: 0.8439
mass earth: 1366.6622
name: HD 160691 b
orbital period days: 645
sys num planets: 4

About HD 160691 b

HD 160691 b is a rare exoplanet. It lies about 50.9 light-years from Earth, has an equilibrium temperature near 262 K, weighs about 1,366.66 Earth masses and completes an orbit every 645 days.

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

How to see it

Like any astronomical target, HD 160691 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 HD 160691 b is a rare exoplanet

HD 160691 b scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.

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