Common exoplanet 18 EP

HD 144899 b

RA 242.5721° · Dec -47.9147° · exoplanet

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Score breakdown

· 3 badges

18 pts · Common

Common 24 pts → Uncommon

Eccentric orbit +9
Confirmed exoplanet +5
Neptune-like +4

Total score 18

6 more points to reach Uncommon.

Badges

Confirmed exoplanet · +5
Neptune-like · +4
Eccentric orbit · +9

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 6.6 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 589 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 3772 years in a starship at a tenth of light speed.
Distance. 377 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1649.

Saying hello

Say hello. A radio message and its reply would take 754 years round-trip.

Standing on it

A year here. A full year lasts just 40.4 Earth days.

By the numbers

Size. About 4.8× the width of Earth.
Volume. About 109 Earths could fit inside it.
Mass. About 20.3× the mass of Earth.
Your weight. You'd weigh about 0.9× your Earth weight standing here.
Temperature. Around 498°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by Multiple Observatories using the radial velocity method.

Cosmic context

Wild orbit. Its highly elliptical path swings between scorching and frozen each lap.

Properties

density gcc: 1.03
discovery facility: Multiple Observatories
discovery method: Radial Velocity
dist ly: 377.2483
eccentricity: 0.821
eq temp k: 770.87
insolation: 58.843
mass earth: 20.341
name: HD 144899 b
orbital period days: 40.4391
radius earth: 4.77
sys num planets: 1

About HD 144899 b

HD 144899 b is a common exoplanet. It lies about 377.2 light-years from Earth, has an equilibrium temperature near 771 K, spans roughly 4.77 Earth radii and weighs about 20.34 Earth masses.

Its highly elliptical path swings between scorching and frozen each lap.

How to see it

Like any astronomical target, HD 144899 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 144899 b is a common exoplanet

HD 144899 b scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Neptune-like and Eccentric orbit — 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.