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Uncommon exoplanet 30 EP

HD 141004 b

RA 236.6099° · Dec 7.3528° · exoplanet

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Score breakdown

· 4 badges
30 pts · Uncommon
Uncommon 34 pts → Rare
  • Its star is visible to the naked eye +12
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 30

4 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Its star is visible to the naked eye · +12
  • Orbits a Sun-like star · +8

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 4.4 you can see it with your own eyes from a dark site.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 677.2 thousand years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.4
diameter km
48090.874
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2021
dist ly
38.5347
eccentricity
0.16
eq temp k
950.73
host star teff
5885.38
insolation
144.73
mag
4.4154
mass earth
13.6348
name
HD 141004 b
orbital period days
15.5083
radius earth
3.77
semi major au
0.1238
spect
G0Vvar
sys num planets
1
sys num stars
1

About HD 141004 b

HD 141004 b is an uncommon exoplanet. It lies about 38.5 light-years from Earth, shines at apparent magnitude 4.42, has spectral type G0Vvar and has an equilibrium temperature near 951 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 4.42, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 141004 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 141004 b is an uncommon exoplanet

HD 141004 b scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Its star is visible to the naked eye and Orbits a Sun-like star — 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.