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Rare exoplanet 36 EP

HD 136352 d

RA 230.4401° · Dec -48.3188° · exoplanet

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Score breakdown

· 5 badges
36 pts · Rare
Rare 50 pts → Epic
  • Its star is visible to the naked eye +12
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 36

14 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Multi-planet system · +6
  • Its star is visible to the naked eye · +12
  • Orbits a Sun-like star · +8

Trivia

What it actually is

  • What it is made of. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • Crowded system. One of at least 3 planets orbiting its star.

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 5.7 you can see it with your own eyes from a dark site.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • 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. ≈ 841.5 thousand years at Voyager 1's speed (17 km/s).

Properties

density gcc
2.8781
diameter km
32681.3844
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
47.8862
eccentricity
0
eq temp k
431
host star teff
5664
inclination
89.73
insolation
5.74
mag
5.65
mass earth
8.82
name
HD 136352 d
orbital period days
107.245
radius earth
2.562
semi major au
0.425
spect
G4 V
sys num planets
3
sys num stars
1

About HD 136352 d

HD 136352 d is a rare exoplanet. It lies about 47.9 light-years from Earth, shines at apparent magnitude 5.65, has spectral type G4 V and has an equilibrium temperature near 431 K.

Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

How to see it

At apparent magnitude 5.65, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 136352 d 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 136352 d is a rare exoplanet

HD 136352 d scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 14 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Multi-planet system, 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.