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Uncommon exoplanet 32 EP

HD 108236 f

RA 186.5741° · Dec -51.3631° · exoplanet

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Score breakdown

· 4 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Richly packed system +14
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 32

2 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Richly packed system · +14
  • 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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • Crowded system. One of at least 5 planets orbiting its star.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 9.2 you'll want a small backyard telescope.
  • 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 March — that's when to go looking.

Could we get there?

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

Properties

density gcc
3.16
diameter km
25729.2554
discovery facility
CHaracterising ExOPlanets Satellite (CHEOPS)
discovery method
Transit
discovery year
2021
dist ly
210.6896
eccentricity
0.051
eq temp k
609.59
host star teff
5660
inclination
88.963
insolation
22.9084
mag
9.25
mass earth
4.72
name
HD 108236 f
orbital period days
29.5411
radius earth
2.017
semi major au
0.1758
spect
G3 V
sys num planets
5
sys num stars
1

About HD 108236 f

HD 108236 f is an uncommon exoplanet. It lies about 210.7 light-years from Earth, shines at apparent magnitude 9.25, has spectral type G3 V and has an equilibrium temperature near 610 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 9.25, a small backyard telescope will bring it into view.

Like any astronomical target, HD 108236 f 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 108236 f is an uncommon exoplanet

HD 108236 f scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Richly packed system 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.