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Uncommon exoplanet 23 EP

TOI-1811 b

RA 188.9224° · Dec 27.2144° · exoplanet

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Score breakdown

· 4 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 23

11 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Tidally locked · +10
  • Found by TESS · +4

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. 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 12 you'll want a small backyard telescope.
  • Northern sky. It rides the northern half of the sky — an easier target the further north 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.

Getting there

  • Aboard Voyager 1. ≈ 7.3 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.23
diameter km
142126.0957
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2023
dist ly
418.2298
eccentricity
0.052
eq temp k
962.2
host star teff
4766
inclination
86.48
insolation
55.9743
mag
11.966
mass earth
308.9292
name
TOI-1811 b
orbital period days
3.7131
radius earth
11.1417
semi major au
0.0439
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-1811 b

TOI-1811 b is an uncommon exoplanet. It lies about 418.2 light-years from Earth, shines at apparent magnitude 11.97, has an equilibrium temperature near 962 K and spans roughly 11.14 Earth radii.

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 11.97, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-1811 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 TOI-1811 b is an uncommon exoplanet

TOI-1811 b scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Tidally locked and Found by TESS — 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.