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Uncommon exoplanet 26 EP

TOI-1801 b

RA 175.5756° · Dec 23.0270° · exoplanet

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Score breakdown

· 4 badges
26 pts · Uncommon
Uncommon 34 pts → Rare
  • Two suns in its sky +12
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by TESS +4
Total score 26

8 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Found by TESS · +4
  • Two suns in its sky · +12

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.

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 11.6 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. ≈ 1.8 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
3.701
diameter km
26520.1398
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2023
dist ly
100.0634
eccentricity
0
eq temp k
493.7
host star teff
3863
inclination
89.507
insolation
10.7276
mag
11.58
mass earth
5.738
multi star system
yes
name
TOI-1801 b
orbital period days
10.6439
radius earth
2.079
semi major au
0.075
spect
M0.5+/-0.5 V
sys num planets
1
sys num stars
2

About TOI-1801 b

TOI-1801 b is an uncommon exoplanet. It lies about 100.1 light-years from Earth, shines at apparent magnitude 11.58, has spectral type M0.5+/-0.5 V and has an equilibrium temperature near 494 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 11.58, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-1801 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-1801 b is an uncommon exoplanet

TOI-1801 b scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Found by TESS and Two suns in its sky — 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.