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Trash exoplanet 13 EP

TOI-1899 b

RA 299.4268° · Dec 40.1433° · exoplanet

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Score breakdown

· 3 badges
13 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 13

2 more points to reach Common.

Badges

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

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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 14.9 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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 July — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.85
diameter km
141554.1596
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2020
dist ly
418.9082
eccentricity
0.044
eq temp k
378
host star teff
3926
inclination
89.64
insolation
3.4
mag
14.88
mass earth
212.945
name
TOI-1899 b
orbital period days
29.0903
radius earth
11.0969
semi major au
0.1525
spect
M0
sys num planets
1
sys num stars
1

About TOI-1899 b

TOI-1899 b is a trash exoplanet. It lies about 418.9 light-years from Earth, shines at apparent magnitude 14.88, has spectral type M0 and has an equilibrium temperature near 378 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 14.88, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-1899 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-1899 b is a trash exoplanet

TOI-1899 b scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant 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.