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Common exoplanet 21 EP

TOI-1227 b

RA 186.7674° · Dec -72.4519° · exoplanet

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Score breakdown

· 4 badges
21 pts · Common
Common 22 pts → Uncommon
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 21

1 more point to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Found by TESS · +4
  • Orbits a red dwarf · +8

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 17 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • 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
0.417
diameter km
122108.3357
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2022
dist ly
328.2467
eq temp k
243.77
host star teff
3072
inclination
88.571
insolation
3.21
mag
16.999
mass earth
66.5
name
TOI-1227 b
orbital period days
27.364
radius earth
9.5725
semi major au
0.0886
spect
M4.5V-M5V
sys num planets
1
sys num stars
1

About TOI-1227 b

TOI-1227 b is a common exoplanet. It lies about 328.2 light-years from Earth, shines at apparent magnitude 17, has spectral type M4.5V-M5V and has an equilibrium temperature near 244 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 17, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-1227 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-1227 b is a common exoplanet

TOI-1227 b scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Found by TESS and Orbits a red dwarf — 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.