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Rare exoplanet 46 EP

TOI-849 b

RA 28.7158° · Dec -29.4217° · exoplanet

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Score breakdown

· 6 badges
46 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Ultra-short period +14
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Blasted by starlight +4
  • Found by TESS +4
Total score 46

4 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Lava world · +14
  • Ultra-short period · +14
  • Blasted by starlight · +4
  • Found by TESS · +4

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

Hard to believe

  • A year in a day. Its entire year is over in 18.4 hours. Birthdays here would come round faster than meals.

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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

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.
  • 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 October — that's when to go looking.

Properties

density gcc
5.6
diameter km
46432.568
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2020
dist ly
736.245
eccentricity
0
eq temp k
1932
host star teff
5257
inclination
86.8
insolation
2314.06
mag
11.981
mass earth
41.8
name
TOI-849 b
orbital period days
0.7655
radius earth
3.64
semi major au
0.0155
spect
G
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-849 b

TOI-849 b is a rare exoplanet. It lies about 736.2 light-years from Earth, shines at apparent magnitude 11.98, has spectral type G and has an equilibrium temperature near 1,932 K.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 11.98, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-849 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-849 b is a rare exoplanet

TOI-849 b scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Sub-Neptune, Lava world, Ultra-short period, Blasted by starlight 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.