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Rare exoplanet 46 EP

Kepler-1855 b

RA 283.4019° · Dec 41.5162° · exoplanet

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Score breakdown

· 5 badges
46 pts · Rare
Rare 50 pts → Epic
  • Earth-sized +16
  • Ultra-short period +14
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Found by Kepler +3
Total score 46

4 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • Ultra-short period · +14
  • Found by Kepler · +3
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Earth-sized. Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

Hard to believe

  • A year in a day. Its entire year is over in 17.5 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.

Find it in the sky

  • How to spot it. At magnitude 16.6 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.

Standing on it

  • A year here. A full year lasts just 0.7 Earth days.

Properties

density gcc
5.99
diameter km
15514.1542
discovery facility
Kepler
discovery method
Transit
discovery year
2021
eccentricity
0
eq temp k
849
host star teff
3460
inclination
88.7
insolation
86.97
mag
16.556
mass earth
1.96
name
Kepler-1855 b
orbital period days
0.7273
radius earth
1.2162
semi major au
0.0115
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Kepler-1855 b

Kepler-1855 b is a rare exoplanet. It shines at apparent magnitude 16.56, has an equilibrium temperature near 849 K, spans roughly 1.22 Earth radii and weighs about 1.96 Earth masses.

Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

How to see it

At apparent magnitude 16.56, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-1855 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 Kepler-1855 b is a rare exoplanet

Kepler-1855 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 5 science badges — Confirmed exoplanet, Earth-sized, Ultra-short period, Found by Kepler 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.