← Back to dex
Epic exoplanet 54 EP

Kepler-1377 b

RA 289.1954° · Dec 46.6516° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 7 badges
54 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Ultra-short period +14
  • Super-Earth +8
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
  • Found by Kepler +3
Total score 54

24 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Super-Earth · +8
  • Lava world · +14
  • Ultra-short period · +14
  • Blasted by starlight · +4
  • Found by Kepler · +3

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 17.8 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 15.9 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.

Properties

density gcc
5.91
diameter km
15945.25
discovery facility
Kepler
discovery method
Transit
discovery year
2016
dist ly
3738.0739
eccentricity
0
eq temp k
1873
host star teff
5218
inclination
87.91
insolation
2909.21
mag
15.857
mass earth
2.1
name
Kepler-1377 b
orbital period days
0.7409
radius earth
1.25
semi major au
0.0153
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Kepler-1377 b

Kepler-1377 b is an epic exoplanet. It lies about 3,738.1 light-years from Earth, shines at apparent magnitude 15.86, has an equilibrium temperature near 1,873 K and spans roughly 1.25 Earth radii.

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

How to see it

At apparent magnitude 15.86, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-1377 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-1377 b is an epic exoplanet

Kepler-1377 b scores 54 points on Spacedle's rarity scale, which places it in the epic tier. Another 24 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Super-Earth, Lava world, Ultra-short period, Blasted by starlight and Found by Kepler — 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.