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Epic exoplanet 59 EP

HD 3167 b

RA 8.7401° · Dec 4.3807° · exoplanet

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Score breakdown

· 7 badges
59 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Ultra-short period +14
  • Super-Earth +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
Total score 59

19 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Lava world · +14
  • Ultra-short period · +14
  • Multi-planet system · +6
  • Blasted by starlight · +4
  • Orbits a Sun-like star · +8

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 23 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.
  • Crowded system. One of at least 4 planets orbiting its star.

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 9 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.

Properties

density gcc
6.49
diameter km
20422.6762
discovery facility
K2
discovery method
Transit
discovery year
2016
dist ly
154.2388
eccentricity
0
eq temp k
1781
host star teff
5338
inclination
87.8
insolation
1650
mag
8.97
mass earth
4.844
name
HD 3167 b
orbital period days
0.9597
radius earth
1.601
semi major au
0.0181
spect
K0 V
sys num planets
4
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HD 3167 b

HD 3167 b is an epic exoplanet. It lies about 154.2 light-years from Earth, shines at apparent magnitude 8.97, has spectral type K0 V and has an equilibrium temperature near 1,781 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 8.97, it is an easy target for binoculars.

Like any astronomical target, HD 3167 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 HD 3167 b is an epic exoplanet

HD 3167 b scores 59 points on Spacedle's rarity scale, which places it in the epic tier. Another 19 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Super-Earth, Lava world, Ultra-short period, Multi-planet system, Blasted by starlight and Orbits a Sun-like star — 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.