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Epic exoplanet 61 EP

HD 219134 b

RA 348.3372° · Dec 57.1696° · exoplanet

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Score breakdown

· 6 badges
61 pts · Epic
Epic 78 pts → Anomaly
  • Richly packed system +14
  • Nearby (<25 ly) +12
  • Its star is visible to the naked eye +12
  • Tidally locked +10
  • Super-Earth +8
  • Confirmed exoplanet +5
Total score 61

17 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • Super-Earth · +8
  • Tidally locked · +10
  • Richly packed system · +14
  • Its star is visible to the naked eye · +12

Trivia

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 6 planets orbiting its star.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 5.6 you can see it with your own eyes from a dark site.
  • 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 September — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
6.34
diameter km
20435.4324
discovery facility
Roque de los Muchachos Observatory
discovery method
Radial Velocity
discovery year
2015
dist ly
21.3021
eccentricity
0
eq temp k
1015
host star teff
4699
inclination
85.05
insolation
176.2
mag
5.5691
mass earth
4.74
name
HD 219134 b
orbital period days
3.0929
radius earth
1.602
semi major au
0.0388
spect
K3 V
sys num planets
6
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HD 219134 b

HD 219134 b is an epic exoplanet. It lies about 21.3 light-years from Earth, shines at apparent magnitude 5.57, has spectral type K3 V and has an equilibrium temperature near 1,015 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 5.57, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 219134 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 219134 b is an epic exoplanet

HD 219134 b scores 61 points on Spacedle's rarity scale, which places it in the epic tier. Another 17 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Nearby (<25 ly), Super-Earth, Tidally locked, Richly packed system and Its star is visible to the naked eye — 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.