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Rare exoplanet 39 EP

rho CrB e

RA 240.2601° · Dec 33.3002° · exoplanet

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Score breakdown

· 5 badges
39 pts · Rare
Rare 50 pts → Epic
  • Its star is visible to the naked eye +12
  • Super-Earth +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 39

11 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Multi-planet system · +6
  • Its star is visible to the naked eye · +12
  • Orbits a Sun-like star · +8

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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • Crowded system. One of at least 3 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 5.4 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 May — that's when to go looking.

Could we get there?

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

Properties

density gcc
3.8
diameter km
22323.35
discovery facility
Lowell Observatory
discovery method
Radial Velocity
discovery year
2023
dist ly
56.97
eccentricity
0.082
eq temp k
1004.88
host star teff
5817
insolation
151.5473
mag
5.4082
mass earth
3.71
name
rho CrB e
orbital period days
12.904
radius earth
1.75
semi major au
0.1061
spect
G0
sys num planets
3
sys num stars
1

About rho CrB e

rho CrB e is a rare exoplanet. It lies about 57 light-years from Earth, shines at apparent magnitude 5.41, has spectral type G0 and has an equilibrium temperature near 1,005 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 5.41, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, rho CrB e 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 rho CrB e is a rare exoplanet

rho CrB e scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Super-Earth, Multi-planet system, Its star is visible to the naked eye 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.