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Rare exoplanet 47 EP

HD 136118 b

RA 229.7306° · Dec -1.5923° · exoplanet

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Score breakdown

· 4 badges
47 pts · Rare
Rare 50 pts → Epic
  • In the habitable zone +30
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 47

3 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.

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 6.9 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.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Properties

density gcc
12.3
diameter km
156901.26
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
167.7613
eccentricity
0.344
eq temp k
249.62
habitable zone
yes
host star teff
6097
inclination
116.779
insolation
0.684
mag
6.9456
mass earth
4164.1878
name
HD 136118 b
orbital period days
1187.5976
radius earth
12.3
semi major au
2.327
spect
F7 V
sys num planets
1
sys num stars
1

Nearby objects

About HD 136118 b

HD 136118 b is a rare exoplanet. It lies about 167.8 light-years from Earth, shines at apparent magnitude 6.95, has spectral type F7 V and has an equilibrium temperature near 250 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 6.95, it is an easy target for binoculars.

Like any astronomical target, HD 136118 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 136118 b is a rare exoplanet

HD 136118 b scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Gas giant 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.