← Back to dex
Uncommon exoplanet 29 EP

HD 39194 b

RA 86.1291° · Dec -70.1382° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 4 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Super-Earth +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 29

5 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Tidally locked · +10
  • Multi-planet system · +6

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 8.1 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around December — that's when to go looking.

Could we get there?

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

Properties

density gcc
3.22
diameter km
25384.838
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2021
dist ly
86.1479
eccentricity
0.101
eq temp k
915.16
host star teff
5205
insolation
112.2269
mag
8.09
mass earth
4.62
name
HD 39194 b
orbital period days
5.6369
radius earth
1.99
semi major au
0.059
spect
K0 V
sys num planets
3
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HD 39194 b

HD 39194 b is an uncommon exoplanet. It lies about 86.1 light-years from Earth, shines at apparent magnitude 8.09, has spectral type K0 V and has an equilibrium temperature near 915 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 8.09, it is an easy target for binoculars.

Like any astronomical target, HD 39194 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 39194 b is an uncommon exoplanet

HD 39194 b scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Super-Earth, Tidally locked and Multi-planet system — 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.