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Uncommon exoplanet 24 EP

HD 51608 c

RA 103.7137° · Dec -55.2600° · exoplanet

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Score breakdown

· 4 badges
24 pts · Uncommon
Uncommon 34 pts → Rare
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 24

10 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

Trivia

What it actually is

  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
  • Crowded system. One of at least 2 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 8.2 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around January — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 2 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.36
diameter km
49366.494
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
114.335
eccentricity
0.14
eq temp k
400.69
host star teff
5358
insolation
3.9287
mag
8.17
mass earth
14.31
name
HD 51608 c
orbital period days
95.9446
radius earth
3.87
semi major au
0.3809
spect
G7 V
sys num planets
2
sys num stars
1

About HD 51608 c

HD 51608 c is an uncommon exoplanet. It lies about 114.3 light-years from Earth, shines at apparent magnitude 8.17, has spectral type G7 V and has an equilibrium temperature near 401 K.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

At apparent magnitude 8.17, it is an easy target for binoculars.

Like any astronomical target, HD 51608 c 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 51608 c is an uncommon exoplanet

HD 51608 c scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 10 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Multi-planet system 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.