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Common exoplanet 17 EP

HD 12484 b

RA 30.6115° · Dec 2.8158° · exoplanet

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Score breakdown

· 3 badges
17 pts · Common
Common 22 pts → Uncommon
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 17

5 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • 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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

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.
  • 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 October — 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. ≈ 2.8 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
2.26
diameter km
168381.84
discovery facility
Haute-Provence Observatory
discovery method
Radial Velocity
discovery year
2016
dist ly
157.653
eccentricity
0.07
eq temp k
524.3
host star teff
5920
insolation
11.9305
mag
8.18
mass earth
947.1334
name
HD 12484 b
orbital period days
58.83
radius earth
13.2
semi major au
0.297
spect
F8
sys num planets
1
sys num stars
1

About HD 12484 b

HD 12484 b is a common exoplanet. It lies about 157.7 light-years from Earth, shines at apparent magnitude 8.18, has spectral type F8 and has an equilibrium temperature near 524 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 8.18, it is an easy target for binoculars.

Like any astronomical target, HD 12484 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 12484 b is a common exoplanet

HD 12484 b scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, 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.