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Rare exoplanet 41 EP

HD 46375 b

RA 98.3031° · Dec 5.4625° · exoplanet

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Score breakdown

· 5 badges
41 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Hot Jupiter +10
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 41

9 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • Tidally locked · +10
  • Two suns in its sky · +12

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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

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 7.9 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 December — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.395
diameter km
127562
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
2000
dist ly
96.3886
eccentricity
0.063
eq temp k
1221.4
host star teff
5285
insolation
359.0994
mag
7.91
mass earth
71.8
multi star system
yes
name
HD 46375 b
orbital period days
3.0236
radius earth
10
semi major au
0.0398
spect
K1 IV-V
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About HD 46375 b

HD 46375 b is a rare exoplanet. It lies about 96.4 light-years from Earth, shines at apparent magnitude 7.91, has spectral type K1 IV-V and has an equilibrium temperature near 1,221 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 7.91, it is an easy target for binoculars.

Like any astronomical target, HD 46375 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 46375 b is a rare exoplanet

HD 46375 b scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Tidally locked and Two suns in its sky — 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.