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Uncommon exoplanet 26 EP

HIP 54373 b

RA 166.8644° · Dec -19.2917° · exoplanet

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Score breakdown

· 4 badges
26 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 26

8 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • 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. 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.
  • Crowded system. One of at least 2 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 10.4 you'll want a small backyard telescope.
  • 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 March — that's when to go looking.

Could we get there?

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

Properties

density gcc
2
diameter km
36610.294
discovery facility
Las Campanas Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
61.046
eccentricity
0.2
eq temp k
580.66
host star teff
4021
insolation
15.0984
mag
10.38
mass earth
8.62
name
HIP 54373 b
orbital period days
7.76
radius earth
2.87
semi major au
0.063
spect
K5 V
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HIP 54373 b

HIP 54373 b is an uncommon exoplanet. It lies about 61 light-years from Earth, shines at apparent magnitude 10.38, has spectral type K5 V and has an equilibrium temperature near 581 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 10.38, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 54373 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 HIP 54373 b is an uncommon exoplanet

HIP 54373 b scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

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