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Uncommon exoplanet 24 EP

HD 93385 d

RA 161.5627° · Dec -41.4646° · 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

  • 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 3 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 7.5 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 March — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.98
diameter km
36865.418
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2021
dist ly
141.3805
eccentricity
0.09
eq temp k
619.44
host star teff
5977
insolation
24.471
mag
7.49
mass earth
8.7
name
HD 93385 d
orbital period days
45.85
radius earth
2.89
semi major au
0.2565
spect
G2/G3 V
sys num planets
3
sys num stars
1

About HD 93385 d

HD 93385 d is an uncommon exoplanet. It lies about 141.4 light-years from Earth, shines at apparent magnitude 7.49, has spectral type G2/G3 V and has an equilibrium temperature near 619 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 7.49, it is an easy target for binoculars.

Like any astronomical target, HD 93385 d 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 93385 d is an uncommon exoplanet

HD 93385 d 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.