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Epic exoplanet 71 EP

HD 93963 A b

RA 162.7767° · Dec 25.6411° · exoplanet

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Score breakdown

· 9 badges
71 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Two suns in its sky +12
  • Tidally locked +10
  • Super-Earth +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
  • Found by TESS +4
Total score 71

7 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Lava world · +14
  • Tidally locked · +10
  • Multi-planet system · +6
  • Blasted by starlight · +4
  • Found by TESS · +4
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • 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 9.2 you'll want a small backyard telescope.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around March — that's when to go looking.

Properties

density gcc
4.81
diameter km
18745.7931
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2022
dist ly
268.5673
eccentricity
0
eq temp k
1842.23
host star teff
5908
inclination
86.21
insolation
2898
mag
9.182
mass earth
2.8
multi star system
yes
name
HD 93963 A b
orbital period days
1.0376
radius earth
1.4695
semi major au
0.0206
spect
G0 V
sys num planets
2
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About HD 93963 A b

HD 93963 A b is an epic exoplanet. It lies about 268.6 light-years from Earth, shines at apparent magnitude 9.18, has spectral type G0 V and has an equilibrium temperature near 1,842 K.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 9.18, a small backyard telescope will bring it into view.

Like any astronomical target, HD 93963 A 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 93963 A b is an epic exoplanet

HD 93963 A b scores 71 points on Spacedle's rarity scale, which places it in the epic tier. Another 7 points would lift it into a rarer tier.

That score comes from 9 science badges — Confirmed exoplanet, Super-Earth, Lava world, Tidally locked, Multi-planet system, Blasted by starlight, Found by TESS 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.