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Common exoplanet 19 EP

HS Psc b

RA 24.3474° · Dec 26.9528° · exoplanet

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Score breakdown

· 3 badges
19 pts · Common
Common 22 pts → Uncommon
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 19

3 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Tidally locked · +10

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. 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. 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 10.8 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 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. ≈ 2.2 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.01
diameter km
173484.32
discovery facility
McDonald Observatory
discovery method
Radial Velocity
discovery year
2024
dist ly
122.8317
eccentricity
0.27
eq temp k
783.44
host star teff
4203
insolation
64.4735
mag
10.769
mass earth
464.0295
name
HS Psc b
orbital period days
3.986
radius earth
13.6
semi major au
0.0435
spect
K7 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HS Psc b

HS Psc b is a common exoplanet. It lies about 122.8 light-years from Earth, shines at apparent magnitude 10.77, has spectral type K7 V and has an equilibrium temperature near 783 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 10.77, a small backyard telescope will bring it into view.

Like any astronomical target, HS Psc 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 HS Psc b is a common exoplanet

HS Psc b scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Tidally locked — 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.