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Common exoplanet 21 EP

HIP 19976 b

RA 64.2598° · Dec -40.7985° · exoplanet

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Score breakdown

· 3 badges
21 pts · Common
Common 22 pts → Uncommon
  • Two suns in its sky +12
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 21

1 more point to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Neptune-like · +4
  • 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. 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 10.5 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 November — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.985
diameter km
63015.628
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
131.3453
eccentricity
0.304
eq temp k
378.1
host star teff
4316
insolation
3.4055
mag
10.48
mass earth
21.6123
multi star system
yes
name
HIP 19976 b
orbital period days
50.6591
radius earth
4.94
semi major au
0.234
sys num planets
1
sys num stars
2

About HIP 19976 b

HIP 19976 b is a common exoplanet. It lies about 131.3 light-years from Earth, shines at apparent magnitude 10.48, has an equilibrium temperature near 378 K and spans roughly 4.94 Earth radii.

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 10.48, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 19976 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 19976 b is a common exoplanet

HIP 19976 b scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Neptune-like 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.