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Trash exoplanet 10 EP

HIP 35173 b

RA 109.0449° · Dec -3.6661° · exoplanet

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Score breakdown

· 2 badges
10 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 10

5 more points to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5

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 9 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around January — 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. ≈ 1.9 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.48
diameter km
46049.882
discovery facility
Las Campanas Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
108.1409
eccentricity
0.16
eq temp k
444.34
host star teff
4881
insolation
6.4967
mag
9.01
mass earth
12.7
name
HIP 35173 b
orbital period days
41.516
radius earth
3.61
semi major au
0.217
spect
K2 V
sys num planets
1
sys num stars
1

About HIP 35173 b

HIP 35173 b is a trash exoplanet. It lies about 108.1 light-years from Earth, shines at apparent magnitude 9.01, has spectral type K2 V and has an equilibrium temperature near 444 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 9.01, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 35173 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 35173 b is a trash exoplanet

HIP 35173 b scores 10 points on Spacedle's rarity scale, which places it in the trash tier. Another 5 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet and Sub-Neptune — 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.