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Trash exoplanet 9 EP

HD 211403 b

RA 333.8158° · Dec 58.2756° · exoplanet

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Score breakdown

· 2 badges
9 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 9

6 more points to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4

Trivia

What it actually is

  • 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.

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 8.5 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 August — 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. ≈ 4.8 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 423.2 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
4.61
diameter km
163279.36
discovery facility
Haute-Provence Observatory
discovery method
Radial Velocity
discovery year
2021
dist ly
271.0092
eccentricity
0.084
eq temp k
380
host star teff
6273
insolation
3.44
mag
8.48
mass earth
1760.7694
name
HD 211403 b
orbital period days
223.8
radius earth
12.8
semi major au
0.768
spect
F7 V
sys num planets
1
sys num stars
1

About HD 211403 b

HD 211403 b is a trash exoplanet. It lies about 271 light-years from Earth, shines at apparent magnitude 8.48, has spectral type F7 V and has an equilibrium temperature near 380 K.

Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

How to see it

At apparent magnitude 8.48, it is an easy target for binoculars.

Like any astronomical target, HD 211403 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 211403 b is a trash exoplanet

HD 211403 b scores 9 points on Spacedle's rarity scale, which places it in the trash tier. Another 6 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet and Gas giant — 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.