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Trash exoplanet 14 EP

HD 207897 b

RA 325.2016° · Dec 84.3338° · exoplanet

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Score breakdown

· 3 badges
14 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by TESS +4
Total score 14

1 more point to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Found by TESS · +4

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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 8.4 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • 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. ≈ 1.6 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
6.29
diameter km
29888.0486
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2021
dist ly
92.2819
eccentricity
0
eq temp k
581.75
host star teff
5106
inclination
88.757
insolation
26.5
mag
8.37
mass earth
14.8
name
HD 207897 b
orbital period days
16.2017
radius earth
2.343
semi major au
0.117
spect
K0 V
sys num planets
1
sys num stars
1

About HD 207897 b

HD 207897 b is a trash exoplanet. It lies about 92.3 light-years from Earth, shines at apparent magnitude 8.37, has spectral type K0 V and has an equilibrium temperature near 582 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 8.37, it is an easy target for binoculars.

Like any astronomical target, HD 207897 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 207897 b is a trash exoplanet

HD 207897 b scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Sub-Neptune and Found by TESS — 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.