← Back to dex
Trash exoplanet 9 EP

HD 126105 b

RA 216.0017° · Dec -19.8011° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

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. 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 7.3 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 April — 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. ≈ 422.1 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
1.19
diameter km
172208.7
discovery facility
Multiple Facilities
discovery method
Radial Velocity
discovery year
2026
dist ly
270.3217
eccentricity
0.103
eq temp k
413.6
host star teff
4875
insolation
4.8659
mag
7.32
mass earth
530.7734
name
HD 126105 b
orbital period days
524
radius earth
13.5
semi major au
1.36
spect
K1 III
sys num planets
1
sys num stars
1

About HD 126105 b

HD 126105 b is a trash exoplanet. It lies about 270.3 light-years from Earth, shines at apparent magnitude 7.32, has spectral type K1 III and has an equilibrium temperature near 414 K.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

At apparent magnitude 7.32, it is an easy target for binoculars.

Like any astronomical target, HD 126105 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 126105 b is a trash exoplanet

HD 126105 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.