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Trash exoplanet 9 EP

HD 145457 b

RA 242.5162° · Dec 26.7429° · 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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

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 6.6 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 May — 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. ≈ 7.8 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 689 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
2.12
diameter km
168381.84
discovery facility
Subaru Telescope
discovery method
Radial Velocity
discovery year
2010
dist ly
441.263
eccentricity
0.111
eq temp k
826.81
host star teff
4757
insolation
77.8446
mag
6.5723
mass earth
888.0126
name
HD 145457 b
orbital period days
176.13
radius earth
13.2
semi major au
0.762
spect
K0
sys num planets
1
sys num stars
1

About HD 145457 b

HD 145457 b is a trash exoplanet. It lies about 441.3 light-years from Earth, shines at apparent magnitude 6.57, has spectral type K0 and has an equilibrium temperature near 827 K.

Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

How to see it

At apparent magnitude 6.57, it is an easy target for binoculars.

Like any astronomical target, HD 145457 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 145457 b is a trash exoplanet

HD 145457 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.