← Back to dex
Uncommon exoplanet 29 EP

WASP-89 b

RA 313.9000° · Dec -18.9714° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 4 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Hot Jupiter +10
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 29

5 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • Tidally locked · +10

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. 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 13.2 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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 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. ≈ 16.7 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
7
diameter km
148703.6156
discovery facility
SuperWASP
discovery method
Transit
discovery year
2015
dist ly
948.9378
eccentricity
0.193
eq temp k
1120
host star teff
5130
inclination
89.4
insolation
278.8533
mag
13.21
mass earth
1875.197
name
WASP-89 b
orbital period days
3.3564
radius earth
11.6574
semi major au
0.0427
spect
K3
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About WASP-89 b

WASP-89 b is an uncommon exoplanet. It lies about 948.9 light-years from Earth, shines at apparent magnitude 13.21, has spectral type K3 and has an equilibrium temperature near 1,120 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 13.21, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, WASP-89 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 WASP-89 b is an uncommon exoplanet

WASP-89 b scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter and Tidally locked — 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.