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Epic exoplanet 60 EP

HD 89744 b

RA 155.5433° · Dec 41.2289° · exoplanet

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Score breakdown

· 6 badges
60 pts · Epic
Epic 78 pts → Anomaly
  • Found before the year 2000 +18
  • Its star is visible to the naked eye +12
  • Two suns in its sky +12
  • Eccentric orbit +9
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 60

18 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Eccentric orbit · +9
  • Its star is visible to the naked eye · +12
  • Two suns in its sky · +12
  • Found before the year 2000 · +18

Trivia

What it actually is

  • 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 5.7 you can see it with your own eyes from a dark site.
  • 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 February — 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. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 196.8 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
7.29
diameter km
160728.12
discovery facility
Fred Lawrence Whipple Observatory
discovery method
Radial Velocity
discovery year
1999
dist ly
126.0149
eccentricity
0.677
eq temp k
462.62
host star teff
6291
insolation
7.4311
mag
5.7347
mass earth
2653.8805
multi star system
yes
name
HD 89744 b
orbital period days
256.78
radius earth
12.6
semi major au
0.917
spect
F7 V
sys num planets
1
sys num stars
2

About HD 89744 b

HD 89744 b is an epic exoplanet. It lies about 126 light-years from Earth, shines at apparent magnitude 5.73, has spectral type F7 V and has an equilibrium temperature near 463 K.

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

How to see it

At apparent magnitude 5.73, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 89744 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 89744 b is an epic exoplanet

HD 89744 b scores 60 points on Spacedle's rarity scale, which places it in the epic tier. Another 18 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Eccentric orbit, Its star is visible to the naked eye, Two suns in its sky and Found before the year 2000 — 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.