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Uncommon exoplanet 33 EP

HD 59686 A b

RA 112.9519° · Dec 17.0857° · exoplanet

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Score breakdown

· 4 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Its star is visible to the naked eye +12
  • Two suns in its sky +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 33

1 more point to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Its star is visible to the naked eye · +12
  • Two suns in its sky · +12

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 5.4 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 January — 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. ≈ 5.1 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 454.6 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
5.9
diameter km
162003.74
discovery facility
Lick Observatory
discovery method
Radial Velocity
discovery year
2016
dist ly
291.1663
eccentricity
0.05
eq temp k
783.08
host star teff
4658
insolation
56.2338
mag
5.443
mass earth
2199.3836
multi star system
yes
name
HD 59686 A b
orbital period days
299.36
radius earth
12.7
semi major au
1.086
spect
K2 III
sys num planets
1
sys num stars
2

About HD 59686 A b

HD 59686 A b is an uncommon exoplanet. It lies about 291.2 light-years from Earth, shines at apparent magnitude 5.44, has spectral type K2 III and has an equilibrium temperature near 783 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 5.44, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 59686 A 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 59686 A b is an uncommon exoplanet

HD 59686 A b scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Its star is visible to the naked eye and Two suns in its sky — 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.