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Rare exoplanet 38 EP

HD 80606 b

RA 140.6570° · Dec 50.6038° · exoplanet

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Score breakdown

· 5 badges
38 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Eccentric orbit +9
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 38

12 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Eccentric orbit · +9
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

Trivia

What it actually is

  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 9.1 you'll want a small backyard telescope.
  • 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. ≈ 3.8 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 338.5 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
5.08
diameter km
147559.4876
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2001
dist ly
216.7995
eccentricity
0.9318
eq temp k
405
host star teff
5565
inclination
89.24
insolation
4.6941
mag
9.06
mass earth
1323.4693
multi star system
yes
name
HD 80606 b
orbital period days
111.4368
radius earth
11.5677
semi major au
0.4603
spect
G5
sys num planets
1
sys num stars
2

About HD 80606 b

HD 80606 b is a rare exoplanet. It lies about 216.8 light-years from Earth, shines at apparent magnitude 9.06, has spectral type G5 and has an equilibrium temperature near 405 K.

Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

How to see it

At apparent magnitude 9.06, a small backyard telescope will bring it into view.

Like any astronomical target, HD 80606 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 80606 b is a rare exoplanet

HD 80606 b scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Eccentric orbit, Orbits a Sun-like star 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.