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Rare exoplanet 39 EP

HD 142 b

RA 1.5837° · Dec -49.0754° · exoplanet

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Score breakdown

· 5 badges
39 pts · Rare
Rare 50 pts → Epic
  • Its star is visible to the naked eye +12
  • Two suns in its sky +12
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 39

11 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Multi-planet system · +6
  • 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.
  • Crowded system. One of at least 3 planets orbiting its star.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

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.
  • 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 September — 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. ≈ 1.5 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
6.05
diameter km
162003.74
discovery facility
Anglo-Australian Telescope
discovery method
Radial Velocity
discovery year
2001
dist ly
85.4049
eccentricity
0.158
eq temp k
358.19
host star teff
6245
inclination
59
insolation
2.7603
mag
5.7
mass earth
2256.5817
multi star system
yes
name
HD 142 b
orbital period days
351.4339
radius earth
12.7
semi major au
1.039
spect
F7V
sys num planets
3
sys num stars
2

About HD 142 b

HD 142 b is a rare exoplanet. It lies about 85.4 light-years from Earth, shines at apparent magnitude 5.7, has spectral type F7V and has an equilibrium temperature near 358 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 5.7, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 142 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 142 b is a rare exoplanet

HD 142 b scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Multi-planet system, 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.