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Common exoplanet 17 EP

HD 70642 b

RA 125.3661° · Dec -39.7044° · exoplanet

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Score breakdown

· 3 badges
17 pts · Common
Common 22 pts → Uncommon
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 17

5 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Orbits a Sun-like star · +8

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. 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 7.2 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 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. ≈ 1.7 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 149.1 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
3.1
diameter km
165830.6
discovery facility
Anglo-Australian Telescope
discovery method
Radial Velocity
discovery year
2003
dist ly
95.4854
eccentricity
0.175
eq temp k
150.52
host star teff
5732
inclination
29.9
insolation
0.0934
mag
7.17
mass earth
1239.5308
name
HD 70642 b
orbital period days
2124.54
radius earth
13
semi major au
3.318
spect
G6 V
sys num planets
1
sys num stars
1

About HD 70642 b

HD 70642 b is a common exoplanet. It lies about 95.5 light-years from Earth, shines at apparent magnitude 7.17, has spectral type G6 V and has an equilibrium temperature near 151 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 7.17, it is an easy target for binoculars.

Like any astronomical target, HD 70642 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 70642 b is a common exoplanet

HD 70642 b scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Orbits a Sun-like star — 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.