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Rare exoplanet 38 EP

HD 156846 b

RA 260.1423° · Dec -19.3344° · 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

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

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 6.5 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 June — 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. ≈ 2.7 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
9.77
diameter km
158176.88
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2007
dist ly
155.6847
eccentricity
0.85
eq temp k
382.49
host star teff
6090
insolation
3.97
mag
6.5
mass earth
3391.2461
multi star system
yes
name
HD 156846 b
orbital period days
359.51
radius earth
12.4
semi major au
1.12
spect
G0 V
sys num planets
1
sys num stars
2

About HD 156846 b

HD 156846 b is a rare exoplanet. It lies about 155.7 light-years from Earth, shines at apparent magnitude 6.5, has spectral type G0 V and has an equilibrium temperature near 382 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 6.5, it is an easy target for binoculars.

Like any astronomical target, HD 156846 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 156846 b is a rare exoplanet

HD 156846 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.