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Uncommon exoplanet 27 EP

nu Oph c

RA 269.7566° · Dec -9.7741° · exoplanet

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Score breakdown

· 4 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Its star is visible to the naked eye +12
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 27

7 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Multi-planet system · +6
  • Its star is visible to the naked eye · +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.
  • Crowded system. One of at least 2 planets orbiting its star.

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 3.3 you can see it with your own eyes from a dark site.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • 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.

Properties

density gcc
24.9
diameter km
153074.4
discovery facility
Okayama Astrophysical Observatory
discovery method
Radial Velocity
discovery year
2012
dist ly
150.719
eccentricity
0.179
eq temp k
341.48
host star teff
4887
inclination
90
insolation
2.3098
mag
3.3122
mass earth
7838.3235
name
nu Oph c
orbital period days
3180.6
radius earth
12
semi major au
5.829
spect
K0 III
sys num planets
2
sys num stars
1

About nu Oph c

nu Oph c is an uncommon exoplanet. It lies about 150.7 light-years from Earth, shines at apparent magnitude 3.31, has spectral type K0 III and has an equilibrium temperature near 341 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 3.31, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, nu Oph c 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 nu Oph c is an uncommon exoplanet

nu Oph c scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Multi-planet system and Its star is visible to the naked eye — 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.