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Rare exoplanet 39 EP

SR 12 AB c

RA 246.8312° · Dec -24.6947° · exoplanet

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Score breakdown

· 4 badges
39 pts · Rare
Rare 50 pts → Epic
  • Directly imaged +16
  • Circumbinary (orbits both stars) +14
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 39

11 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Circumbinary (orbits both stars) · +14
  • Directly imaged · +16

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 13.4 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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 May — 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. ≈ 6.4 million years at Voyager 1's speed (17 km/s).

Properties

circumbinary
yes
density gcc
12.2
diameter km
156901.26
discovery facility
Infrared Survey Facility
discovery method
Imaging
discovery year
2010
dist ly
366.3293
host star teff
3828.93
mag
13.355
mass earth
4131.62
name
SR 12 AB c
radius earth
12.3
sys num planets
1
sys num stars
2

About SR 12 AB c

SR 12 AB c is a rare exoplanet. It lies about 366.3 light-years from Earth, shines at apparent magnitude 13.36, spans roughly 12.3 Earth radii and weighs about 4,131.62 Earth masses.

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 13.36, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, SR 12 AB 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 SR 12 AB c is a rare exoplanet

SR 12 AB c 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 4 science badges — Confirmed exoplanet, Gas giant, Circumbinary (orbits both stars) and Directly imaged — 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.