Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 4,131.62 Earth masses
Surface gravity around 27.31 g
Distance from Earth 366.33 light-years
Earth Similarity Index 0.347
Travel time at Voyager 1 speed 6,460,218 years

brightness_6

Circumbinary planet

SR 12 AB c orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

SR 12 AB c Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.100 R♃

Mass

4,131.62 M⊕

Mass (Jupiter)

13.000 M♃

Density

12.20 g/cm³

Surface Gravity

27.31 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.347

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Imaging

Facility Infrared Survey Facility

Telescope 1.4 m IRSF Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕

Metric	Earth	SR 12 AB c	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	4,131.62	317.83
Density (g/cm³)	5.51	12.20	1.33
Surface Gravity (g)	1.00	27.31	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4,131.620 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 175629526

Gaia DR2

Gaia DR2 6049072007438134272

Gaia DR3

Gaia DR3 6049072007438134272

System

SR 12

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 4,131.620 M⊕ · percentile 92 / cohort 1747

Distance 112.32 pc · percentile 37 / cohort 1759

ESI 0.347 · percentile 70 / cohort 1771

Orbit & Habitability

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.347

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Kuzuhara et al. 2011

Instrument

SIRIUS Camera

Publication

2011-04

Observation locale

Ground

Host System: SR 12 AB

Spectral Class

K-type orange

Effective Temperature

3,829 K — cooler than the Sun (5,778 K)

Estimated Age

0.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.103 R☉

Stellar Mass

—

Metallicity [Fe/H]

—

Distance

112.32 parsec

Light-years 366.33 ly

V-band magnitude

13.36 mag

Voyager-speed travel 6,460,218 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

8.903 mas

Total Proper Motion

27.811 mas/yr

PM Right Ascension

-7.88 mas/yr

PM Declination

-26.67 mas/yr

Galactic Cartesian (pc)

x = -0.357 · y = -0.835 · z = -0.418

Equatorial (J2000)

RA 246.83124° · Dec -24.69467°

Galactic ℓ, b

352.980° · 16.565°

Ecliptic λ, β

249.023° · -2.927°

HTM-20 index

-775849125

Similar Worlds

2MASS J22362452+4751425 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 226.9 ly

HD 158996 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 925.2 ly

11 UMi b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 408.7 ly

HD 22781 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 106.3 ly

HD 4760 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 1,754.3 ly

AB Pic b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 163.2 ly

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