Key parameters at a glance

A radius of 12.40 Earth radii
A mass of 3,464.33 Earth masses
Surface gravity around 22.53 g
An orbital period of 1,790,000.000 days
Semi-major axis 556.0000 AU
Distance from Earth 319.94 light-years
Earth Similarity Index 0.371
Travel time at Voyager 1 speed 5,642,103 years

brightness_6

Circumbinary planet

b Cen AB b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

b Cen AB b Planet Profile

Physical Specs

Radius

12.40 R⊕

Radius (Jupiter)

1.110 R♃

Mass

3,464.33 M⊕

Mass (Jupiter)

10.900 M♃

Density

9.98 g/cm³

Surface Gravity

22.53 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.371

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Imaging

Facility Paranal Observatory

Telescope 8.2 m ESO VLT UT3 Melipal Telescope

Size rank in cohort

Rank by radius

#1298of 1771

top 73.2%

This planet

12.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 110014 b 12.40 R⊕ CFBDSIR J145829+101343 b 12.40 R⊕ MOA-2010-BLG-073L b 12.40 R⊕

Metric	Earth	b Cen AB b	Jupiter
Radius (R⊕)	1.00	12.40	11.21
Mass (M⊕)	1.00	3,464.33	317.83
Density (g/cm³)	5.51	9.98	1.33
Surface Gravity (g)	1.00	22.53	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,464.330 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 159589603

Gaia DR2

Gaia DR2 6105713692543053056

Gaia DR3

Gaia DR3 6105713692544123520

System

b Cen

Percentile among Gas Giant cohort

Radius 12.400 R⊕ · percentile 25 / cohort 1771

Mass 3,464.330 M⊕ · percentile 89 / cohort 1747

Orbital period 1,790,000.00 d · percentile 100 / cohort 1533

Distance 98.09 pc · percentile 34 / cohort 1759

ESI 0.371 · percentile 77 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,790,000.000 days

Semi-major axis

556.0000 AU

Eccentricity

0.400

Inclination

143.00 °

Year Length

A year here lasts about 4900.75 Earth years on a highly eccentric trajectory at a mean orbital distance of 556.0000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.371

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Janson et al. 2021

Instrument

SPHERE

Publication

2021-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Paranal Observatory (3 shown).

HD 5278 c · Neptune-like HD 22496 b · Sub-Neptune WASP-110 b · Gas Giant

Host System: b Cen A

Spectral Class

B-type blue-white

Effective Temperature

—

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

—

Stellar Mass

5.500 M☉

Metallicity [Fe/H]

—

Distance

98.09 parsec

Light-years 319.94 ly

V-band magnitude

4.01 mag

Voyager-speed travel 5,642,103 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

10.244 mas

Total Proper Motion

44.562 mas/yr

PM Right Ascension

-31.52 mas/yr

PM Declination

-31.50 mas/yr

Galactic Cartesian (pc)

x = -0.601 · y = -0.513 · z = -0.613

Equatorial (J2000)

RA 220.48980° · Dec -37.79363°

Galactic ℓ, b

325.902° · 20.099°

Ecliptic λ, β

229.929° · -20.987°

HTM-20 index

-900910864

Similar Worlds

kap And b

Gas Giant · B-type blue-white

Radius 12.30 R⊕ · 163.1 ly

mu2 Sco b

Gas Giant · B-type blue-white

Radius 12.30 R⊕ · —

HIP 77900 b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 492.0 ly

HIP 79098 AB b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 475.5 ly

DP Leo b

Gas Giant · B-type blue-white

Radius 12.70 R⊕ · 997.0 ly

HIP 78530 b

Gas Giant · B-type blue-white

Radius 12.00 R⊕ · 446.0 ly

Explore Related Categories

Gas Giant Planets Imaging Discoveries Paranal Observatory Mission B-type blue-white Hosts