Key parameters at a glance

A radius of 14.20 Earth radii
A mass of 177.35 Earth masses
Surface gravity around 0.88 g
An orbital period of 547.000 days
Semi-major axis 1.4440 AU
Distance from Earth 388.30 light-years
Earth Similarity Index 0.261
Travel time at Voyager 1 speed 6,847,586 years

brightness_6

Circumbinary planet

BEBOP-3 b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

BEBOP-3 b Planet Profile

Physical Specs

Radius

14.20 R⊕

Radius (Jupiter)

1.260 R♃

Mass

177.35 M⊕

Mass (Jupiter)

0.558 M♃

Density

0.34 g/cm³

Surface Gravity

0.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.261

HZ Position Unknown

Controversial No

Discovery

Year 2025

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#334of 1771

top 18.8%

This planet

14.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

OGLE-2011-BLG-0251L b 14.20 R⊕ HIP 57274 c 14.20 R⊕ HD 187123 b 14.20 R⊕

Metric	Earth	BEBOP-3 b	Jupiter
Radius (R⊕)	1.00	14.20	11.21
Mass (M⊕)	1.00	177.35	317.83
Density (g/cm³)	5.51	0.34	1.33
Surface Gravity (g)	1.00	0.88	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	177.348 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 289949453

Gaia DR2

Gaia DR2 1141769093744241536

Gaia DR3

Gaia DR3 1141769093744241536

System

BEBOP-3

Percentile among Gas Giant cohort

Radius 14.200 R⊕ · percentile 79 / cohort 1771

Mass 177.348 M⊕ · percentile 16 / cohort 1747

Orbital period 547.00 d · percentile 69 / cohort 1533

Distance 119.05 pc · percentile 38 / cohort 1759

ESI 0.261 · percentile 48 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

547.000 days

Semi-major axis

1.4440 AU

Eccentricity

0.247

Inclination

— °

Year Length

A year here lasts about 1.50 Earth years on a mildly elliptical path at a mean orbital distance of 1.4440 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.261

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Baycroft et al. 2025

Instrument

SOPHIE Spectrograph

Publication

2025-08

Observation locale

Ground

Host System: BEBOP-3

Spectral Class

F-type yellow-white

Effective Temperature

6,033 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.414 R☉

Stellar Mass

1.083 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.203 dex

Stellar density

0.560 g/cm³

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance

119.05 parsec

Light-years 388.30 ly

V-band magnitude

9.26 mag

Voyager-speed travel 6,847,586 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.371 mas

Total Proper Motion

32.333 mas/yr

PM Right Ascension

-10.72 mas/yr

PM Declination

-30.51 mas/yr

Galactic Cartesian (pc)

x = -0.067 · y = 0.176 · z = 0.982

Equatorial (J2000)

RA 110.90266° · Dec 79.13240°

Galactic ℓ, b

135.152° · 28.118°

Ecliptic λ, β

96.941° · 56.198°

HTM-20 index

-406017432