Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,880.91 Earth masses
Surface gravity around 11.48 g
An orbital period of 5,859.090 days
Semi-major axis 6.4260 AU
Distance from Earth 200.56 light-years
Earth Similarity Index 0.438
Travel time at Voyager 1 speed 3,536,901 years

HD 56957 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,880.91 M⊕

Mass (Jupiter)

5.918 M♃

Density

4.93 g/cm³

Surface Gravity

11.48 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.438

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1063of 1771

top 60.0%

This planet

12.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 240210 b 12.80 R⊕ HD 29985 b 12.80 R⊕ HD 148164 c 12.80 R⊕

Metric	Earth	HD 56957 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,880.91	317.83
Density (g/cm³)	5.51	4.93	1.33
Surface Gravity (g)	1.00	11.48	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,880.909 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 56957

TIC

TIC 22972926

Gaia DR2

Gaia DR2 5561488078545298176

Gaia DR3

Gaia DR3 5561488078545298176

System

HD 56957

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,880.909 M⊕ · percentile 79 / cohort 1747

Orbital period 5,859.09 d · percentile 94 / cohort 1533

Distance 61.49 pc · percentile 25 / cohort 1759

ESI 0.438 · percentile 97 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

5,859.090 days

Semi-major axis

6.4260 AU

Eccentricity

0.273

Inclination

170.01 °

Year Length

A year here lasts about 16.04 Earth years on a mildly elliptical path at a mean orbital distance of 6.4260 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.438

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Feng et al. 2022

Instrument

Multiple Instruments

Publication

2022-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial HD 93351 b · Super-Earth GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 213519 b · Sub-Neptune HD 191939 g · Sub-Neptune GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune

Host System: HD 56957

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,743 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.778 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

—

Distance

61.49 parsec

Light-years 200.56 ly

V-band magnitude

7.57 mag

Voyager-speed travel 3,536,901 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

16.233 mas

Total Proper Motion

124.832 mas/yr

PM Right Ascension

50.15 mas/yr

PM Declination

114.32 mas/yr

Galactic Cartesian (pc)

x = -0.251 · y = 0.716 · z = -0.652

Equatorial (J2000)

RA 109.32540° · Dec -40.65607°

Galactic ℓ, b

252.314° · -12.771°

Ecliptic λ, β

122.262° · -61.948°

HTM-20 index

1456587361