Key parameters at a glance

A radius of 11.90 Earth radii
A mass of 8,445.34 Earth masses
Surface gravity around 59.64 g
An orbital period of 20,324.582 days
Semi-major axis 15.3690 AU
Distance from Earth 179.51 light-years
Earth Similarity Index 0.257
Travel time at Voyager 1 speed 3,165,625 years

HD 457 b Planet Profile

Physical Specs

Radius

11.90 R⊕

Radius (Jupiter)

1.070 R♃

Mass

8,445.34 M⊕

Mass (Jupiter)

26.572 M♃

Density

27.50 g/cm³

Surface Gravity

59.64 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.257

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1526of 1771

top 86.1%

This planet

11.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J22501512+2325342 b 11.90 R⊕ KMT-2020-BLG-0414L c 11.90 R⊕ DENIS-P J082303.1-491201 b 11.90 R⊕

Metric	Earth	HD 457 b	Jupiter
Radius (R⊕)	1.00	11.90	11.21
Mass (M⊕)	1.00	8,445.34	317.83
Density (g/cm³)	5.51	27.50	1.33
Surface Gravity (g)	1.00	59.64	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	8,445.336 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 457

TIC

TIC 120506209

Gaia DR2

Gaia DR2 4996584567835662848

Gaia DR3

Gaia DR3 4996584567835662848

System

HD 457

Percentile among Gas Giant cohort

Radius 11.900 R⊕ · percentile 13 / cohort 1771

Mass 8,445.336 M⊕ · percentile 99 / cohort 1747

Orbital period 20,324.58 d · percentile 98 / cohort 1533

Distance 55.04 pc · percentile 22 / cohort 1759

ESI 0.257 · percentile 47 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

20,324.582 days

Semi-major axis

15.3690 AU

Eccentricity

0.565

Inclination

62.59 °

Year Length

A year here lasts about 55.65 Earth years on a highly eccentric trajectory at a mean orbital distance of 15.3690 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.257

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 457

Spectral Class

F-type yellow-white

Effective Temperature

6,114 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.282 R☉

Stellar Mass

1.150 M☉

Metallicity [Fe/H]

0.34

Extended Stellar Properties

Surface gravity (log g)

4.283 dex

Stellar density

0.770 g/cm³

Metallicity ratio

[M/H]

Distance

55.04 parsec

Light-years 179.51 ly

V-band magnitude

7.72 mag

Voyager-speed travel 3,165,625 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.141 mas

Total Proper Motion

114.488 mas/yr

PM Right Ascension

112.96 mas/yr

PM Declination

-18.65 mas/yr

Galactic Cartesian (pc)

x = 0.768 · y = 0.030 · z = -0.639

Equatorial (J2000)

RA 2.24929° · Dec -39.73724°

Galactic ℓ, b

335.195° · -74.619°

Ecliptic λ, β

343.566° · -36.764°

HTM-20 index

-1533956738