Key parameters at a glance

A radius of 13.10 Earth radii
A mass of 953.49 Earth masses
Surface gravity around 5.56 g
Semi-major axis 37.2000 AU
Distance from Earth 370.51 light-years
Earth Similarity Index 0.398
Travel time at Voyager 1 speed 6,534,000 years

HD 169142 b Planet Profile

Physical Specs

Radius

13.10 R⊕

Radius (Jupiter)

1.170 R♃

Mass

953.49 M⊕

Mass (Jupiter)

3.000 M♃

Density

2.33 g/cm³

Surface Gravity

5.56 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.398

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Imaging

Facility Paranal Observatory

Telescope 8.2 m ESO VLT UT3 Melipal Telescope

Size rank in cohort

Rank by radius

#910of 1771

top 51.3%

This planet

13.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 3021 b 13.10 R⊕ HD 221287 b 13.10 R⊕ HD 37605 c 13.10 R⊕

Metric	Earth	HD 169142 b	Jupiter
Radius (R⊕)	1.00	13.10	11.21
Mass (M⊕)	1.00	953.49	317.83
Density (g/cm³)	5.51	2.33	1.33
Surface Gravity (g)	1.00	5.56	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	953.485 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 169142

TIC

TIC 51077087

Gaia DR2

Gaia DR2 4048015133392824064

Gaia DR3

Gaia DR3 4048015133392824064

System

HD 169142

Percentile among Gas Giant cohort

Radius 13.100 R⊕ · percentile 46 / cohort 1771

Mass 953.485 M⊕ · percentile 66 / cohort 1747

Distance 113.60 pc · percentile 37 / cohort 1759

ESI 0.398 · percentile 85 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

37.2000 AU

Eccentricity

—

Inclination

13.00 °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.398

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Hammond et al. 2023

Instrument

SPHERE

Publication

2023-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at Paranal Observatory (5 shown).

L 363-38 b · Sub-Neptune HIP 29442 d · Super-Earth HIP 29442 c · Super-Earth AF Lep b · Gas Giant HIP 81208 C b · Gas Giant

Host System: HD 169142

Spectral Class

F-type yellow-white

Effective Temperature

7,246 K — hotter than the Sun (5,778 K)

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.537 R☉

Stellar Mass

1.850 M☉

Metallicity [Fe/H]

—

Distance

113.60 parsec

Light-years 370.51 ly

V-band magnitude

8.16 mag

Voyager-speed travel 6,534,000 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.775 mas

Total Proper Motion

37.867 mas/yr

PM Right Ascension

-2.32 mas/yr

PM Declination

-37.80 mas/yr

Galactic Cartesian (pc)

x = 0.093 · y = -0.863 · z = -0.497

Equatorial (J2000)

RA 276.12407° · Dec -29.78053°

Galactic ℓ, b

3.392° · -7.810°

Ecliptic λ, β

275.343° · -6.455°

HTM-20 index

-1906093004