Key parameters at a glance

A radius of 13.60 Earth radii
A mass of 422.71 Earth masses
Surface gravity around 2.29 g
An orbital period of 4.072 days
Semi-major axis 0.0530 AU
Distance from Earth 239.01 light-years
Earth Similarity Index 0.333
Travel time at Voyager 1 speed 4,214,896 years

HD 149143 b Planet Profile

Physical Specs

Radius

13.60 R⊕

Radius (Jupiter)

1.220 R♃

Mass

422.71 M⊕

Mass (Jupiter)

1.330 M♃

Density

0.92 g/cm³

Surface Gravity

2.29 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.333

HZ Position Unknown

Controversial No

Discovery

Year 2005

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#609of 1771

top 34.3%

This planet

13.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 19994 b 13.60 R⊕ HD 205739 b 13.60 R⊕ HD 79498 b 13.60 R⊕

Metric	Earth	HD 149143 b	Jupiter
Radius (R⊕)	1.00	13.60	11.21
Mass (M⊕)	1.00	422.71	317.83
Density (g/cm³)	5.51	0.92	1.33
Surface Gravity (g)	1.00	2.29	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	422.714 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 149143

HIP

HIP 81022

TIC

TIC 281520119

Gaia DR2

Gaia DR2 4432401099808805888

Gaia DR3

Gaia DR3 4432401099808805888

System

HD 149143

Percentile among Gas Giant cohort

Radius 13.600 R⊕ · percentile 63 / cohort 1771

Mass 422.714 M⊕ · percentile 44 / cohort 1747

Orbital period 4.07 d · percentile 29 / cohort 1533

Distance 73.28 pc · percentile 29 / cohort 1759

ESI 0.333 · percentile 66 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.072 days

Semi-major axis

0.0530 AU

Eccentricity

0.017

Inclination

— °

Year Length

A year here lasts approximately 4.07 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0530 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.333

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Da Silva et al. 2006

Instrument

ELODIE Spectrograph

Publication

2006-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2005 at Haute-Provence Observatory (3 shown).

HD 33564 b · Gas Giant HD 189733 b · Gas Giant HD 118203 b · Gas Giant

Host System: HD 149143

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,856 K — hotter than the Sun (5,778 K)

Estimated Age

4.28 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.440 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

4.250 dex

Stellar density

0.286 g/cm³

Systemic radial velocity

12.06 km/s

Rotational v·sin i

3.90 km/s

Metallicity ratio

[Fe/H]

Distance

73.28 parsec

Light-years 239.01 ly

V-band magnitude

7.89 mag

Voyager-speed travel 4,214,896 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

13.618 mas

Total Proper Motion

87.239 mas/yr

PM Right Ascension

-9.33 mas/yr

PM Declination

-86.74 mas/yr

Galactic Cartesian (pc)

x = -0.371 · y = -0.928 · z = 0.036

Equatorial (J2000)

RA 248.21267° · Dec 2.08445°

Galactic ℓ, b

17.516° · 31.481°

Ecliptic λ, β

246.093° · 23.734°

HTM-20 index

1058654934

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes