Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 262.21 Earth masses
Surface gravity around 1.36 g
An orbital period of 1,121.790 days
Semi-major axis 2.0670 AU
Distance from Earth 123.31 light-years
Earth Similarity Index 0.293
Travel time at Voyager 1 speed 2,174,528 years

HD 114729 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

262.21 M⊕

Mass (Jupiter)

0.825 M♃

Density

0.54 g/cm³

Surface Gravity

1.36 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.293

HZ Position Unknown

Controversial No

Discovery

Year 2002

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#456of 1771

top 25.7%

This planet

13.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

24 Sex c 13.90 R⊕ HD 148156 b 13.90 R⊕ HD 134987 c 13.90 R⊕

Metric	Earth	HD 114729 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	262.21	317.83
Density (g/cm³)	5.51	0.54	1.33
Surface Gravity (g)	1.00	1.36	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	262.210 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 114729

HIP

HIP 64459

TIC

TIC 124401411

Gaia DR2

Gaia DR2 6180035765135232128

Gaia DR3

Gaia DR3 6180035765135232128

System

HD 114729

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 262.210 M⊕ · percentile 28 / cohort 1747

Orbital period 1,121.79 d · percentile 79 / cohort 1533

Distance 37.81 pc · percentile 12 / cohort 1759

ESI 0.293 · percentile 56 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,121.790 days

Semi-major axis

2.0670 AU

Eccentricity

0.079

Inclination

— °

Year Length

A year here lasts about 3.07 Earth years on a nearly circular orbit at a mean orbital distance of 2.0670 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

16.910 m/s

Transit mid-time (BJD)

2,451,631.0000

Long. of periastron (ω)

77.06°

Angular separation (arcsec)

54.70000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.293

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Butler et al. 2003

Instrument

HIRES Spectrometer

Publication

2003-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2002 at W. M. Keck Observatory (7 shown).

HD 49674 b · Neptune-like 14 Her b · Gas Giant HD 72659 b · Gas Giant HD 128311 b · Gas Giant HD 108874 b · Gas Giant HD 37124 b · Gas Giant HD 37124 c · Gas Giant

Host System: HD 114729

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,844 K — hotter than the Sun (5,778 K)

Estimated Age

10.12 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.473 R☉

Stellar Mass

0.936 M☉

Metallicity [Fe/H]

-0.33

Extended Stellar Properties

Surface gravity (log g)

4.046 dex

Stellar density

0.375 g/cm³

Systemic radial velocity

65.09 km/s

Rotational v·sin i

2.29 km/s

Rotation period

34.00 days

Activity index (log R'HK)

-5.050

Metallicity ratio

[Fe/H]

Distance

37.81 parsec

Light-years 123.31 ly

V-band magnitude

6.68 mag

Voyager-speed travel 2,174,528 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.422 mas

Total Proper Motion

367.360 mas/yr

PM Right Ascension

-200.16 mas/yr

PM Declination

-308.04 mas/yr

Galactic Cartesian (pc)

x = -0.807 · y = -0.265 · z = -0.528

Equatorial (J2000)

RA 198.18340° · Dec -31.87468°

Galactic ℓ, b

308.194° · 30.779°

Ecliptic λ, β

209.319° · -22.276°

HTM-20 index

1646380112

Observation Record

Photometric series

RV measurements

Archive notes