Key parameters at a glance

A radius of 12.70 Earth radii
A mass of 107.74 Earth masses
Surface gravity around 0.67 g
An orbital period of 1,257.253 days
Semi-major axis 2.2490 AU
Distance from Earth 238.41 light-years
Earth Similarity Index 0.261
Travel time at Voyager 1 speed 4,204,313 years

HD 126614 b Planet Profile

Physical Specs

Radius

12.70 R⊕

Radius (Jupiter)

1.140 R♃

Mass

107.74 M⊕

Mass (Jupiter)

0.339 M♃

Density

0.29 g/cm³

Surface Gravity

0.67 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.261

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#1130of 1771

top 63.7%

This planet

12.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 168863 b 12.70 R⊕ HD 233604 b 12.70 R⊕ Kepler-424 c 12.70 R⊕

Metric	Earth	HD 126614 b	Jupiter
Radius (R⊕)	1.00	12.70	11.21
Mass (M⊕)	1.00	107.74	317.83
Density (g/cm³)	5.51	0.29	1.33
Surface Gravity (g)	1.00	0.67	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	107.744 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	113.147 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 126614

HIP

HIP 70623

TIC

TIC 287973473

Gaia DR2

Gaia DR2 3641697998570813952

Gaia DR3

Gaia DR3 3641697998570813952

System

HD 126614

Percentile among Gas Giant cohort

Radius 12.700 R⊕ · percentile 34 / cohort 1771

Mass 107.744 M⊕ · percentile 6 / cohort 1747

Orbital period 1,257.25 d · percentile 80 / cohort 1533

Distance 73.10 pc · percentile 29 / cohort 1759

ESI 0.261 · percentile 48 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,257.253 days

Semi-major axis

2.2490 AU

Eccentricity

0.548

Inclination

97.48 °

Year Length

A year here lasts about 3.44 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.2490 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

7.760 m/s

Transit mid-time (BJD)

2,457,930.0000

Long. of periastron (ω)

304.92°

Angular separation (arcsec)

30.80000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.261

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Howard et al. 2010

Instrument

HIRES Spectrometer

Publication

2010-10

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at W. M. Keck Observatory (12 shown).

HD 13931 b · Gas Giant HAT-P-13 c · Gas Giant HD 181342 b · Gas Giant HD 212771 b · Gas Giant HD 136418 b · Gas Giant HIP 79431 b · Gas Giant HD 206610 b · Gas Giant HD 4313 b · Gas Giant HD 180902 b · Gas Giant HD 95089 b · Gas Giant GJ 179 b · Gas Giant HD 34445 b · Gas Giant

Host System: HD 126614

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,568 K — cooler than the Sun (5,778 K)

Estimated Age

7.20 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.370 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

0.56

Extended Stellar Properties

Surface gravity (log g)

4.174 dex

Stellar density

0.558 g/cm³

Systemic radial velocity

-32.50 km/s

Rotational v·sin i

1.50 km/s

Activity index (log R'HK)

-5.140

Metallicity ratio

[Fe/H]

Distance

73.10 parsec

Light-years 238.41 ly

V-band magnitude

8.81 mag

Voyager-speed travel 4,204,313 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

13.652 mas

Total Proper Motion

209.178 mas/yr

PM Right Ascension

-149.88 mas/yr

PM Declination

-145.92 mas/yr

Galactic Cartesian (pc)

x = -0.798 · y = -0.595 · z = -0.090

Equatorial (J2000)

RA 216.70052° · Dec -5.17841°

Galactic ℓ, b

342.011° · 50.315°

Ecliptic λ, β

216.082° · 8.856°

HTM-20 index

1066628170

Observation Record

Photometric series

Stellar spectra

Archive notes