Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 658.54 Earth masses
Surface gravity around 3.67 g
An orbital period of 2,751.534 days
Semi-major axis 4.8900 AU
Distance from Earth 743.25 light-years
Earth Similarity Index 0.367
Travel time at Voyager 1 speed 13,107,170 years

HD 145934 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.190 R♃

Mass

658.54 M⊕

Mass (Jupiter)

2.072 M♃

Density

1.50 g/cm³

Surface Gravity

3.67 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.367

HZ Position Unknown

Controversial No

Discovery

Year 2015

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 145934 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	658.54	317.83
Density (g/cm³)	5.51	1.50	1.33
Surface Gravity (g)	1.00	3.67	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	658.540 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	648.370 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 145934

TIC

TIC 119974993

Gaia DR2

Gaia DR2 4463442512084825728

Gaia DR3

Gaia DR3 4463442512084825728

System

HD 145934

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 658.540 M⊕ · percentile 56 / cohort 1747

Orbital period 2,751.53 d · percentile 88 / cohort 1533

Distance 227.88 pc · percentile 54 / cohort 1759

ESI 0.367 · percentile 76 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2,751.534 days

Semi-major axis

4.8900 AU

Eccentricity

0.078

Inclination

81.96 °

Year Length

A year here lasts about 7.53 Earth years on a nearly circular orbit at a mean orbital distance of 4.8900 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

18.427 m/s

Transit mid-time (BJD)

2,455,976.0000

Long. of periastron (ω)

186.32°

Angular separation (arcsec)

21.50000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.367

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Feng et al. 2015

Instrument

HIRES Spectrometer

Publication

2015-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2015 at W. M. Keck Observatory (3 shown).

HD 32963 b · Gas Giant HD 7924 c · Unclassified HD 7924 d · Unclassified

Host System: HD 145934

Spectral Class

K-type orange

Effective Temperature

4,824 K — cooler than the Sun (5,778 K)

Estimated Age

1.56 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

6.931 R☉

Stellar Mass

2.058 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

3.011 dex

Systemic radial velocity

-28.20 km/s

Metallicity ratio

[Fe/H]

Distance

227.88 parsec

Light-years 743.25 ly

V-band magnitude

8.50 mag

Voyager-speed travel 13,107,170 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

4.360 mas

Total Proper Motion

9.182 mas/yr

PM Right Ascension

9.06 mas/yr

PM Declination

-1.47 mas/yr

Galactic Cartesian (pc)

x = -0.438 · y = -0.870 · z = 0.229

Equatorial (J2000)

RA 243.29122° · Dec 13.23945°

Galactic ℓ, b

26.928° · 41.017°

Ecliptic λ, β

238.235° · 33.781°

HTM-20 index

-693238658

Similar Worlds

HD 93083 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 93.0 ly

Kepler-48 e

Gas Giant · K-type orange

Radius 13.40 R⊕ · 1,000.4 ly

HD 47366 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 275.1 ly

HIP 114933 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 331.9 ly

HD 114783 c

Gas Giant · K-type orange

Radius 13.40 R⊕ · 68.7 ly

HD 4732 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 178.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries W. M. Keck Observatory Mission K-type orange Hosts