Key parameters at a glance

A radius of 12.10 Earth radii
A mass of 6,315.57 Earth masses
Surface gravity around 43.14 g
An orbital period of 1,124.791 days
Semi-major axis 2.9490 AU
Distance from Earth 365.59 light-years
Earth Similarity Index 0.293
Travel time at Voyager 1 speed 6,447,149 years

HD 139357 b Planet Profile

Physical Specs

Radius

12.10 R⊕

Radius (Jupiter)

1.080 R♃

Mass

6,315.57 M⊕

Mass (Jupiter)

19.871 M♃

Density

19.60 g/cm³

Surface Gravity

43.14 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.293

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility Thueringer Landessternwarte Tautenburg

Telescope 2.0 m Alfred Jensch Telescope

Size rank in cohort

Rank by radius

#1454of 1771

top 82.0%

This planet

12.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 62364 b 12.10 R⊕ HD 106515 A b 12.10 R⊕ BD+20 2457 b 12.10 R⊕

Metric	Earth	HD 139357 b	Jupiter
Radius (R⊕)	1.00	12.10	11.21
Mass (M⊕)	1.00	6,315.57	317.83
Density (g/cm³)	5.51	19.60	1.33
Surface Gravity (g)	1.00	43.14	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	6,315.568 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	3,210.067 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 139357

HIP

HIP 76311

TIC

TIC 224312054

Gaia DR2

Gaia DR2 1597757387783227008

Gaia DR3

Gaia DR3 1597757387783227008

System

HD 139357

Percentile among Gas Giant cohort

Radius 12.100 R⊕ · percentile 16 / cohort 1771

Mass 6,315.568 M⊕ · percentile 96 / cohort 1747

Orbital period 1,124.79 d · percentile 79 / cohort 1533

Distance 112.09 pc · percentile 37 / cohort 1759

ESI 0.293 · percentile 56 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,124.791 days

Semi-major axis

2.9490 AU

Eccentricity

0.099

Inclination

103.24 °

Year Length

A year here lasts about 3.08 Earth years on a nearly circular orbit at a mean orbital distance of 2.9490 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.293

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Doellinger et al. 2009

Instrument

Coude Echelle Spectrograph

Publication

2009-06

Observation locale

Ground

Host System: HD 139357

Spectral Class

K-type orange

Effective Temperature

4,700 K — cooler than the Sun (5,778 K)

Estimated Age

3.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

11.470 R☉

Stellar Mass

2.690 M☉

Metallicity [Fe/H]

-0.13

Extended Stellar Properties

Surface gravity (log g)

2.900 dex

Systemic radial velocity

-8.04 km/s

Metallicity ratio

[Fe/H]

Distance

112.09 parsec

Light-years 365.59 ly

V-band magnitude

5.97 mag

Voyager-speed travel 6,447,149 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.893 mas

Total Proper Motion

18.849 mas/yr

PM Right Ascension

-18.77 mas/yr

PM Declination

1.76 mas/yr

Galactic Cartesian (pc)

x = -0.348 · y = -0.475 · z = 0.808

Equatorial (J2000)

RA 233.81736° · Dec 53.92215°

Galactic ℓ, b

86.160° · 49.847°

Ecliptic λ, β

198.240° · 68.527°

HTM-20 index

-1700634414

Similar Worlds

HD 184010 b

Gas Giant · K-type orange

Radius 12.10 R⊕ · 198.3 ly

tau Gem b

Gas Giant · K-type orange

Radius 12.10 R⊕ · 367.0 ly

KIC 3526061 b

Gas Giant · K-type orange

Radius 12.10 R⊕ · 1,308.6 ly

HIP 948 b

Gas Giant · K-type orange

Radius 12.10 R⊕ · 113.7 ly

HD 109988 b

Gas Giant · K-type orange

Radius 12.10 R⊕ · 138.7 ly

BD+20 2457 b

Gas Giant · K-type orange

Radius 12.10 R⊕ · 5,021.9 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Thueringer Landessternwarte Tautenburg Mission K-type orange Hosts