Key parameters at a glance

A radius of 13.30 Earth radii
A mass of 794.58 Earth masses
Surface gravity around 4.49 g
An orbital period of 5,769.000 days
Semi-major axis 6.1500 AU
Distance from Earth 167.32 light-years
Earth Similarity Index 0.382
Travel time at Voyager 1 speed 2,950,613 years

HD 133131 B b Planet Profile

Physical Specs

Radius

13.30 R⊕

Radius (Jupiter)

1.180 R♃

Mass

794.58 M⊕

Mass (Jupiter)

2.500 M♃

Density

1.86 g/cm³

Surface Gravity

4.49 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.382

HZ Position Unknown

Controversial No

Discovery

Year 2016

Method Radial Velocity

Facility Las Campanas Observatory

Telescope 6.5 m Magellan II Clay Telescope

Size rank in cohort

Rank by radius

#793of 1771

top 44.7%

This planet

13.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 b 13.30 R⊕ HD 129445 b 13.30 R⊕ GJ 876 b 13.30 R⊕

Metric	Earth	HD 133131 B b	Jupiter
Radius (R⊕)	1.00	13.30	11.21
Mass (M⊕)	1.00	794.58	317.83
Density (g/cm³)	5.51	1.86	1.33
Surface Gravity (g)	1.00	4.49	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	794.575 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 133131 B

HIP

HIP 73674 B

TIC

TIC 440955225

Gaia DR2

Gaia DR2 6224633983987511552

Gaia DR3

Gaia DR3 6224633983987511552

System

HD 133131

Percentile among Gas Giant cohort

Radius 13.300 R⊕ · percentile 53 / cohort 1771

Mass 794.575 M⊕ · percentile 61 / cohort 1747

Orbital period 5,769.00 d · percentile 93 / cohort 1533

Distance 51.30 pc · percentile 20 / cohort 1759

ESI 0.382 · percentile 80 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

5,769.000 days

Semi-major axis

6.1500 AU

Eccentricity

0.610

Inclination

— °

Year Length

A year here lasts about 15.79 Earth years on a highly eccentric trajectory at a mean orbital distance of 6.1500 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.382

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Teske et al. 2016

Instrument

Carnegie Planet Finder Spectrograph

Publication

2016-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2016 at Las Campanas Observatory (2 shown).

HD 133131 A b · Gas Giant HD 133131 A c · Gas Giant

Host System: HD 133131 B

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,805 K — hotter than the Sun (5,778 K)

Estimated Age

9.70 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.990 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

-0.28

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

1.716 g/cm³

Systemic radial velocity

-15.34 km/s

Rotational v·sin i

7.00 km/s

Metallicity ratio

[Fe/H]

Distance

51.30 parsec

Light-years 167.32 ly

V-band magnitude

8.41 mag

Voyager-speed travel 2,950,613 yr

Multi-band Host Photometry — 7 bands

Astrometric Data

Parallax

19.465 mas

Total Proper Motion

211.222 mas/yr

PM Right Ascension

158.95 mas/yr

PM Declination

-139.10 mas/yr

Galactic Cartesian (pc)

x = -0.615 · y = -0.635 · z = -0.467

Equatorial (J2000)

RA 225.89997° · Dec -27.84159°

Galactic ℓ, b

335.539° · 26.535°

Ecliptic λ, β

231.306° · -10.131°

HTM-20 index

635075994