Key parameters at a glance

A radius of 12.90 Earth radii
A mass of 1,398.45 Earth masses
Surface gravity around 8.40 g
An orbital period of 1,056.400 days
Semi-major axis 2.5000 AU
Distance from Earth 372.36 light-years
Earth Similarity Index 0.423
Travel time at Voyager 1 speed 6,566,555 years

HD 111591 b Planet Profile

Physical Specs

Radius

12.90 R⊕

Radius (Jupiter)

1.150 R♃

Mass

1,398.45 M⊕

Mass (Jupiter)

4.400 M♃

Density

3.58 g/cm³

Surface Gravity

8.40 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.423

HZ Position Unknown

Controversial No

Discovery

Year 2017

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1011of 1771

top 57.0%

This planet

12.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 55696 b 12.90 R⊕ HD 24040 b 12.90 R⊕ BD-210397 c 12.90 R⊕

Metric	Earth	HD 111591 b	Jupiter
Radius (R⊕)	1.00	12.90	11.21
Mass (M⊕)	1.00	1,398.45	317.83
Density (g/cm³)	5.51	3.58	1.33
Surface Gravity (g)	1.00	8.40	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,398.452 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 111591

HIP

HIP 62653

TIC

TIC 954124944

Gaia DR2

Gaia DR2 3955257343054729984

Gaia DR3

Gaia DR3 3955257343054729984

System

HD 111591

Percentile among Gas Giant cohort

Radius 12.900 R⊕ · percentile 41 / cohort 1771

Mass 1,398.452 M⊕ · percentile 73 / cohort 1747

Orbital period 1,056.40 d · percentile 78 / cohort 1533

Distance 114.17 pc · percentile 37 / cohort 1759

ESI 0.423 · percentile 92 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,056.400 days

Semi-major axis

2.5000 AU

Eccentricity

0.260

Inclination

— °

Year Length

A year here lasts about 2.89 Earth years on a mildly elliptical path at a mean orbital distance of 2.5000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.423

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Jeong et al. 2018

Instrument

Multiple Instruments

Publication

2018-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2017 at Multiple Observatories (12 shown).

GJ 625 b · Super-Earth TRAPPIST-1 e · Rocky Terrestrial TRAPPIST-1 f · Rocky Terrestrial TRAPPIST-1 g · Rocky Terrestrial TRAPPIST-1 h · Rocky Terrestrial HD 34445 e · Neptune-like BD+03 2562 b · Gas Giant HD 34445 d · Neptune-like MOA-2012-BLG-006L b · Gas Giant HD 76920 b · Gas Giant HD 34445 f · Neptune-like HD 40956 b · Gas Giant

Host System: HD 111591

Spectral Class

K-type orange

Effective Temperature

4,884 K — cooler than the Sun (5,778 K)

Estimated Age

1.41 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

8.030 R☉

Stellar Mass

1.940 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

3.100 dex

Systemic radial velocity

5.67 km/s

Rotational v·sin i

3.10 km/s

Metallicity ratio

[Fe/H]

Distance

114.17 parsec

Light-years 372.36 ly

V-band magnitude

6.42 mag

Voyager-speed travel 6,566,555 yr

Astrometric Data

Parallax

8.731 mas

Total Proper Motion

122.607 mas/yr

PM Right Ascension

103.62 mas/yr

PM Declination

-65.55 mas/yr

Galactic Cartesian (pc)

x = -0.899 · y = -0.201 · z = 0.389

Equatorial (J2000)

RA 192.57255° · Dec 22.86313°

Galactic ℓ, b

299.381° · 85.727°

Ecliptic λ, β

181.873° · 25.865°

HTM-20 index

173334064

Similar Worlds

HD 112640 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 1,054.6 ly

HIP 66074 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 115.6 ly

HIP 70849 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 78.5 ly

HD 102272 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 1,132.1 ly

GJ 86 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 35.2 ly

BD-210397 c

Gas Giant · K-type orange

Radius 12.90 R⊕ · 77.4 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Multiple Observatories Mission K-type orange Hosts