Key parameters at a glance

A radius of 14.00 Earth radii
A mass of 235.18 Earth masses
Surface gravity around 1.20 g
An orbital period of 842.200 days
Semi-major axis 1.8800 AU
Distance from Earth 185.47 light-years
Earth Similarity Index 0.284
Travel time at Voyager 1 speed 3,270,768 years

HD 156411 b Planet Profile

Physical Specs

Radius

14.00 R⊕

Radius (Jupiter)

1.250 R♃

Mass

235.18 M⊕

Mass (Jupiter)

0.740 M♃

Density

0.47 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.284

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#415of 1771

top 23.4%

This planet

14.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 9446 b 14.00 R⊕ HD 8535 b 14.00 R⊕ HD 224693 b 14.00 R⊕

Metric	Earth	HD 156411 b	Jupiter
Radius (R⊕)	1.00	14.00	11.21
Mass (M⊕)	1.00	235.18	317.83
Density (g/cm³)	5.51	0.47	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	235.180 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 156411

HIP

HIP 84787

TIC

TIC 412409409

Gaia DR2

Gaia DR2 5950535424666050304

Gaia DR3

Gaia DR3 5950535424666050304

System

HD 156411

Percentile among Gas Giant cohort

Radius 14.000 R⊕ · percentile 74 / cohort 1771

Mass 235.180 M⊕ · percentile 25 / cohort 1747

Orbital period 842.20 d · percentile 74 / cohort 1533

Distance 56.87 pc · percentile 24 / cohort 1759

ESI 0.284 · percentile 53 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

842.200 days

Semi-major axis

1.8800 AU

Eccentricity

0.220

Inclination

— °

Year Length

A year here lasts about 2.31 Earth years on a mildly elliptical path at a mean orbital distance of 1.8800 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.284

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Naef et al. 2010

Instrument

HARPS Spectrograph

Publication

2010-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at La Silla Observatory (12 shown).

GJ 581 e · Super-Earth HD 125612 c · Neptune-like HD 90156 b · Neptune-like HD 147018 c · Gas Giant HD 103197 b · Neptune-like HD 125612 d · Gas Giant HIP 70849 b · Gas Giant HD 85390 b · Neptune-like HD 190984 b · Gas Giant HD 171238 b · Gas Giant HD 290327 b · Gas Giant HD 147018 b · Gas Giant

Host System: HD 156411

Spectral Class

F-type yellow-white

Effective Temperature

5,900 K — hotter than the Sun (5,778 K)

Estimated Age

4.28 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.160 R☉

Stellar Mass

1.250 M☉

Metallicity [Fe/H]

-0.12

Extended Stellar Properties

Surface gravity (log g)

4.070 dex

Stellar density

0.120 g/cm³

Systemic radial velocity

-38.75 km/s

Rotational v·sin i

3.30 km/s

Metallicity ratio

[Fe/H]

Distance

56.87 parsec

Light-years 185.47 ly

V-band magnitude

6.67 mag

Voyager-speed travel 3,270,768 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

17.557 mas

Total Proper Motion

214.136 mas/yr

PM Right Ascension

-33.18 mas/yr

PM Declination

-211.55 mas/yr

Galactic Cartesian (pc)

x = -0.115 · y = -0.652 · z = -0.750

Equatorial (J2000)

RA 259.96395° · Dec -48.55023°

Galactic ℓ, b

340.790° · -6.464°

Ecliptic λ, β

262.661° · -25.366°

HTM-20 index

1114077589