Key parameters at a glance

A radius of 13.60 Earth radii
A mass of 470.39 Earth masses
Surface gravity around 2.54 g
An orbital period of 2.138 days
Semi-major axis 0.0346 AU
Distance from Earth 338.99 light-years
Earth Similarity Index 0.340
Travel time at Voyager 1 speed 5,978,150 years

HD 86081 b Planet Profile

Physical Specs

Radius

13.60 R⊕

Radius (Jupiter)

1.210 R♃

Mass

470.39 M⊕

Mass (Jupiter)

1.480 M♃

Density

1.03 g/cm³

Surface Gravity

2.54 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.340

HZ Position Unknown

Controversial No

Discovery

Year 2006

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#609of 1771

top 34.3%

This planet

13.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 19994 b 13.60 R⊕ HD 205739 b 13.60 R⊕ HD 79498 b 13.60 R⊕

Metric	Earth	HD 86081 b	Jupiter
Radius (R⊕)	1.00	13.60	11.21
Mass (M⊕)	1.00	470.39	317.83
Density (g/cm³)	5.51	1.03	1.33
Surface Gravity (g)	1.00	2.54	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	470.388 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 86081

HIP

HIP 48711

TIC

TIC 62760824

Gaia DR2

Gaia DR2 3823126385045210880

Gaia DR3

Gaia DR3 3823126385045210880

System

HD 86081

Percentile among Gas Giant cohort

Radius 13.600 R⊕ · percentile 63 / cohort 1771

Mass 470.388 M⊕ · percentile 47 / cohort 1747

Orbital period 2.14 d · percentile 8 / cohort 1533

Distance 103.94 pc · percentile 35 / cohort 1759

ESI 0.340 · percentile 68 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.138 days

Semi-major axis

0.0346 AU

Eccentricity

0.012

Inclination

— °

Year Length

A year here lasts approximately 2.14 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0346 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.340

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2006

Instrument

HIRES Spectrometer

Publication

2006-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2006 at W. M. Keck Observatory (7 shown).

HD 24040 b · Gas Giant HIP 14810 c · Gas Giant HD 154345 b · Gas Giant HD 10647 b · Gas Giant GJ 849 b · Gas Giant HD 224693 b · Gas Giant HD 33283 b · Gas Giant

Host System: HD 86081

Spectral Class

F-type yellow-white

Effective Temperature

5,939 K — hotter than the Sun (5,778 K)

Estimated Age

3.61 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.460 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.22

Extended Stellar Properties

Surface gravity (log g)

4.180 dex

Stellar density

0.351 g/cm³

Systemic radial velocity

30.74 km/s

Rotational v·sin i

4.20 km/s

Metallicity ratio

[Fe/H]

Distance

103.94 parsec

Light-years 338.99 ly

V-band magnitude

8.73 mag

Voyager-speed travel 5,978,150 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.593 mas

Total Proper Motion

68.885 mas/yr

PM Right Ascension

-67.00 mas/yr

PM Declination

16.00 mas/yr

Galactic Cartesian (pc)

x = -0.855 · y = 0.514 · z = -0.066

Equatorial (J2000)

RA 149.02437° · Dec -3.80835°

Galactic ℓ, b

242.200° · 37.610°

Ecliptic λ, β

152.528° · -15.380°

HTM-20 index

-1659223196

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes