Key parameters at a glance

A radius of 13.30 Earth radii
A mass of 740.54 Earth masses
Surface gravity around 4.19 g
An orbital period of 705.000 days
Semi-major axis 1.5800 AU
Distance from Earth 414.42 light-years
Earth Similarity Index 0.378
Travel time at Voyager 1 speed 7,308,245 years

HD 82886 b Planet Profile

Physical Specs

Radius

13.30 R⊕

Radius (Jupiter)

1.190 R♃

Mass

740.54 M⊕

Mass (Jupiter)

2.330 M♃

Density

1.73 g/cm³

Surface Gravity

4.19 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.378

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I 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 82886 b	Jupiter
Radius (R⊕)	1.00	13.30	11.21
Mass (M⊕)	1.00	740.54	317.83
Density (g/cm³)	5.51	1.73	1.33
Surface Gravity (g)	1.00	4.19	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	740.544 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 82886

HIP

HIP 47087

TIC

TIC 8915600

Gaia DR2

Gaia DR2 797597520179672064

Gaia DR3

Gaia DR3 797597524475897600

System

HD 82886

Percentile among Gas Giant cohort

Radius 13.300 R⊕ · percentile 53 / cohort 1771

Mass 740.544 M⊕ · percentile 59 / cohort 1747

Orbital period 705.00 d · percentile 73 / cohort 1533

Distance 127.06 pc · percentile 40 / cohort 1759

ESI 0.378 · percentile 79 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

705.000 days

Semi-major axis

1.5800 AU

Eccentricity

0.070

Inclination

— °

Year Length

A year here lasts about 1.93 Earth years on a nearly circular orbit at a mean orbital distance of 1.5800 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.378

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2011

Instrument

HIRES Spectrometer

Publication

2011-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2011 at W. M. Keck Observatory (12 shown).

HD 5891 b · Gas Giant HD 102329 b · Gas Giant HD 18742 b · Gas Giant HD 142245 b · Gas Giant CFBDSIR J145829+101343 b · Gas Giant HD 1502 b · Gas Giant HD 108863 b · Gas Giant HD 106270 b · Gas Giant HD 98219 b · Gas Giant HD 152581 b · Gas Giant HD 131496 b · Gas Giant HD 30856 b · Gas Giant

Host System: HD 82886

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,953 K — cooler than the Sun (5,778 K)

Estimated Age

7.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

5.260 R☉

Stellar Mass

2.530 M☉

Metallicity [Fe/H]

-0.31

Extended Stellar Properties

Surface gravity (log g)

3.400 dex

Systemic radial velocity

12.73 km/s

Rotational v·sin i

0.43 km/s

Metallicity ratio

[Fe/H]

Distance

127.06 parsec

Light-years 414.42 ly

V-band magnitude

7.62 mag

Voyager-speed travel 7,308,245 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

7.842 mas

Total Proper Motion

38.969 mas/yr

PM Right Ascension

16.36 mas/yr

PM Declination

-35.37 mas/yr

Galactic Cartesian (pc)

x = -0.664 · y = 0.483 · z = 0.570

Equatorial (J2000)

RA 143.93835° · Dec 34.78059°

Galactic ℓ, b

190.028° · 47.769°

Ecliptic λ, β

134.715° · 19.332°

HTM-20 index

-461341240