Key parameters at a glance

A radius of 12.50 Earth radii
A mass of 3,117.26 Earth masses
Surface gravity around 19.95 g
An orbital period of 1,488.791 days
Semi-major axis 2.7630 AU
Distance from Earth 221.17 light-years
Earth Similarity Index 0.386
Travel time at Voyager 1 speed 3,900,309 years

HD 86264 b Planet Profile

Physical Specs

Radius

12.50 R⊕

Radius (Jupiter)

1.110 R♃

Mass

3,117.26 M⊕

Mass (Jupiter)

9.808 M♃

Density

8.77 g/cm³

Surface Gravity

19.95 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.386

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility Lick Observatory

Telescope 3.0 m C. Donald Shane Telescope

Size rank in cohort

Rank by radius

#1235of 1771

top 69.7%

This planet

12.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 156279 c 12.50 R⊕ HD 33283 b 12.50 R⊕ HD 156279 b 12.50 R⊕

Metric	Earth	HD 86264 b	Jupiter
Radius (R⊕)	1.00	12.50	11.21
Mass (M⊕)	1.00	3,117.26	317.83
Density (g/cm³)	5.51	8.77	1.33
Surface Gravity (g)	1.00	19.95	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,117.261 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	2,224.810 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 86264

HIP

HIP 48780

TIC

TIC 348964243

Gaia DR2

Gaia DR2 5685917541714610688

Gaia DR3

Gaia DR3 5685917541714610688

System

HD 86264

Percentile among Gas Giant cohort

Radius 12.500 R⊕ · percentile 28 / cohort 1771

Mass 3,117.261 M⊕ · percentile 87 / cohort 1747

Orbital period 1,488.79 d · percentile 82 / cohort 1533

Distance 67.81 pc · percentile 28 / cohort 1759

ESI 0.386 · percentile 81 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,488.791 days

Semi-major axis

2.7630 AU

Eccentricity

0.821

Inclination

93.59 °

Year Length

A year here lasts about 4.08 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.7630 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.386

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Fischer et al. 2009

Instrument

Hamilton Echelle Spectrograph

Publication

2009-10

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at Lick Observatory (5 shown).

HD 87883 b · Gas Giant HD 16175 b · Gas Giant HD 89307 b · Gas Giant 47 UMa d · Gas Giant HD 30562 b · Gas Giant

Host System: HD 86264

Spectral Class

F-type yellow-white

Effective Temperature

6,210 K — hotter than the Sun (5,778 K)

Estimated Age

2.24 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.880 R☉

Stellar Mass

1.260 M☉

Metallicity [Fe/H]

0.20

Extended Stellar Properties

Surface gravity (log g)

4.020 dex

Stellar density

0.380 g/cm³

Systemic radial velocity

7.66 km/s

Rotational v·sin i

12.80 km/s

Activity index (log R'HK)

-4.740

Metallicity ratio

[Fe/H]

Distance

67.81 parsec

Light-years 221.17 ly

V-band magnitude

7.41 mag

Voyager-speed travel 3,900,309 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

14.718 mas

Total Proper Motion

66.971 mas/yr

PM Right Ascension

-14.16 mas/yr

PM Declination

-65.46 mas/yr

Galactic Cartesian (pc)

x = -0.826 · y = 0.492 · z = -0.274

Equatorial (J2000)

RA 149.24093° · Dec -15.89540°

Galactic ℓ, b

253.160° · 29.655°

Ecliptic λ, β

157.496° · -26.547°

HTM-20 index

1632027706