Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 642.01 Earth masses
Surface gravity around 3.58 g
An orbital period of 2,166.000 days
Semi-major axis 3.2700 AU
Distance from Earth 104.40 light-years
Earth Similarity Index 0.366
Travel time at Voyager 1 speed 1,841,162 years

HD 89307 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.190 R♃

Mass

642.01 M⊕

Mass (Jupiter)

2.020 M♃

Density

1.47 g/cm³

Surface Gravity

3.58 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.366

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

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 89307 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	642.01	317.83
Density (g/cm³)	5.51	1.47	1.33
Surface Gravity (g)	1.00	3.58	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	642.013 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	670.621 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 89307

HIP

HIP 50473

TIC

TIC 61125572

Gaia DR2

Gaia DR2 3886688327612984704

Gaia DR3

Gaia DR3 3886688327612984704

System

HD 89307

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 642.013 M⊕ · percentile 55 / cohort 1747

Orbital period 2,166.00 d · percentile 86 / cohort 1533

Distance 32.01 pc · percentile 9 / cohort 1759

ESI 0.366 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2,166.000 days

Semi-major axis

3.2700 AU

Eccentricity

0.200

Inclination

72.00 °

Year Length

A year here lasts about 5.93 Earth years on a mildly elliptical path at a mean orbital distance of 3.2700 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.366

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 86264 b · Gas Giant 47 UMa d · Gas Giant HD 30562 b · Gas Giant

Host System: HD 89307

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,955 K — hotter than the Sun (5,778 K)

Estimated Age

2.31 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.100 R☉

Stellar Mass

1.270 M☉

Metallicity [Fe/H]

-0.13

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

1.179 g/cm³

Systemic radial velocity

23.29 km/s

Rotational v·sin i

3.21 km/s

Activity index (log R'HK)

-4.950

Metallicity ratio

[Fe/H]

Distance

32.01 parsec

Light-years 104.40 ly

V-band magnitude

7.03 mag

Voyager-speed travel 1,841,162 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

31.211 mas

Total Proper Motion

275.217 mas/yr

PM Right Ascension

-272.38 mas/yr

PM Declination

-39.42 mas/yr

Galactic Cartesian (pc)

x = -0.881 · y = 0.419 · z = 0.218

Equatorial (J2000)

RA 154.58750° · Dec 12.62094°

Galactic ℓ, b

227.303° · 51.395°

Ecliptic λ, β

151.871° · 1.942°

HTM-20 index

183480832

Observation Record

Photometric series

RV measurements

Archive notes