Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 400.47 Earth masses
Surface gravity around 2.13 g
An orbital period of 464.400 days
Semi-major axis 1.3600 AU
Distance from Earth 446.69 light-years
Earth Similarity Index 0.327
Travel time at Voyager 1 speed 7,877,439 years

1 sibling around HD 95089

HD 95089 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HD 95089 b this	Gas Giant	13.70	400.47	464.400	—	2009
HD 95089 c	Gas Giant	13.10	1,096.51	1,785.000	—	2018

HD 95089 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.220 R♃

Mass

400.47 M⊕

Mass (Jupiter)

1.260 M♃

Density

0.86 g/cm³

Surface Gravity

2.13 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.327

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#554of 1771

top 31.2%

This planet

13.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 148164 b 13.70 R⊕ HD 114783 b 13.70 R⊕ HD 159243 b 13.70 R⊕

Metric	Earth	HD 95089 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	400.47	317.83
Density (g/cm³)	5.51	0.86	1.33
Surface Gravity (g)	1.00	2.13	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	400.466 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 95089

HIP

HIP 53666

TIC

TIC 345078350

Gaia DR2

Gaia DR2 3808410933735817472

Gaia DR3

Gaia DR3 3808410933735817472

System

HD 95089

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 400.466 M⊕ · percentile 42 / cohort 1747

Orbital period 464.40 d · percentile 66 / cohort 1533

Distance 136.96 pc · percentile 42 / cohort 1759

ESI 0.327 · percentile 65 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

464.400 days

Semi-major axis

1.3600 AU

Eccentricity

0.119

Inclination

— °

Year Length

A year here lasts about 1.27 Earth years on a mildly elliptical path at a mean orbital distance of 1.3600 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.327

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2010

Instrument

HIRES Spectrometer

Publication

2010-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at W. M. Keck Observatory (12 shown).

HD 13931 b · Gas Giant HAT-P-13 c · Gas Giant HD 181342 b · Gas Giant HD 212771 b · Gas Giant HD 136418 b · Gas Giant HIP 79431 b · Gas Giant HD 206610 b · Gas Giant HD 4313 b · Gas Giant HD 180902 b · Gas Giant GJ 179 b · Gas Giant HD 34445 b · Gas Giant GJ 649 b · Gas Giant

Host System: HD 95089

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,918 K — cooler than the Sun (5,778 K)

Estimated Age

2.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

5.080 R☉

Stellar Mass

1.540 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

3.240 dex

Systemic radial velocity

8.44 km/s

Rotational v·sin i

1.71 km/s

Metallicity ratio

[Fe/H]

Distance

136.96 parsec

Light-years 446.69 ly

V-band magnitude

7.92 mag

Voyager-speed travel 7,877,439 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

7.275 mas

Total Proper Motion

59.740 mas/yr

PM Right Ascension

-35.73 mas/yr

PM Declination

-47.88 mas/yr

Galactic Cartesian (pc)

x = -0.964 · y = 0.264 · z = 0.030

Equatorial (J2000)

RA 164.69875° · Dec 1.72901°

Galactic ℓ, b

251.413° · 52.943°

Ecliptic λ, β

165.236° · -4.430°

HTM-20 index

-1736487045

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes