Key parameters at a glance

A radius of 13.50 Earth radii
A mass of 508.21 Earth masses
Surface gravity around 2.79 g
An orbital period of 606.300 days
Semi-major axis 1.5650 AU
Distance from Earth 236.76 light-years
Earth Similarity Index 0.348
Travel time at Voyager 1 speed 4,175,330 years

1 sibling around HD 200964

HD 200964 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 200964 b this	Gas Giant	13.50	508.21	606.300	—	2010
HD 200964 c	Gas Giant	13.70	385.85	852.500	—	2010

HD 200964 b Planet Profile

Physical Specs

Radius

13.50 R⊕

Radius (Jupiter)

1.210 R♃

Mass

508.21 M⊕

Mass (Jupiter)

1.599 M♃

Density

1.14 g/cm³

Surface Gravity

2.79 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.348

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Radial Velocity

Facility Lick Observatory

Telescope 3.0 m C. Donald Shane Telescope

Size rank in cohort

Rank by radius

#671of 1771

top 37.8%

This planet

13.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 45350 b 13.50 R⊕ HD 82943 b 13.50 R⊕ HD 27442 b 13.50 R⊕

Metric	Earth	HD 200964 b	Jupiter
Radius (R⊕)	1.00	13.50	11.21
Mass (M⊕)	1.00	508.21	317.83
Density (g/cm³)	5.51	1.14	1.33
Surface Gravity (g)	1.00	2.79	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	508.210 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 200964

HIP

HIP 104202

TIC

TIC 408316773

Gaia DR2

Gaia DR2 1732018855730384256

Gaia DR3

Gaia DR3 1732018855730384256

System

HD 200964

Percentile among Gas Giant cohort

Radius 13.500 R⊕ · percentile 59 / cohort 1771

Mass 508.210 M⊕ · percentile 49 / cohort 1747

Orbital period 606.30 d · percentile 70 / cohort 1533

Distance 72.59 pc · percentile 29 / cohort 1759

ESI 0.348 · percentile 70 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

606.300 days

Semi-major axis

1.5650 AU

Eccentricity

0.087

Inclination

— °

Year Length

A year here lasts about 1.66 Earth years on a nearly circular orbit at a mean orbital distance of 1.5650 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.348

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2010

Instrument

Hamilton Echelle Spectrograph

Publication

2011-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2010 at Lick Observatory (3 shown).

24 Sex b · Gas Giant HD 200964 c · Gas Giant 24 Sex c · Gas Giant

Host System: HD 200964

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,982 K — cooler than the Sun (5,778 K)

Estimated Age

3.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.920 R☉

Stellar Mass

1.390 M☉

Metallicity [Fe/H]

-0.15

Extended Stellar Properties

Surface gravity (log g)

3.220 dex

Systemic radial velocity

-71.68 km/s

Rotational v·sin i

2.28 km/s

Metallicity ratio

[Fe/H]

Distance

72.59 parsec

Light-years 236.76 ly

V-band magnitude

6.49 mag

Voyager-speed travel 4,175,330 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

13.747 mas

Total Proper Motion

107.292 mas/yr

PM Right Ascension

94.61 mas/yr

PM Declination

50.60 mas/yr

Galactic Cartesian (pc)

x = 0.726 · y = -0.685 · z = 0.066

Equatorial (J2000)

RA 316.66642° · Dec 3.80334°

Galactic ℓ, b

53.565° · -27.636°

Ecliptic λ, β

320.329° · 19.465°

HTM-20 index

1644256300