Key parameters at a glance

A radius of 14.10 Earth radii
A mass of 198.00 Earth masses
Surface gravity around 1.00 g
An orbital period of 1,945.000 days
Semi-major axis 3.1600 AU
Distance from Earth 109.38 light-years
Earth Similarity Index 0.270
Travel time at Voyager 1 speed 1,928,962 years

1 sibling around HD 11964

HD 11964 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 11964 c	Neptune-like	5.38	25.00	37.910	—	2008
HD 11964 b this	Gas Giant	14.10	198.00	1,945.000	—	2005

HD 11964 b Planet Profile

Physical Specs

Radius

14.10 R⊕

Radius (Jupiter)

1.260 R♃

Mass

198.00 M⊕

Mass (Jupiter)

0.622 M♃

Density

0.39 g/cm³

Surface Gravity

1.00 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.270

HZ Position Unknown

Controversial No

Discovery

Year 2005

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#371of 1771

top 20.9%

This planet

14.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 27894 b 14.10 R⊕ HD 103720 b 14.10 R⊕ HD 216770 b 14.10 R⊕

Metric	Earth	HD 11964 b	Jupiter
Radius (R⊕)	1.00	14.10	11.21
Mass (M⊕)	1.00	198.00	317.83
Density (g/cm³)	5.51	0.39	1.33
Surface Gravity (g)	1.00	1.00	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	198.000 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 11964

HIP

HIP 9094

TIC

TIC 24978373

Gaia DR2

Gaia DR2 2462426800883134336

Gaia DR3

Gaia DR3 2462426800883134336

System

HD 11964

Percentile among Gas Giant cohort

Radius 14.100 R⊕ · percentile 77 / cohort 1771

Mass 198.000 M⊕ · percentile 19 / cohort 1747

Orbital period 1,945.00 d · percentile 85 / cohort 1533

Distance 33.54 pc · percentile 9 / cohort 1759

ESI 0.270 · percentile 50 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,945.000 days

Semi-major axis

3.1600 AU

Eccentricity

0.041

Inclination

— °

Year Length

A year here lasts about 5.33 Earth years on a nearly circular orbit at a mean orbital distance of 3.1600 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

9.410 m/s

Transit mid-time (BJD)

2,455,803.0000

Long. of periastron (ω)

26.00°

Angular separation (arcsec)

94.20000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.270

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Butler et al. 2006

Instrument

HIRES Spectrometer

Publication

2006-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2005 at W. M. Keck Observatory (12 shown).

GJ 876 d · Sub-Neptune HD 190360 c · Neptune-like HIP 14810 b · Gas Giant HD 128311 c · Gas Giant HD 66428 b · Gas Giant HD 50499 b · Gas Giant HD 107148 b · Neptune-like HD 108874 c · Gas Giant HD 109749 b · Gas Giant HD 37124 d · Gas Giant HD 99109 b · Gas Giant HD 164922 b · Gas Giant

Host System: HD 11964

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,303 K — cooler than the Sun (5,778 K)

Estimated Age

7.45 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

2.010 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

3.791 dex

Stellar density

0.158 g/cm³

Systemic radial velocity

-9.32 km/s

Rotational v·sin i

2.74 km/s

Activity index (log R'HK)

-5.160

Metallicity ratio

[M/H]

Distance

33.54 parsec

Light-years 109.38 ly

V-band magnitude

6.42 mag

Voyager-speed travel 1,928,962 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

29.789 mas

Total Proper Motion

439.807 mas/yr

PM Right Ascension

-366.96 mas/yr

PM Declination

-242.43 mas/yr

Galactic Cartesian (pc)

x = 0.858 · y = 0.481 · z = -0.178

Equatorial (J2000)

RA 29.28843° · Dec -10.24347°

Galactic ℓ, b

168.576° · -67.092°

Ecliptic λ, β

23.370° · -20.772°

HTM-20 index

1598494557

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes