Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 657.90 Earth masses
Surface gravity around 3.66 g
An orbital period of 2,372.000 days
Semi-major axis 3.4100 AU
Distance from Earth 124.20 light-years
Earth Similarity Index 0.367
Travel time at Voyager 1 speed 2,190,190 years

HD 32963 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.190 R♃

Mass

657.90 M⊕

Mass (Jupiter)

2.070 M♃

Density

1.50 g/cm³

Surface Gravity

3.66 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.367

HZ Position Unknown

Controversial No

Discovery

Year 2015

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I 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 32963 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	657.90	317.83
Density (g/cm³)	5.51	1.50	1.33
Surface Gravity (g)	1.00	3.66	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	657.905 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	222.481 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 32963

HIP

HIP 23884

TIC

TIC 69528586

Gaia DR2

Gaia DR2 3421680597955802624

Gaia DR3

Gaia DR3 3421680597955802624

System

HD 32963

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 657.905 M⊕ · percentile 56 / cohort 1747

Orbital period 2,372.00 d · percentile 86 / cohort 1533

Distance 38.08 pc · percentile 13 / cohort 1759

ESI 0.367 · percentile 76 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2,372.000 days

Semi-major axis

3.4100 AU

Eccentricity

0.070

Inclination

19.30 °

Year Length

A year here lasts about 6.49 Earth years on a nearly circular orbit at a mean orbital distance of 3.4100 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

11.100 m/s

Transit mid-time (BJD)

2,455,371.0000

Long. of periastron (ω)

107.00°

Angular separation (arcsec)

89.60000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.367

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

Rowan et al. 2016

Instrument

HIRES Spectrometer

Publication

2016-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2015 at W. M. Keck Observatory (3 shown).

HD 145934 b · Gas Giant HD 7924 c · Unclassified HD 7924 d · Unclassified

Host System: HD 32963

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,727 K — cooler than the Sun (5,778 K)

Estimated Age

4.99 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.111 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

1.127 g/cm³

Systemic radial velocity

-62.90 km/s

Rotational v·sin i

1.20 km/s

Activity index (log R'HK)

-5.020

Metallicity ratio

[Fe/H]

Distance

38.08 parsec

Light-years 124.20 ly

V-band magnitude

7.60 mag

Voyager-speed travel 2,190,190 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.233 mas

Total Proper Motion

96.102 mas/yr

PM Right Ascension

-69.84 mas/yr

PM Declination

-66.02 mas/yr

Galactic Cartesian (pc)

x = 0.202 · y = 0.873 · z = 0.444

Equatorial (J2000)

RA 76.98201° · Dec 26.32768°

Galactic ℓ, b

177.532° · -8.390°

Ecliptic λ, β

78.328° · 3.414°

HTM-20 index

762839672