Key parameters at a glance

A radius of 10.10 Earth radii
A mass of 72.47 Earth masses
Surface gravity around 0.71 g
An orbital period of 62.250 days
Semi-major axis 0.2950 AU
Distance from Earth 36.31 light-years
Earth Similarity Index 0.303
Travel time at Voyager 1 speed 640,378 years

HD 3651 b Planet Profile

Physical Specs

Radius

10.10 R⊕

Radius (Jupiter)

0.899 R♃

Mass

72.47 M⊕

Mass (Jupiter)

0.228 M♃

Density

0.39 g/cm³

Surface Gravity

0.71 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.303

HZ Position Unknown

Controversial No

Discovery

Year 2003

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1759of 1771

top 99.3%

This planet

10.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 204941 b 10.10 R⊕ KMT-2018-BLG-0087L b 10.10 R⊕ TOI-216.01 10.10 R⊕

Metric	Earth	HD 3651 b	Jupiter
Radius (R⊕)	1.00	10.10	11.21
Mass (M⊕)	1.00	72.47	317.83
Density (g/cm³)	5.51	0.39	1.33
Surface Gravity (g)	1.00	0.71	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	72.465 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 3651

HIP

HIP 3093

TIC

TIC 434210589

Gaia DR2

Gaia DR2 2802397960855105920

Gaia DR3

Gaia DR3 2802397960855105920

System

HD 3651

Percentile among Gas Giant cohort

Radius 10.100 R⊕ · percentile 0 / cohort 1771

Mass 72.465 M⊕ · percentile 1 / cohort 1747

Orbital period 62.25 d · percentile 51 / cohort 1533

Distance 11.13 pc · percentile 1 / cohort 1759

ESI 0.303 · percentile 59 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

62.250 days

Semi-major axis

0.2950 AU

Eccentricity

0.645

Inclination

— °

Year Length

A year here lasts approximately 62.25 Earth days (17.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.2950 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

16.600 m/s

Transit mid-time (BJD)

2,454,414.1000

Long. of periastron (ω)

243.00°

Angular separation (arcsec)

26.50000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.303

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Fischer et al. 2003

Instrument

Multiple Instruments

Publication

2003-06

Observation locale

Ground

Host System: HD 3651

Spectral Class

K-type orange

Effective Temperature

5,221 K — cooler than the Sun (5,778 K)

Estimated Age

3.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.872 R☉

Stellar Mass

0.799 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.905 g/cm³

Systemic radial velocity

-33.50 km/s

Rotational v·sin i

1.10 km/s

Rotation period

48.00 days

Activity index (log R'HK)

-5.020

Metallicity ratio

[M/H]

Distance

11.13 parsec

Light-years 36.31 ly

V-band magnitude

5.88 mag

Voyager-speed travel 640,378 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

89.789 mas

Total Proper Motion

591.826 mas/yr

PM Right Ascension

-462.06 mas/yr

PM Declination

-369.81 mas/yr

Galactic Cartesian (pc)

x = 0.918 · y = 0.159 · z = 0.362

Equatorial (J2000)

RA 9.83872° · Dec 21.24888°

Galactic ℓ, b

119.170° · -41.535°

Ecliptic λ, β

17.538° · 15.615°

HTM-20 index

-841548852

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes

Similar Worlds

HD 122562 c

Gas Giant · K-type orange

Radius 10.10 R⊕ · 173.7 ly

TOI-216.01

Gas Giant · K-type orange

Radius 10.10 R⊕ · 580.4 ly

HD 204941 b

Gas Giant · K-type orange

Radius 10.10 R⊕ · 93.7 ly

WASP-132 b

Gas Giant · K-type orange

Radius 10.10 R⊕ · 400.9 ly

CoRoT-29 b

Gas Giant · K-type orange

Radius 10.09 R⊕ · 2,630.5 ly

WASP-145 A b

Gas Giant · K-type orange

Radius 10.09 R⊕ · 297.8 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Multiple Observatories Mission K-type orange Hosts