Key parameters at a glance

A radius of 12.60 Earth radii
A mass of 2,510.84 Earth masses
Surface gravity around 15.82 g
An orbital period of 1,103.000 days
Semi-major axis 2.1800 AU
Distance from Earth 255.80 light-years
Earth Similarity Index 0.415
Travel time at Voyager 1 speed 4,511,066 years

HD 68402 b Planet Profile

Physical Specs

Radius

12.60 R⊕

Radius (Jupiter)

1.120 R♃

Mass

2,510.84 M⊕

Mass (Jupiter)

7.900 M♃

Density

6.90 g/cm³

Surface Gravity

15.82 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.415

HZ Position Unknown

Controversial No

Discovery

Year 2016

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1179of 1771

top 66.5%

This planet

12.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Kepler-419 c 12.60 R⊕ 2MASS J04414489+2301513 b 12.60 R⊕ HD 47536 b 12.60 R⊕

Metric	Earth	HD 68402 b	Jupiter
Radius (R⊕)	1.00	12.60	11.21
Mass (M⊕)	1.00	2,510.84	317.83
Density (g/cm³)	5.51	6.90	1.33
Surface Gravity (g)	1.00	15.82	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2,510.844 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	975.738 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 68402

HIP

HIP 39589

TIC

TIC 272546396

Gaia DR2

Gaia DR2 5214002100193281920

Gaia DR3

Gaia DR3 5214002100193281920

System

HD 68402

Percentile among Gas Giant cohort

Radius 12.600 R⊕ · percentile 31 / cohort 1771

Mass 2,510.844 M⊕ · percentile 83 / cohort 1747

Orbital period 1,103.00 d · percentile 78 / cohort 1533

Distance 78.43 pc · percentile 30 / cohort 1759

ESI 0.415 · percentile 90 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,103.000 days

Semi-major axis

2.1800 AU

Eccentricity

0.030

Inclination

20.30 °

Year Length

A year here lasts about 3.02 Earth years on a nearly circular orbit at a mean orbital distance of 2.1800 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.415

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

Jenkins et al. 2017

Instrument

Multiple Instruments

Publication

2017-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2016 at Multiple Observatories (12 shown).

HD 42618 b · Sub-Neptune HD 164922 c · Sub-Neptune HD 224538 b · Gas Giant HD 30177 c · Gas Giant Kepler-56 d · Gas Giant HD 72892 b · Gas Giant HD 147873 b · Gas Giant HIP 8541 b · Gas Giant HD 86950 b · Gas Giant HD 165155 b · Gas Giant rho CrB c · Neptune-like HIP 74890 b · Gas Giant

Host System: HD 68402

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,950 K — hotter than the Sun (5,778 K)

Estimated Age

2.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

1.120 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

1.160 g/cm³

Systemic radial velocity

11.60 km/s

Rotational v·sin i

2.90 km/s

Metallicity ratio

[Fe/H]

Distance

78.43 parsec

Light-years 255.80 ly

V-band magnitude

9.11 mag

Voyager-speed travel 4,511,066 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.721 mas

Total Proper Motion

111.103 mas/yr

PM Right Ascension

-78.19 mas/yr

PM Declination

78.93 mas/yr

Galactic Cartesian (pc)

x = -0.140 · y = 0.230 · z = -0.963

Equatorial (J2000)

RA 121.34746° · Dec -74.41007°

Galactic ℓ, b

287.055° · -21.307°

Ecliptic λ, β

230.981° · -77.168°

HTM-20 index

-238166806