Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 371.22 Earth masses
Surface gravity around 1.98 g
An orbital period of 768.700 days
Semi-major axis 1.7900 AU
Distance from Earth 189.53 light-years
Earth Similarity Index 0.321
Travel time at Voyager 1 speed 3,342,377 years

HD 5608 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.220 R♃

Mass

371.22 M⊕

Mass (Jupiter)

1.168 M♃

Density

0.79 g/cm³

Surface Gravity

1.98 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.321

HZ Position Unknown

Controversial No

Discovery

Year 2012

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 m Telescope

Size rank in cohort

Rank by radius

#554of 1771

top 31.2%

This planet

13.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 148164 b 13.70 R⊕ HD 114783 b 13.70 R⊕ HD 159243 b 13.70 R⊕

Metric	Earth	HD 5608 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	371.22	317.83
Density (g/cm³)	5.51	0.79	1.33
Surface Gravity (g)	1.00	1.98	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	371.224 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 5608

HIP

HIP 4552

TIC

TIC 53873088

Gaia DR2

Gaia DR2 362706006713454208

Gaia DR3

Gaia DR3 362706006713454208

System

HD 5608

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 371.224 M⊕ · percentile 39 / cohort 1747

Orbital period 768.70 d · percentile 73 / cohort 1533

Distance 58.11 pc · percentile 24 / cohort 1759

ESI 0.321 · percentile 63 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

768.700 days

Semi-major axis

1.7900 AU

Eccentricity

0.110

Inclination

— °

Year Length

A year here lasts about 2.10 Earth years on a mildly elliptical path at a mean orbital distance of 1.7900 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.321

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Sato et al. 2012

Instrument

HIDES Echelle Spectrograph

Publication

2012-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2012 at Okayama Astrophysical Observatory (5 shown).

omi UMa b · Gas Giant 75 Cet b · Gas Giant omi CrB b · Gas Giant nu Oph b · Gas Giant nu Oph c · Gas Giant

Host System: HD 5608

Spectral Class

K-type orange

Effective Temperature

4,807 K — cooler than the Sun (5,778 K)

Estimated Age

1.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

5.430 R☉

Stellar Mass

1.290 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

3.060 dex

Systemic radial velocity

-22.80 km/s

Rotational v·sin i

1.37 km/s

Metallicity ratio

[Fe/H]

Distance

58.11 parsec

Light-years 189.53 ly

V-band magnitude

6.00 mag

Voyager-speed travel 3,342,377 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

17.180 mas

Total Proper Motion

80.032 mas/yr

PM Right Ascension

36.42 mas/yr

PM Declination

-71.27 mas/yr

Galactic Cartesian (pc)

x = 0.803 · y = 0.209 · z = 0.558

Equatorial (J2000)

RA 14.55943° · Dec 33.95058°

Galactic ℓ, b

124.543° · -28.900°

Ecliptic λ, β

27.244° · 25.432°

HTM-20 index

874411642

Similar Worlds

BD+15 2940 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 1,390.8 ly

HD 116029 c

Gas Giant · K-type orange

Radius 13.70 R⊕ · 402.0 ly

HD 114783 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 68.7 ly

HD 208897 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 220.1 ly

HD 100508 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 106.8 ly

HD 130322 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 104.0 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Okayama Astrophysical Observatory Mission K-type orange Hosts