Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 390.93 Earth masses
Surface gravity around 2.08 g
An orbital period of 328.550 days
Semi-major axis 0.9930 AU
Distance from Earth 251.78 light-years
Earth Similarity Index 0.325
Travel time at Voyager 1 speed 4,440,192 years

1 sibling around HD 148164

HD 148164 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 148164 b this	Gas Giant	13.70	390.93	328.550	—	2018
HD 148164 c	Gas Giant	12.80	1,640.00	5,062.000	—	2018

HD 148164 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.220 R♃

Mass

390.93 M⊕

Mass (Jupiter)

1.230 M♃

Density

0.84 g/cm³

Surface Gravity

2.08 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.325

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I 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 159243 b 13.70 R⊕ HD 114783 b 13.70 R⊕ HD 100508 b 13.70 R⊕

Metric	Earth	HD 148164 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	390.93	317.83
Density (g/cm³)	5.51	0.84	1.33
Surface Gravity (g)	1.00	2.08	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	390.931 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 148164

HIP

HIP 80484

TIC

TIC 323319664

Gaia DR2

Gaia DR2 4459907547841472128

Gaia DR3

Gaia DR3 4459907547841472128

System

HD 148164

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 390.931 M⊕ · percentile 41 / cohort 1747

Orbital period 328.55 d · percentile 62 / cohort 1533

Distance 77.20 pc · percentile 30 / cohort 1759

ESI 0.325 · percentile 64 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

328.550 days

Semi-major axis

0.9930 AU

Eccentricity

0.587

Inclination

— °

Year Length

A year here lasts approximately 328.55 Earth days (90.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.9930 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.325

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Ment et al. 2018

Instrument

HIRES Spectrometer

Publication

2018-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2018 at W. M. Keck Observatory (12 shown).

HD 75784 c · Gas Giant HD 99706 c · Gas Giant HD 148164 c · Gas Giant HD 55696 b · Gas Giant HD 95089 c · Gas Giant HD 13167 b · Gas Giant HD 18015 b · Gas Giant HAT-P-11 c · Gas Giant HD 156279 c · Gas Giant HD 98736 b · Gas Giant HD 180053 b · Gas Giant HD 114783 c · Gas Giant

Host System: HD 148164

Spectral Class

F-type yellow-white

Effective Temperature

6,032 K — hotter than the Sun (5,778 K)

Estimated Age

2.41 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.340 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.24

Extended Stellar Properties

Surface gravity (log g)

4.158 dex

Stellar density

0.507 g/cm³

Systemic radial velocity

-64.63 km/s

Rotational v·sin i

4.00 km/s

Metallicity ratio

[Fe/H]

Distance

77.20 parsec

Light-years 251.78 ly

V-band magnitude

8.23 mag

Voyager-speed travel 4,440,192 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.925 mas

Total Proper Motion

88.524 mas/yr

PM Right Ascension

-88.51 mas/yr

PM Declination

1.57 mas/yr

Galactic Cartesian (pc)

x = -0.391 · y = -0.897 · z = 0.207

Equatorial (J2000)

RA 246.43517° · Dec 11.91907°

Galactic ℓ, b

27.051° · 37.678°

Ecliptic λ, β

242.157° · 33.109°

HTM-20 index

152517994