Key parameters at a glance

A radius of 13.50 Earth radii
A mass of 486.28 Earth masses
Surface gravity around 2.67 g
An orbital period of 521.000 days
Semi-major axis 1.5000 AU
Distance from Earth 309.40 light-years
Earth Similarity Index 0.345
Travel time at Voyager 1 speed 5,456,264 years

HD 158038 b Planet Profile

Physical Specs

Radius

13.50 R⊕

Radius (Jupiter)

1.210 R♃

Mass

486.28 M⊕

Mass (Jupiter)

1.530 M♃

Density

1.09 g/cm³

Surface Gravity

2.67 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.345

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#671of 1771

top 37.8%

This planet

13.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 45350 b 13.50 R⊕ HD 82943 b 13.50 R⊕ HD 27442 b 13.50 R⊕

Metric	Earth	HD 158038 b	Jupiter
Radius (R⊕)	1.00	13.50	11.21
Mass (M⊕)	1.00	486.28	317.83
Density (g/cm³)	5.51	1.09	1.33
Surface Gravity (g)	1.00	2.67	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	486.280 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 158038

HIP

HIP 85294

TIC

TIC 313709116

Gaia DR2

Gaia DR2 4574156834713113600

Gaia DR3

Gaia DR3 4574156834713113600

System

HD 158038

Percentile among Gas Giant cohort

Radius 13.500 R⊕ · percentile 59 / cohort 1771

Mass 486.280 M⊕ · percentile 48 / cohort 1747

Orbital period 521.00 d · percentile 68 / cohort 1533

Distance 94.86 pc · percentile 34 / cohort 1759

ESI 0.345 · percentile 69 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

521.000 days

Semi-major axis

1.5000 AU

Eccentricity

0.290

Inclination

— °

Year Length

A year here lasts about 1.43 Earth years on a mildly elliptical path at a mean orbital distance of 1.5000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.345

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2011

Instrument

HIRES Spectrometer

Publication

2011-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2011 at W. M. Keck Observatory (12 shown).

HD 5891 b · Gas Giant HD 102329 b · Gas Giant HD 18742 b · Gas Giant HD 142245 b · Gas Giant CFBDSIR J145829+101343 b · Gas Giant HD 1502 b · Gas Giant HD 108863 b · Gas Giant HD 82886 b · Gas Giant HD 106270 b · Gas Giant HD 98219 b · Gas Giant HD 152581 b · Gas Giant HD 131496 b · Gas Giant

Host System: HD 158038

Spectral Class

K-type orange

Effective Temperature

4,860 K — cooler than the Sun (5,778 K)

Estimated Age

2.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.500 R☉

Stellar Mass

1.300 M☉

Metallicity [Fe/H]

0.19

Extended Stellar Properties

Surface gravity (log g)

3.240 dex

Systemic radial velocity

19.90 km/s

Rotational v·sin i

1.66 km/s

Metallicity ratio

[Fe/H]

Distance

94.86 parsec

Light-years 309.40 ly

V-band magnitude

7.47 mag

Voyager-speed travel 5,456,264 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

10.513 mas

Total Proper Motion

72.546 mas/yr

PM Right Ascension

44.62 mas/yr

PM Declination

-57.20 mas/yr

Galactic Cartesian (pc)

x = -0.132 · y = -0.879 · z = 0.459

Equatorial (J2000)

RA 261.43953° · Dec 27.30307°

Galactic ℓ, b

50.397° · 29.866°

Ecliptic λ, β

258.023° · 50.387°

HTM-20 index

-1706260948

Similar Worlds

Kepler-46 c

Gas Giant · K-type orange

Radius 13.50 R⊕ · 2,534.4 ly

HD 222076 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 297.3 ly

HD 128311 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 53.3 ly

BD+48 740 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 2,174.1 ly

HD 81688 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 279.6 ly

HD 47366 c

Gas Giant · K-type orange

Radius 13.50 R⊕ · 275.1 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries W. M. Keck Observatory Mission K-type orange Hosts