Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 4,449.62 Earth masses
Surface gravity around 29.41 g
An orbital period of 820.200 days
Semi-major axis 2.1000 AU
Distance from Earth 925.17 light-years
Earth Similarity Index 0.338
Travel time at Voyager 1 speed 16,315,387 years

HD 158996 b Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.100 R♃

Mass

4,449.62 M⊕

Mass (Jupiter)

14.000 M♃

Density

13.10 g/cm³

Surface Gravity

29.41 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.338

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Radial Velocity

Facility Bohyunsan Optical Astronomical Observatory

Telescope 1.8 m Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕

Metric	Earth	HD 158996 b	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	4,449.62	317.83
Density (g/cm³)	5.51	13.10	1.33
Surface Gravity (g)	1.00	29.41	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	4,449.620 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 158996

HIP

HIP 84769

TIC

TIC 288268410

Gaia DR2

Gaia DR2 1709691004385812864

Gaia DR3

Gaia DR3 1709691004385812864

System

HD 158996

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 4,449.620 M⊕ · percentile 93 / cohort 1747

Orbital period 820.20 d · percentile 74 / cohort 1533

Distance 283.66 pc · percentile 59 / cohort 1759

ESI 0.338 · percentile 67 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

820.200 days

Semi-major axis

2.1000 AU

Eccentricity

0.130

Inclination

— °

Year Length

A year here lasts about 2.25 Earth years on a mildly elliptical path at a mean orbital distance of 2.1000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.338

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Bang et al. 2018

Instrument

BOES Echelle Spectrograph

Publication

2018-02

Observation locale

Ground

Host System: HD 158996

Spectral Class

K-type orange

Effective Temperature

4,069 K — cooler than the Sun (5,778 K)

Estimated Age

1.60 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

50.300 R☉

Stellar Mass

1.800 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

1.400 dex

Systemic radial velocity

-8.70 km/s

Rotational v·sin i

4.20 km/s

Rotation period

627.00 days

Metallicity ratio

[Fe/H]

Distance

283.66 parsec

Light-years 925.17 ly

V-band magnitude

5.72 mag

Voyager-speed travel 16,315,387 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.498 mas

Total Proper Motion

18.666 mas/yr

PM Right Ascension

18.65 mas/yr

PM Declination

0.79 mas/yr

Galactic Cartesian (pc)

x = -0.030 · y = -0.169 · z = 0.985

Equatorial (J2000)

RA 259.90511° · Dec 80.13640°

Galactic ℓ, b

112.375° · 30.577°

Ecliptic λ, β

97.212° · 76.169°

HTM-20 index

416111188

Similar Worlds

SR 12 AB c

Gas Giant · K-type orange

Radius 12.30 R⊕ · 366.3 ly

2MASS J22362452+4751425 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 226.9 ly

11 UMi b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 408.7 ly

HD 22781 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 106.3 ly

HD 4760 b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 1,754.3 ly

AB Pic b

Gas Giant · K-type orange

Radius 12.30 R⊕ · 163.2 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Bohyunsan Optical Astronomical Observatory Mission K-type orange Hosts