Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 603.90 Earth masses
Surface gravity around 3.36 g
An orbital period of 248.400 days
Semi-major axis 0.8000 AU
Distance from Earth 239.09 light-years
Earth Similarity Index 0.362
Travel time at Voyager 1 speed 4,216,357 years

1 sibling around HD 159243

HD 159243 c 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 159243 b	Gas Giant	13.70	359.13	12.620	—	2013
HD 159243 c this	Gas Giant	13.40	603.90	248.400	—	2013

HD 159243 c Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.200 R♃

Mass

603.90 M⊕

Mass (Jupiter)

1.900 M♃

Density

1.38 g/cm³

Surface Gravity

3.36 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.362

HZ Position Unknown

Controversial No

Discovery

Year 2013

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 159243 c	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	603.90	317.83
Density (g/cm³)	5.51	1.38	1.33
Surface Gravity (g)	1.00	3.36	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	603.900 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 159243

HIP

HIP 85911

TIC

TIC 348652846

Gaia DR2

Gaia DR2 4485937214320449280

Gaia DR3

Gaia DR3 4485937214320449280

System

HD 159243

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 603.900 M⊕ · percentile 54 / cohort 1747

Orbital period 248.40 d · percentile 59 / cohort 1533

Distance 73.31 pc · percentile 29 / cohort 1759

ESI 0.362 · percentile 74 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

248.400 days

Semi-major axis

0.8000 AU

Eccentricity

0.075

Inclination

— °

Year Length

A year here lasts approximately 248.40 Earth days (68.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.8000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.362

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Moutou et al. 2014

Instrument

SOPHIE Spectrograph

Publication

2014-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2013 at Haute-Provence Observatory (5 shown).

HD 13908 c · Gas Giant HD 113337 b · Gas Giant HD 159243 b · Gas Giant HIP 91258 b · Gas Giant HD 13908 b · Gas Giant

Host System: HD 159243

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

6,123 K — hotter than the Sun (5,778 K)

Estimated Age

1.25 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.120 R☉

Stellar Mass

1.125 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.550 dex

Stellar density

1.174 g/cm³

Systemic radial velocity

-22.69 km/s

Rotational v·sin i

3.80 km/s

Metallicity ratio

[Fe/H]

Distance

73.31 parsec

Light-years 239.09 ly

V-band magnitude

8.65 mag

Voyager-speed travel 4,216,357 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

13.613 mas

Total Proper Motion

59.103 mas/yr

PM Right Ascension

-54.95 mas/yr

PM Declination

21.77 mas/yr

Galactic Cartesian (pc)

x = -0.115 · y = -0.988 · z = 0.099

Equatorial (J2000)

RA 263.33954° · Dec 5.70083°

Galactic ℓ, b

29.077° · 19.950°

Ecliptic λ, β

262.416° · 28.965°

HTM-20 index

163312267