Key parameters at a glance

A radius of 13.80 Earth radii
A mass of 334.67 Earth masses
Surface gravity around 1.76 g
An orbital period of 872.200 days
Semi-major axis 1.9300 AU
Distance from Earth 395.97 light-years
Earth Similarity Index 0.312
Travel time at Voyager 1 speed 6,982,925 years

1 sibling around HD 5319

HD 5319 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 5319 b	Gas Giant	13.50	494.54	637.100	—	2007
HD 5319 c this	Gas Giant	13.80	334.67	872.200	—	2014

HD 5319 c Planet Profile

Physical Specs

Radius

13.80 R⊕

Radius (Jupiter)

1.230 R♃

Mass

334.67 M⊕

Mass (Jupiter)

1.053 M♃

Density

0.70 g/cm³

Surface Gravity

1.76 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.312

HZ Position Unknown

Controversial No

Discovery

Year 2014

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#510of 1771

top 28.7%

This planet

13.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 179 b 13.80 R⊕ GJ 832 b 13.80 R⊕ HD 219415 b 13.80 R⊕

Metric	Earth	HD 5319 c	Jupiter
Radius (R⊕)	1.00	13.80	11.21
Mass (M⊕)	1.00	334.67	317.83
Density (g/cm³)	5.51	0.70	1.33
Surface Gravity (g)	1.00	1.76	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	334.675 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 5319

HIP

HIP 4297

TIC

TIC 344627954

Gaia DR2

Gaia DR2 2537319343919089024

Gaia DR3

Gaia DR3 2537319343919089024

System

HD 5319

Percentile among Gas Giant cohort

Radius 13.800 R⊕ · percentile 70 / cohort 1771

Mass 334.675 M⊕ · percentile 36 / cohort 1747

Orbital period 872.20 d · percentile 75 / cohort 1533

Distance 121.41 pc · percentile 39 / cohort 1759

ESI 0.312 · percentile 61 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

872.200 days

Semi-major axis

1.9300 AU

Eccentricity

0.183

Inclination

— °

Year Length

A year here lasts about 2.39 Earth years on a mildly elliptical path at a mean orbital distance of 1.9300 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.312

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Giguere et al. 2015

Instrument

HIRES Spectrometer

Publication

2015-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at W. M. Keck Observatory (11 shown).

HAT-P-44 c · Gas Giant Kepler-94 c · Gas Giant HD 4203 c · Gas Giant Kepler-48 e · Gas Giant Kepler-407 c · Gas Giant HD 10442 b · Gas Giant GJ 849 c · Gas Giant HD 75784 b · Gas Giant Kepler-25 d · Gas Giant Kepler-93 c · Unclassified Kepler-97 c · Unclassified

Host System: HD 5319

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,871 K — cooler than the Sun (5,778 K)

Estimated Age

3.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.060 R☉

Stellar Mass

1.270 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

3.260 dex

Systemic radial velocity

0.45 km/s

Rotational v·sin i

3.31 km/s

Metallicity ratio

[Fe/H]

Distance

121.41 parsec

Light-years 395.97 ly

V-band magnitude

8.05 mag

Voyager-speed travel 6,982,925 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

8.208 mas

Total Proper Motion

49.857 mas/yr

PM Right Ascension

-5.40 mas/yr

PM Declination

-49.56 mas/yr

Galactic Cartesian (pc)

x = 0.971 · y = 0.238 · z = 0.014

Equatorial (J2000)

RA 13.75581° · Dec 0.78934°

Galactic ℓ, b

124.846° · -62.069°

Ecliptic λ, β

12.962° · -4.700°

HTM-20 index

-293031071

Observation Record

Photometric series

RV measurements

Stellar spectra