Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 597.84 Earth masses
Surface gravity around 3.33 g
An orbital period of 919.860 days
Semi-major axis 2.0280 AU
Distance from Earth 178.28 light-years
Earth Similarity Index 0.362
Travel time at Voyager 1 speed 3,143,907 years

6 Lyn b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.200 R♃

Mass

597.84 M⊕

Mass (Jupiter)

1.881 M♃

Density

1.37 g/cm³

Surface Gravity

3.33 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.362

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 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	6 Lyn b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	597.84	317.83
Density (g/cm³)	5.51	1.37	1.33
Surface Gravity (g)	1.00	3.33	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	597.835 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 45410

HIP

HIP 31039

TIC

TIC 444865362

Gaia DR2

Gaia DR2 1004358968092652544

Gaia DR3

Gaia DR3 1004358968092652544

System

6 Lyn

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 597.835 M⊕ · percentile 53 / cohort 1747

Orbital period 919.86 d · percentile 76 / cohort 1533

Distance 54.66 pc · percentile 22 / cohort 1759

ESI 0.362 · percentile 74 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

919.860 days

Semi-major axis

2.0280 AU

Eccentricity

0.042

Inclination

— °

Year Length

A year here lasts about 2.52 Earth years on a nearly circular orbit at a mean orbital distance of 2.0280 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.362

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Sato et al. 2008

Instrument

HIDES Echelle Spectrograph

Publication

2008-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at Okayama Astrophysical Observatory (3 shown).

14 And b · Gas Giant 81 Cet b · Gas Giant 18 Del b · Gas Giant

Host System: 6 Lyn

Spectral Class

K-type orange

Effective Temperature

4,941 K — cooler than the Sun (5,778 K)

Estimated Age

2.35 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.940 R☉

Stellar Mass

1.320 M☉

Metallicity [Fe/H]

-0.17

Extended Stellar Properties

Surface gravity (log g)

3.160 dex

Systemic radial velocity

39.70 km/s

Rotational v·sin i

1.32 km/s

Metallicity ratio

[Fe/H]

Distance

54.66 parsec

Light-years 178.28 ly

V-band magnitude

5.87 mag

Voyager-speed travel 3,143,907 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.267 mas

Total Proper Motion

340.042 mas/yr

PM Right Ascension

-30.42 mas/yr

PM Declination

-338.68 mas/yr

Galactic Cartesian (pc)

x = -0.071 · y = 0.523 · z = 0.850

Equatorial (J2000)

RA 97.69603° · Dec 58.16118°

Galactic ℓ, b

156.973° · 20.189°

Ecliptic λ, β

94.935° · 34.854°

HTM-20 index

-1771485228

Observation Record

Photometric series

RV measurements

Archive notes

Similar Worlds

HD 93083 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 93.0 ly

Kepler-48 e

Gas Giant · K-type orange

Radius 13.40 R⊕ · 1,000.4 ly

HD 47366 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 275.1 ly

HIP 114933 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 331.9 ly

HD 114783 c

Gas Giant · K-type orange

Radius 13.40 R⊕ · 68.7 ly

HD 4732 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 178.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Okayama Astrophysical Observatory Mission K-type orange Hosts