Key parameters at a glance

A radius of 12.70 Earth radii
A mass of 2,129.46 Earth masses
Surface gravity around 13.20 g
An orbital period of 417.900 days
Semi-major axis 1.3000 AU
Distance from Earth 227.88 light-years
Earth Similarity Index 0.438
Travel time at Voyager 1 speed 4,018,657 years

eps CrB b Planet Profile

Physical Specs

Radius

12.70 R⊕

Radius (Jupiter)

1.130 R♃

Mass

2,129.46 M⊕

Mass (Jupiter)

6.700 M♃

Density

5.71 g/cm³

Surface Gravity

13.20 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.438

HZ Position Unknown

Controversial No

Discovery

Year 2012

Method Radial Velocity

Facility Bohyunsan Optical Astronomical Observatory

Telescope 1.8 m Telescope

Size rank in cohort

Rank by radius

#1130of 1771

top 63.7%

This planet

12.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 168863 b 12.70 R⊕ HD 233604 b 12.70 R⊕ Kepler-424 c 12.70 R⊕

Metric	Earth	eps CrB b	Jupiter
Radius (R⊕)	1.00	12.70	11.21
Mass (M⊕)	1.00	2,129.46	317.83
Density (g/cm³)	5.51	5.71	1.33
Surface Gravity (g)	1.00	13.20	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	2,129.461 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 143107

HIP

HIP 78159

TIC

TIC 356000102

Gaia DR2

Gaia DR2 1220404653534258816

Gaia DR3

Gaia DR3 1220404653534258816

System

eps CrB

Percentile among Gas Giant cohort

Radius 12.700 R⊕ · percentile 34 / cohort 1771

Mass 2,129.461 M⊕ · percentile 81 / cohort 1747

Orbital period 417.90 d · percentile 65 / cohort 1533

Distance 69.87 pc · percentile 28 / cohort 1759

ESI 0.438 · percentile 97 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

417.900 days

Semi-major axis

1.3000 AU

Eccentricity

0.110

Inclination

— °

Year Length

A year here lasts about 1.14 Earth years on a mildly elliptical path at a mean orbital distance of 1.3000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.438

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Lee et al. 2012

Instrument

BOES Echelle Spectrograph

Publication

2012-10

Observation locale

Ground

Discovery cohort

Planets confirmed in 2012 at Bohyunsan Optical Astronomical Observatory (3 shown).

HD 66141 b · Gas Giant HD 208527 b · Gas Giant HD 220074 b · Gas Giant

Host System: eps CrB

Spectral Class

K-type orange

Effective Temperature

4,406 K — cooler than the Sun (5,778 K)

Estimated Age

1.74 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

21.000 R☉

Stellar Mass

1.700 M☉

Metallicity [Fe/H]

-0.09

Extended Stellar Properties

Surface gravity (log g)

1.940 dex

Systemic radial velocity

-30.92 km/s

Rotational v·sin i

2.40 km/s

Metallicity ratio

[Fe/H]

Distance

69.87 parsec

Light-years 227.88 ly

V-band magnitude

4.13 mag

Voyager-speed travel 4,018,657 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

14.290 mas

Total Proper Motion

97.280 mas/yr

PM Right Ascension

-76.98 mas/yr

PM Declination

-59.47 mas/yr

Galactic Cartesian (pc)

x = -0.454 · y = -0.768 · z = 0.452

Equatorial (J2000)

RA 239.39651° · Dec 26.87762°

Galactic ℓ, b

43.653° · 48.783°

Ecliptic λ, β

229.114° · 46.068°

HTM-20 index

-42461436

Observation Record

Photometric series

RV measurements

Archive notes

Similar Worlds

HD 168863 b

Gas Giant · K-type orange

Radius 12.70 R⊕ · 130.1 ly

HD 27894 d

Gas Giant · K-type orange

Radius 12.70 R⊕ · 142.9 ly

HIP 56640 b

Gas Giant · K-type orange

Radius 12.70 R⊕ · 399.0 ly

HIP 67851 c

Gas Giant · K-type orange

Radius 12.70 R⊕ · 209.1 ly

HD 113996 b

Gas Giant · K-type orange

Radius 12.70 R⊕ · 379.4 ly

BD+03 2562 b

Gas Giant · K-type orange

Radius 12.70 R⊕ · 3,491.9 ly

Explore Related Categories

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