Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 591.16 Earth masses
Surface gravity around 3.29 g
An orbital period of 1,253.680 days
Semi-major axis 2.5000 AU
Distance from Earth 98.06 light-years
Earth Similarity Index 0.360
Travel time at Voyager 1 speed 1,729,273 years

kap CrB b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.200 R♃

Mass

591.16 M⊕

Mass (Jupiter)

1.860 M♃

Density

1.35 g/cm³

Surface Gravity

3.29 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.360

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Radial Velocity

Facility Lick Observatory

Telescope 3.0 m C. Donald Shane 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	kap CrB b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	591.16	317.83
Density (g/cm³)	5.51	1.35	1.33
Surface Gravity (g)	1.00	3.29	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	591.164 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	483.735 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 142091

HIP

HIP 77655

TIC

TIC 334753043

Gaia DR2

Gaia DR2 1372702716380418688

Gaia DR3

Gaia DR3 1372702716380418688

System

kap CrB

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 591.164 M⊕ · percentile 53 / cohort 1747

Orbital period 1,253.68 d · percentile 80 / cohort 1533

Distance 30.07 pc · percentile 8 / cohort 1759

ESI 0.360 · percentile 73 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,253.680 days

Semi-major axis

2.5000 AU

Eccentricity

0.040

Inclination

60.00 °

Year Length

A year here lasts about 3.43 Earth years on a nearly circular orbit at a mean orbital distance of 2.5000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.360

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2008

Instrument

Hamilton Echelle Spectrograph

Publication

2008-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2007 at Lick Observatory (3 shown).

HD 192699 b · Gas Giant HD 210702 b · Gas Giant HD 167042 b · Gas Giant

Host System: kap CrB

Spectral Class

K-type orange

Effective Temperature

4,840 K — cooler than the Sun (5,778 K)

Estimated Age

3.42 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.680 R☉

Stellar Mass

1.330 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

3.200 dex

Systemic radial velocity

-24.98 km/s

Rotational v·sin i

1.50 km/s

Metallicity ratio

[Fe/H]

Distance

30.07 parsec

Light-years 98.06 ly

V-band magnitude

4.80 mag

Voyager-speed travel 1,729,273 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

33.233 mas

Total Proper Motion

347.877 mas/yr

PM Right Ascension

-8.79 mas/yr

PM Declination

-347.77 mas/yr

Galactic Cartesian (pc)

x = -0.433 · y = -0.688 · z = 0.583

Equatorial (J2000)

RA 237.80800° · Dec 35.65588°

Galactic ℓ, b

57.015° · 51.041°

Ecliptic λ, β

222.664° · 53.934°

HTM-20 index

-749474428

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 Lick Observatory Mission K-type orange Hosts