Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 4,327.36 Earth masses
Surface gravity around 28.60 g
Semi-major axis 55.0000 AU
Equilibrium temperature 1,900 K (1627 °C)
Distance from Earth 163.14 light-years
Earth Similarity Index 0.069
Travel time at Voyager 1 speed 2,876,898 years

kap And b Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.100 R♃

Mass

4,327.36 M⊕

Mass (Jupiter)

13.616 M♃

Density

12.80 g/cm³

Surface Gravity

28.60 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.069

HZ Position Unknown

Controversial No

Discovery

Year 2012

Method Imaging

Facility Subaru Telescope

Telescope 8.2 m Subaru Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕

Metric	Earth	kap And b	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	4,327.36	317.83
Density (g/cm³)	5.51	12.80	1.33
Surface Gravity (g)	1.00	28.60	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4,327.360 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 222439

HIP

HIP 116805

TIC

TIC 176945734

Gaia DR2

Gaia DR2 1926476042677456768

Gaia DR3

Gaia DR3 1926476042681491712

System

kap And

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 4,327.360 M⊕ · percentile 92 / cohort 1747

Distance 50.02 pc · percentile 19 / cohort 1759

ESI 0.069 · percentile 13 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

55.0000 AU

Eccentricity

—

Inclination

— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

1,900K

(1627 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.069

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Carson et al. 2013

Instrument

HiCIAO Camera

Publication

2013-02

Observation locale

Ground

Host System: kap And

Spectral Class

B-type blue-white

Effective Temperature

10,900 K — hotter than the Sun (5,778 K)

Estimated Age

0.03 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.312 R☉

Stellar Mass

2.600 M☉

Metallicity [Fe/H]

-0.36

Extended Stellar Properties

Surface gravity (log g)

3.780 dex

Stellar density

0.322 g/cm³

Metallicity ratio

[M/H]

Distance

50.02 parsec

Light-years 163.14 ly

V-band magnitude

4.14 mag

Voyager-speed travel 2,876,898 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

19.975 mas

Total Proper Motion

83.393 mas/yr

PM Right Ascension

80.93 mas/yr

PM Declination

-20.11 mas/yr

Galactic Cartesian (pc)

x = 0.713 · y = -0.061 · z = 0.699

Equatorial (J2000)

RA 355.10260° · Dec 44.33385°

Galactic ℓ, b

109.766° · -16.715°

Ecliptic λ, β

17.295° · 41.718°

HTM-20 index

-707925180

Similar Worlds

mu2 Sco b

Gas Giant · B-type blue-white

Radius 12.30 R⊕ · —

b Cen AB b

Gas Giant · B-type blue-white

Radius 12.40 R⊕ · 319.9 ly

HIP 77900 b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 492.0 ly

HIP 79098 AB b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 475.5 ly

HIP 78530 b

Gas Giant · B-type blue-white

Radius 12.00 R⊕ · 446.0 ly

DP Leo b

Gas Giant · B-type blue-white

Radius 12.70 R⊕ · 997.0 ly

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