Key parameters at a glance

A radius of 13.60 Earth radii
A mass of 472.61 Earth masses
Surface gravity around 2.56 g
An orbital period of 1,032.300 days
Semi-major axis 2.0100 AU
Distance from Earth 441.53 light-years
Earth Similarity Index 0.340
Travel time at Voyager 1 speed 7,786,389 years

HD 10442 b Planet Profile

Physical Specs

Radius

13.60 R⊕

Radius (Jupiter)

1.210 R♃

Mass

472.61 M⊕

Mass (Jupiter)

1.487 M♃

Density

1.03 g/cm³

Surface Gravity

2.56 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.340

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

#609of 1771

top 34.3%

This planet

13.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 19994 b 13.60 R⊕ HD 205739 b 13.60 R⊕ HD 79498 b 13.60 R⊕

Metric	Earth	HD 10442 b	Jupiter
Radius (R⊕)	1.00	13.60	11.21
Mass (M⊕)	1.00	472.61	317.83
Density (g/cm³)	5.51	1.03	1.33
Surface Gravity (g)	1.00	2.56	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	472.613 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 10442

TIC

TIC 380908091

Gaia DR2

Gaia DR2 2560311854337920000

Gaia DR3

Gaia DR3 2560311854337920000

System

HD 10442

Percentile among Gas Giant cohort

Radius 13.600 R⊕ · percentile 63 / cohort 1771

Mass 472.613 M⊕ · percentile 47 / cohort 1747

Orbital period 1,032.30 d · percentile 78 / cohort 1533

Distance 135.37 pc · percentile 41 / cohort 1759

ESI 0.340 · percentile 68 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,032.300 days

Semi-major axis

2.0100 AU

Eccentricity

0.132

Inclination

— °

Year Length

A year here lasts about 2.83 Earth years on a mildly elliptical path at a mean orbital distance of 2.0100 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.340

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 5319 c · 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 10442

Spectral Class

K-type orange

Effective Temperature

4,912 K — cooler than the Sun (5,778 K)

Estimated Age

10.65 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.970 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

3.190 dex

Systemic radial velocity

7.94 km/s

Metallicity ratio

[Fe/H]

Distance

135.37 parsec

Light-years 441.53 ly

V-band magnitude

7.83 mag

Voyager-speed travel 7,786,389 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

7.359 mas

Total Proper Motion

23.877 mas/yr

PM Right Ascension

22.15 mas/yr

PM Declination

8.91 mas/yr

Galactic Cartesian (pc)

x = 0.902 · y = 0.430 · z = 0.047

Equatorial (J2000)

RA 25.47152° · Dec 2.70442°

Galactic ℓ, b

147.080° · -57.783°

Ecliptic λ, β

24.598° · -7.330°

HTM-20 index

-1020095422

Similar Worlds

HS Psc b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 122.8 ly

HD 185283 b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 102.4 ly

HD 331093 b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 163.7 ly

HD 167042 b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 162.0 ly

HD 83443 c

Gas Giant · K-type orange

Radius 13.60 R⊕ · 133.4 ly

HD 141399 c

Gas Giant · K-type orange

Radius 13.60 R⊕ · 120.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries W. M. Keck Observatory Mission K-type orange Hosts