Key parameters at a glance

A radius of 14.20 Earth radii
A mass of 155.74 Earth masses
Surface gravity around 0.77 g
An orbital period of 21.998 days
Semi-major axis 0.1400 AU
Distance from Earth 138.15 light-years
Earth Similarity Index 0.253
Travel time at Voyager 1 speed 2,436,331 years

HD 6434 b Planet Profile

Physical Specs

Radius

14.20 R⊕

Radius (Jupiter)

1.270 R♃

Mass

155.74 M⊕

Mass (Jupiter)

0.490 M♃

Density

0.30 g/cm³

Surface Gravity

0.77 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.253

HZ Position Unknown

Controversial No

Discovery

Year 2003

Method Radial Velocity

Facility La Silla Observatory

Telescope 1.2 m Leonhard Euler Telescope

Size rank in cohort

Rank by radius

#334of 1771

top 18.8%

This planet

14.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

OGLE-2011-BLG-0251L b 14.20 R⊕ HIP 57274 c 14.20 R⊕ HD 187123 b 14.20 R⊕

Metric	Earth	HD 6434 b	Jupiter
Radius (R⊕)	1.00	14.20	11.21
Mass (M⊕)	1.00	155.74	317.83
Density (g/cm³)	5.51	0.30	1.33
Surface Gravity (g)	1.00	0.77	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	155.737 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 6434

HIP

HIP 5054

TIC

TIC 180871947

Gaia DR2

Gaia DR2 4988158666635743616

Gaia DR3

Gaia DR3 4988158666636598272

System

HD 6434

Percentile among Gas Giant cohort

Radius 14.200 R⊕ · percentile 79 / cohort 1771

Mass 155.737 M⊕ · percentile 13 / cohort 1747

Orbital period 22.00 d · percentile 48 / cohort 1533

Distance 42.36 pc · percentile 15 / cohort 1759

ESI 0.253 · percentile 45 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

21.998 days

Semi-major axis

0.1400 AU

Eccentricity

0.170

Inclination

— °

Year Length

A year here lasts approximately 22.00 Earth days (6.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1400 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.253

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mayor et al. 2004

Instrument

CORALIE Spectrograph

Publication

2004-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2003 at La Silla Observatory (11 shown).

HD 169830 c · Gas Giant HD 111232 b · Gas Giant HD 82943 c · Gas Giant HD 142415 b · Gas Giant HD 82943 b · Gas Giant HD 121504 b · Gas Giant HD 114386 b · Gas Giant HD 19994 b · Gas Giant HD 65216 b · Gas Giant HD 41004 B b · Gas Giant HD 216770 b · Gas Giant

Host System: HD 6434

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,769 K — cooler than the Sun (5,778 K)

Estimated Age

11.27 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.120 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

-0.55

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

1.037 g/cm³

Systemic radial velocity

22.92 km/s

Rotational v·sin i

2.20 km/s

Metallicity ratio

[Fe/H]

Distance

42.36 parsec

Light-years 138.15 ly

V-band magnitude

7.72 mag

Voyager-speed travel 2,436,331 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

23.579 mas

Total Proper Motion

554.589 mas/yr

PM Right Ascension

-170.12 mas/yr

PM Declination

-527.85 mas/yr

Galactic Cartesian (pc)

x = 0.741 · y = 0.215 · z = -0.636

Equatorial (J2000)

RA 16.16634° · Dec -39.49049°

Galactic ℓ, b

291.217° · -77.335°

Ecliptic λ, β

355.689° · -41.986°

HTM-20 index

-533049890

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes