Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 353.43 Earth masses
Surface gravity around 1.88 g
An orbital period of 1,750.000 days
Semi-major axis 2.9900 AU
Distance from Earth 271.79 light-years
Earth Similarity Index 0.318
Travel time at Voyager 1 speed 4,793,063 years

HD 73534 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.230 R♃

Mass

353.43 M⊕

Mass (Jupiter)

1.112 M♃

Density

0.76 g/cm³

Surface Gravity

1.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.318

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#554of 1771

top 31.2%

This planet

13.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 148164 b 13.70 R⊕ HD 114783 b 13.70 R⊕ HD 159243 b 13.70 R⊕

Metric	Earth	HD 73534 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	353.43	317.83
Density (g/cm³)	5.51	0.76	1.33
Surface Gravity (g)	1.00	1.88	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	353.427 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 73534

HIP

HIP 42446

TIC

TIC 21285884

Gaia DR2

Gaia DR2 603083781399095936

Gaia DR3

Gaia DR3 603083781399095936

System

HD 73534

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 353.427 M⊕ · percentile 38 / cohort 1747

Orbital period 1,750.00 d · percentile 83 / cohort 1533

Distance 83.33 pc · percentile 31 / cohort 1759

ESI 0.318 · percentile 62 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,750.000 days

Semi-major axis

2.9900 AU

Eccentricity

0.126

Inclination

— °

Year Length

A year here lasts about 4.79 Earth years on a mildly elliptical path at a mean orbital distance of 2.9900 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.318

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Valenti et al. 2009

Instrument

HIRES Spectrometer

Publication

2009-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at W. M. Keck Observatory (7 shown).

HD 11964 c · Neptune-like HD 183263 c · Gas Giant HD 187123 c · Gas Giant HD 11506 c · Gas Giant HR 8799 d · Gas Giant HD 179079 b · Unclassified HD 7924 b · Unclassified

Host System: HD 73534

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,917 K — cooler than the Sun (5,778 K)

Estimated Age

7.04 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

2.580 R☉

Stellar Mass

1.160 M☉

Metallicity [Fe/H]

0.23

Extended Stellar Properties

Surface gravity (log g)

3.600 dex

Systemic radial velocity

10.08 km/s

Rotational v·sin i

1.00 km/s

Metallicity ratio

[Fe/H]

Distance

83.33 parsec

Light-years 271.79 ly

V-band magnitude

8.23 mag

Voyager-speed travel 4,793,063 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

11.972 mas

Total Proper Motion

147.738 mas/yr

PM Right Ascension

-114.06 mas/yr

PM Declination

-93.90 mas/yr

Galactic Cartesian (pc)

x = -0.624 · y = 0.749 · z = 0.224

Equatorial (J2000)

RA 129.81534° · Dec 12.95997°

Galactic ℓ, b

213.053° · 29.698°

Ecliptic λ, β

128.800° · -5.278°

HTM-20 index

517325557

Observation Record

Photometric series

RV measurements

Stellar spectra