Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 376.94 Earth masses
Surface gravity around 2.01 g
An orbital period of 3,280.000 days
Semi-major axis 4.1580 AU
Distance from Earth 59.63 light-years
Earth Similarity Index 0.322
Travel time at Voyager 1 speed 1,051,652 years

HD 154345 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.220 R♃

Mass

376.94 M⊕

Mass (Jupiter)

1.186 M♃

Density

0.81 g/cm³

Surface Gravity

2.01 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.322

HZ Position Unknown

Controversial No

Discovery

Year 2006

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 154345 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	376.94	317.83
Density (g/cm³)	5.51	0.81	1.33
Surface Gravity (g)	1.00	2.01	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	376.944 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	365.505 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 154345

HIP

HIP 83389

TIC

TIC 198562505

Gaia DR2

Gaia DR2 1359938520253565952

Gaia DR3

Gaia DR3 1359938520253565952

System

HD 154345

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 376.944 M⊕ · percentile 40 / cohort 1747

Orbital period 3,280.00 d · percentile 89 / cohort 1533

Distance 18.28 pc · percentile 3 / cohort 1759

ESI 0.322 · percentile 63 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3,280.000 days

Semi-major axis

4.1580 AU

Eccentricity

0.058

Inclination

88.00 °

Year Length

A year here lasts about 8.98 Earth years on a nearly circular orbit at a mean orbital distance of 4.1580 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

17.050 m/s

Transit mid-time (BJD)

2,456,384.0000

Long. of periastron (ω)

309.00°

Angular separation (arcsec)

227.00000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.322

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Wright et al. 2007

Instrument

HIRES Spectrometer

Publication

2007-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2006 at W. M. Keck Observatory (7 shown).

HD 24040 b · Gas Giant HD 86081 b · Gas Giant HIP 14810 c · Gas Giant HD 10647 b · Gas Giant GJ 849 b · Gas Giant HD 224693 b · Gas Giant HD 33283 b · Gas Giant

Host System: HD 154345

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,468 K — cooler than the Sun (5,778 K)

Estimated Age

9.53 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.890 M☉

Metallicity [Fe/H]

-0.11

Extended Stellar Properties

Surface gravity (log g)

4.505 dex

Stellar density

2.036 g/cm³

Systemic radial velocity

-47.30 km/s

Rotational v·sin i

1.20 km/s

Activity index (log R'HK)

-4.910

Metallicity ratio

[Fe/H]

Distance

18.28 parsec

Light-years 59.63 ly

V-band magnitude

6.76 mag

Voyager-speed travel 1,051,652 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

54.664 mas

Total Proper Motion

862.586 mas/yr

PM Right Ascension

123.20 mas/yr

PM Declination

853.74 mas/yr

Galactic Cartesian (pc)

x = -0.169 · y = -0.660 · z = 0.732

Equatorial (J2000)

RA 255.65246° · Dec 47.08555°

Galactic ℓ, b

73.027° · 37.663°

Ecliptic λ, β

241.738° · 69.122°

HTM-20 index

-847930209

Observation Record

Photometric series

RV measurements

Stellar spectra