Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,706.75 Earth masses
Surface gravity around 10.42 g
An orbital period of 163.940 days
Semi-major axis 0.6000 AU
Distance from Earth 205.64 light-years
Earth Similarity Index 0.434
Travel time at Voyager 1 speed 3,626,393 years

Context from the literature

HD 154672 b is an extrasolar planet located approximately 210 light-years away in the constellation of Ara, orbiting the metal-rich and aged star HD 154672. This planet has a minimum mass five times that of Jupiter and orbits at about 60% the distance between the Earth to the Sun. Its orbit is very elliptical, which causes temperatures on the planet to vary significantly as it proceeds along its orbit. This planet was discovered in Las Campanas Observatory on September 5, 2008 using the radial velocity method. Along with HD 205739 b, the planets were the first to be discovered by the N2K Consortium using the Magellan Telescopes.

Excerpted from Wikipedia · full article

HD 154672 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,706.75 M⊕

Mass (Jupiter)

5.370 M♃

Density

4.47 g/cm³

Surface Gravity

10.42 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.434

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility Las Campanas Observatory

Telescope 6.5 m Magellan II Clay Telescope

Size rank in cohort

Rank by radius

#1063of 1771

top 60.0%

This planet

12.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 240210 b 12.80 R⊕ HD 29985 b 12.80 R⊕ HD 148164 c 12.80 R⊕

Metric	Earth	HD 154672 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,706.75	317.83
Density (g/cm³)	5.51	4.47	1.33
Surface Gravity (g)	1.00	10.42	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,706.747 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 154672

HIP

HIP 83983

TIC

TIC 380086262

Gaia DR2

Gaia DR2 5917231492323978880

Gaia DR3

Gaia DR3 5917231492323978880

System

HD 154672

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,706.747 M⊕ · percentile 77 / cohort 1747

Orbital period 163.94 d · percentile 56 / cohort 1533

Distance 63.05 pc · percentile 26 / cohort 1759

ESI 0.434 · percentile 95 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

163.940 days

Semi-major axis

0.6000 AU

Eccentricity

0.610

Inclination

— °

Year Length

A year here lasts approximately 163.94 Earth days (44.9% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.6000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.434

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Lopez Morales et al. 2008

Instrument

MIKE Spectrograph

Publication

2008-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at Las Campanas Observatory (3 shown).

HD 48265 b · Gas Giant HD 143361 b · Gas Giant HD 205739 b · Gas Giant

Host System: HD 154672

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,743 K — cooler than the Sun (5,778 K)

Estimated Age

8.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.320 R☉

Stellar Mass

1.180 M☉

Metallicity [Fe/H]

0.25

Extended Stellar Properties

Surface gravity (log g)

4.270 dex

Stellar density

0.579 g/cm³

Systemic radial velocity

-3.93 km/s

Rotational v·sin i

2.20 km/s

Metallicity ratio

[Fe/H]

Distance

63.05 parsec

Light-years 205.64 ly

V-band magnitude

8.21 mag

Voyager-speed travel 3,626,393 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

15.832 mas

Total Proper Motion

127.639 mas/yr

PM Right Ascension

30.39 mas/yr

PM Declination

-123.97 mas/yr

Galactic Cartesian (pc)

x = -0.119 · y = -0.540 · z = -0.833

Equatorial (J2000)

RA 257.52070° · Dec -56.44980°

Galactic ℓ, b

333.385° · -9.760°

Ecliptic λ, β

261.775° · -33.366°

HTM-20 index

704696966

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