Key parameters at a glance

A radius of 14.10 Earth radii
A mass of 203.41 Earth masses
Surface gravity around 1.02 g
An orbital period of 273.100 days
Semi-major axis 0.9000 AU
Distance from Earth 337.03 light-years
Earth Similarity Index 0.272
Travel time at Voyager 1 speed 5,943,582 years

HD 79181 b Planet Profile

Physical Specs

Radius

14.10 R⊕

Radius (Jupiter)

1.260 R♃

Mass

203.41 M⊕

Mass (Jupiter)

0.640 M♃

Density

0.40 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.272

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 m Telescope

Size rank in cohort

Rank by radius

#371of 1771

top 20.9%

This planet

14.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 27894 b 14.10 R⊕ HD 103720 b 14.10 R⊕ HD 216770 b 14.10 R⊕

Metric	Earth	HD 79181 b	Jupiter
Radius (R⊕)	1.00	14.10	11.21
Mass (M⊕)	1.00	203.41	317.83
Density (g/cm³)	5.51	0.40	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	203.410 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 79181

TIC

TIC 229846907

Gaia DR2

Gaia DR2 5679582499313038080

Gaia DR3

Gaia DR3 5679582499313038080

System

HD 79181

Percentile among Gas Giant cohort

Radius 14.100 R⊕ · percentile 77 / cohort 1771

Mass 203.410 M⊕ · percentile 20 / cohort 1747

Orbital period 273.10 d · percentile 60 / cohort 1533

Distance 103.34 pc · percentile 35 / cohort 1759

ESI 0.272 · percentile 50 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

273.100 days

Semi-major axis

0.9000 AU

Eccentricity

0.259

Inclination

— °

Year Length

A year here lasts approximately 273.10 Earth days (74.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.9000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.272

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Teng et al. 2021

Instrument

HIDES Echelle Spectrograph

Publication

2021-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Okayama Astrophysical Observatory (7 shown).

gam Psc b · Gas Giant HD 99283 b · Gas Giant HD 219139 b · Gas Giant HD 360 b · Gas Giant HD 161178 b · Gas Giant ups Leo b · Gas Giant HD 10975 b · Gas Giant

Host System: HD 79181

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,862 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

11.060 R☉

Stellar Mass

1.280 M☉

Metallicity [Fe/H]

-0.28

Extended Stellar Properties

Surface gravity (log g)

2.450 dex

Rotational v·sin i

1.84 km/s

Metallicity ratio

[Fe/H]

Distance

103.34 parsec

Light-years 337.03 ly

V-band magnitude

5.72 mag

Voyager-speed travel 5,943,582 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.650 mas

Total Proper Motion

72.680 mas/yr

PM Right Ascension

-56.68 mas/yr

PM Declination

45.49 mas/yr

Galactic Cartesian (pc)

x = -0.699 · y = 0.630 · z = -0.338

Equatorial (J2000)

RA 137.99447° · Dec -19.74743°

Galactic ℓ, b

248.366° · 19.148°

Ecliptic λ, β

147.617° · -34.093°

HTM-20 index

1243469681