Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 905.81 Earth masses
Surface gravity around 5.20 g
An orbital period of 1,820.000 days
Semi-major axis 2.8770 AU
Distance from Earth 177.19 light-years
Earth Similarity Index 0.392
Travel time at Voyager 1 speed 3,124,690 years

HD 167677 b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

905.81 M⊕

Mass (Jupiter)

2.850 M♃

Density

2.16 g/cm³

Surface Gravity

5.20 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.392

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility Multiple Facilities

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ MOA-2009-BLG-387L b 13.20 R⊕

Metric	Earth	HD 167677 b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	905.81	317.83
Density (g/cm³)	5.51	2.16	1.33
Surface Gravity (g)	1.00	5.20	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	905.811 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	435.107 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 167677

HIP

HIP 89583

TIC

TIC 13894108

Gaia DR2

Gaia DR2 4153949058525858048

Gaia DR3

Gaia DR3 4153949058525858048

System

HD 167677

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 905.811 M⊕ · percentile 64 / cohort 1747

Orbital period 1,820.00 d · percentile 84 / cohort 1533

Distance 54.33 pc · percentile 22 / cohort 1759

ESI 0.392 · percentile 84 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,820.000 days

Semi-major axis

2.8770 AU

Eccentricity

0.182

Inclination

28.70 °

Year Length

A year here lasts about 4.98 Earth years on a mildly elliptical path at a mean orbital distance of 2.8770 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.392

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

Xiao et al. 2023

Instrument

Multiple Instruments

Publication

2023-05

Observation locale

Multiple Locales

Discovery cohort

Planets confirmed in 2023 at Multiple Facilities (3 shown).

GJ 1151 c · Sub-Neptune HD 89839 b · Gas Giant HD 165131 b · Gas Giant

Host System: HD 167677

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,474 K — cooler than the Sun (5,778 K)

Estimated Age

11.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.953 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.29

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

1.565 g/cm³

Rotational v·sin i

0.70 km/s

Activity index (log R'HK)

-4.980

Metallicity ratio

[Fe/H]

Distance

54.33 parsec

Light-years 177.19 ly

V-band magnitude

8.90 mag

Voyager-speed travel 3,124,690 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.379 mas

Total Proper Motion

226.463 mas/yr

PM Right Ascension

74.32 mas/yr

PM Declination

-213.92 mas/yr

Galactic Cartesian (pc)

x = 0.072 · y = -0.978 · z = -0.198

Equatorial (J2000)

RA 274.20678° · Dec -11.40679°

Galactic ℓ, b

18.841° · 2.354°

Ecliptic λ, β

274.212° · 11.971°

HTM-20 index

-1743667768