Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 918.53 Earth masses
Surface gravity around 5.27 g
An orbital period of 434.500 days
Semi-major axis 1.1300 AU
Distance from Earth 206.64 light-years
Earth Similarity Index 0.393
Travel time at Voyager 1 speed 3,644,166 years

HD 165155 b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

918.53 M⊕

Mass (Jupiter)

2.890 M♃

Density

2.19 g/cm³

Surface Gravity

5.27 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.393

HZ Position Unknown

Controversial No

Discovery

Year 2016

Method Radial Velocity

Facility Multiple Observatories

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 165155 b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	918.53	317.83
Density (g/cm³)	5.51	2.19	1.33
Surface Gravity (g)	1.00	5.27	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	918.529 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 165155

HIP

HIP 88650

TIC

TIC 408229533

Gaia DR2

Gaia DR2 4050284898932499072

Gaia DR3

Gaia DR3 4050284898932499072

System

HD 165155

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 918.529 M⊕ · percentile 65 / cohort 1747

Orbital period 434.50 d · percentile 65 / cohort 1533

Distance 63.36 pc · percentile 26 / cohort 1759

ESI 0.393 · percentile 84 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

434.500 days

Semi-major axis

1.1300 AU

Eccentricity

0.200

Inclination

— °

Year Length

A year here lasts about 1.19 Earth years on a mildly elliptical path at a mean orbital distance of 1.1300 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.393

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Jenkins et al. 2017

Instrument

Multiple Instruments

Publication

2017-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2016 at Multiple Observatories (12 shown).

HD 42618 b · Sub-Neptune HD 164922 c · Sub-Neptune HD 224538 b · Gas Giant HD 30177 c · Gas Giant Kepler-56 d · Gas Giant HD 72892 b · Gas Giant HD 147873 b · Gas Giant HIP 8541 b · Gas Giant HD 68402 b · Gas Giant HD 86950 b · Gas Giant rho CrB c · Neptune-like HIP 74890 b · Gas Giant

Host System: HD 165155

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,426 K — cooler than the Sun (5,778 K)

Estimated Age

11.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.950 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.757 g/cm³

Systemic radial velocity

14.60 km/s

Rotational v·sin i

1.50 km/s

Metallicity ratio

[Fe/H]

Distance

63.36 parsec

Light-years 206.64 ly

V-band magnitude

9.36 mag

Voyager-speed travel 3,644,166 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

15.755 mas

Total Proper Motion

76.954 mas/yr

PM Right Ascension

76.94 mas/yr

PM Declination

-1.48 mas/yr

Galactic Cartesian (pc)

x = 0.023 · y = -0.866 · z = -0.499

Equatorial (J2000)

RA 271.48934° · Dec -29.91725°

Galactic ℓ, b

1.379° · -4.321°

Ecliptic λ, β

271.295° · -6.485°

HTM-20 index

-1802397412