Key parameters at a glance

A radius of 14.20 Earth radii
A mass of 168.45 Earth masses
Surface gravity around 0.84 g
An orbital period of 358.000 days
Semi-major axis 0.9400 AU
Distance from Earth 106.12 light-years
Earth Similarity Index 0.258
Travel time at Voyager 1 speed 1,871,485 years

HD 63765 b Planet Profile

Physical Specs

Radius

14.20 R⊕

Radius (Jupiter)

1.270 R♃

Mass

168.45 M⊕

Mass (Jupiter)

0.530 M♃

Density

0.32 g/cm³

Surface Gravity

0.84 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.258

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#334of 1771

top 18.8%

This planet

14.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

OGLE-2011-BLG-0251L b 14.20 R⊕ HIP 57274 c 14.20 R⊕ HD 187123 b 14.20 R⊕

Metric	Earth	HD 63765 b	Jupiter
Radius (R⊕)	1.00	14.20	11.21
Mass (M⊕)	1.00	168.45	317.83
Density (g/cm³)	5.51	0.32	1.33
Surface Gravity (g)	1.00	0.84	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	168.450 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 63765

HIP

HIP 38041

TIC

TIC 340697083

Gaia DR2

Gaia DR2 5488567574038257280

Gaia DR3

Gaia DR3 5488567574038257280

System

HD 63765

Percentile among Gas Giant cohort

Radius 14.200 R⊕ · percentile 79 / cohort 1771

Mass 168.450 M⊕ · percentile 14 / cohort 1747

Orbital period 358.00 d · percentile 62 / cohort 1533

Distance 32.54 pc · percentile 9 / cohort 1759

ESI 0.258 · percentile 47 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

358.000 days

Semi-major axis

0.9400 AU

Eccentricity

0.240

Inclination

— °

Year Length

A year here lasts approximately 358.00 Earth days (98.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.9400 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.258

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Segransan et al. 2011

Instrument

HARPS Spectrograph

Publication

2011-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at La Silla Observatory (12 shown).

GJ 581 e · Super-Earth HD 125612 c · Neptune-like HD 90156 b · Neptune-like HD 147018 c · Gas Giant HD 103197 b · Neptune-like HD 125612 d · Gas Giant HIP 70849 b · Gas Giant HD 85390 b · Neptune-like HD 190984 b · Gas Giant HD 171238 b · Gas Giant HD 290327 b · Gas Giant HD 147018 b · Gas Giant

Host System: HD 63765

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,449 K — cooler than the Sun (5,778 K)

Estimated Age

4.77 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.830 R☉

Stellar Mass

0.650 M☉

Metallicity [Fe/H]

-0.16

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

2.263 g/cm³

Systemic radial velocity

22.45 km/s

Rotational v·sin i

1.63 km/s

Rotation period

23.00 days

Metallicity ratio

[Fe/H]

Distance

32.54 parsec

Light-years 106.12 ly

V-band magnitude

8.10 mag

Voyager-speed travel 1,871,485 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

30.705 mas

Total Proper Motion

315.903 mas/yr

PM Right Ascension

148.41 mas/yr

PM Declination

-278.87 mas/yr

Galactic Cartesian (pc)

x = -0.265 · y = 0.521 · z = -0.812

Equatorial (J2000)

RA 116.95826° · Dec -54.26535°

Galactic ℓ, b

267.198° · -14.094°

Ecliptic λ, β

149.695° · -72.142°

HTM-20 index

-1800527001