Key parameters at a glance

A radius of 12.50 Earth radii
A mass of 104.88 Earth masses
Surface gravity around 0.67 g
An orbital period of 492.300 days
Semi-major axis 1.2000 AU
Distance from Earth 166.88 light-years
Earth Similarity Index 0.263
Travel time at Voyager 1 speed 2,942,940 years

HD 564 b Planet Profile

Physical Specs

Radius

12.50 R⊕

Radius (Jupiter)

1.120 R♃

Mass

104.88 M⊕

Mass (Jupiter)

0.330 M♃

Density

0.30 g/cm³

Surface Gravity

0.67 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.263

HZ Position Unknown

Controversial No

Discovery

Year 2014

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#1235of 1771

top 69.7%

This planet

12.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 156279 c 12.50 R⊕ HD 33283 b 12.50 R⊕ HD 156279 b 12.50 R⊕

Metric	Earth	HD 564 b	Jupiter
Radius (R⊕)	1.00	12.50	11.21
Mass (M⊕)	1.00	104.88	317.83
Density (g/cm³)	5.51	0.30	1.33
Surface Gravity (g)	1.00	0.67	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	104.880 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 564

HIP

HIP 801

TIC

TIC 200658785

Gaia DR2

Gaia DR2 4973621989046219008

Gaia DR3

Gaia DR3 4973621989046219008

System

HD 564

Percentile among Gas Giant cohort

Radius 12.500 R⊕ · percentile 28 / cohort 1771

Mass 104.880 M⊕ · percentile 6 / cohort 1747

Orbital period 492.30 d · percentile 67 / cohort 1533

Distance 51.17 pc · percentile 20 / cohort 1759

ESI 0.263 · percentile 48 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

492.300 days

Semi-major axis

1.2000 AU

Eccentricity

0.096

Inclination

— °

Year Length

A year here lasts about 1.35 Earth years on a nearly circular orbit at a mean orbital distance of 1.2000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.263

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Moutou et al. 2015

Instrument

HARPS Spectrograph

Publication

2015-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at La Silla Observatory (4 shown).

HD 108341 b · Gas Giant BD-11 4672 b · Gas Giant HD 103720 b · Gas Giant HD 30669 b · Gas Giant

Host System: HD 564

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,902 K — hotter than the Sun (5,778 K)

Estimated Age

5.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.010 R☉

Stellar Mass

0.961 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

1.870 g/cm³

Systemic radial velocity

11.46 km/s

Rotational v·sin i

2.00 km/s

Activity index (log R'HK)

-4.830

Metallicity ratio

[Fe/H]

Distance

51.17 parsec

Light-years 166.88 ly

V-band magnitude

8.32 mag

Voyager-speed travel 2,942,940 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

19.515 mas

Total Proper Motion

97.478 mas/yr

PM Right Ascension

-95.91 mas/yr

PM Declination

-17.39 mas/yr

Galactic Cartesian (pc)

x = 0.639 · y = 0.028 · z = -0.769

Equatorial (J2000)

RA 2.46945° · Dec -50.26790°

Galactic ℓ, b

319.095° · -65.536°

Ecliptic λ, β

336.273° · -45.769°

HTM-20 index

1476791792