Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 645.19 Earth masses
Surface gravity around 3.59 g
An orbital period of 5,370.000 days
Semi-major axis 5.7500 AU
Distance from Earth 114.55 light-years
Earth Similarity Index 0.366
Travel time at Voyager 1 speed 2,020,047 years

1 sibling around HD 65216

HD 65216 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HD 65216 b	Gas Giant	13.60	411.59	577.600	—	2003
HD 65216 c this	Gas Giant	13.40	645.19	5,370.000	—	2013

HD 65216 c Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.190 R♃

Mass

645.19 M⊕

Mass (Jupiter)

2.030 M♃

Density

1.47 g/cm³

Surface Gravity

3.59 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.366

HZ Position Unknown

Controversial No

Discovery

Year 2013

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 65216 c	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	645.19	317.83
Density (g/cm³)	5.51	1.47	1.33
Surface Gravity (g)	1.00	3.59	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	645.195 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 65216

HIP

HIP 38558

TIC

TIC 382625142

Gaia DR2

Gaia DR2 5287961677550103424

Gaia DR3

Gaia DR3 5287961677550103424

System

HD 65216

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 645.195 M⊕ · percentile 56 / cohort 1747

Orbital period 5,370.00 d · percentile 93 / cohort 1533

Distance 35.12 pc · percentile 10 / cohort 1759

ESI 0.366 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

5,370.000 days

Semi-major axis

5.7500 AU

Eccentricity

0.170

Inclination

— °

Year Length

A year here lasts about 14.70 Earth years on a mildly elliptical path at a mean orbital distance of 5.7500 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.366

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Wittenmyer et al. 2013

Instrument

HARPS Spectrograph

Publication

2013-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2013 at La Silla Observatory (10 shown).

GJ 667 C c · Super-Earth GJ 163 c · Sub-Neptune HD 40307 f · Sub-Neptune GJ 163 b · Sub-Neptune HD 109271 b · Neptune-like HD 109271 c · Neptune-like POTS-1 b · Gas Giant GJ 163 d · Neptune-like BD-06 1339 c · Neptune-like HD 103774 b · Gas Giant

Host System: HD 65216

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,612 K — cooler than the Sun (5,778 K)

Estimated Age

4.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.880 R☉

Stellar Mass

0.874 M☉

Metallicity [Fe/H]

-0.17

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

2.023 g/cm³

Systemic radial velocity

42.67 km/s

Rotational v·sin i

1.00 km/s

Metallicity ratio

[M/H]

Distance

35.12 parsec

Light-years 114.55 ly

V-band magnitude

7.97 mag

Voyager-speed travel 2,020,047 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

28.445 mas

Total Proper Motion

191.755 mas/yr

PM Right Ascension

-123.63 mas/yr

PM Declination

146.58 mas/yr

Galactic Cartesian (pc)

x = -0.211 · y = 0.390 · z = -0.896

Equatorial (J2000)

RA 118.42096° · Dec -63.64669°

Galactic ℓ, b

276.274° · -17.614°

Ecliptic λ, β

179.521° · -77.802°

HTM-20 index

236945258

Observation Record

Photometric series

RV measurements

Archive notes