Key parameters at a glance

A radius of 12.46 Earth radii
A mass of 492.62 Earth masses
Surface gravity around 3.17 g
An orbital period of 2.311 days
Semi-major axis 0.0334 AU
Equilibrium temperature 1,480 K (1207 °C)
Distance from Earth 892.70 light-years
Earth Similarity Index 0.101
Travel time at Voyager 1 speed 15,742,742 years

WASP-65 b Planet Profile

Physical Specs

Radius

12.46 R⊕

Radius (Jupiter)

1.112 R♃

Mass

492.62 M⊕

Mass (Jupiter)

1.550 M♃

Density

1.50 g/cm³

Surface Gravity

3.17 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.101

HZ Position Inner

Controversial No

Discovery

Year 2013

Method Transit

Facility SuperWASP

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#1283of 1771

top 72.4%

This planet

12.46R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Kepler-302 c 12.45 R⊕ KELT-1 b 12.44 R⊕ KOI-217 b 12.44 R⊕

Metric	Earth	WASP-65 b	Jupiter
Radius (R⊕)	1.00	12.46	11.21
Mass (M⊕)	1.00	492.62	317.83
Density (g/cm³)	5.51	1.50	1.33
Surface Gravity (g)	1.00	3.17	2.53
Insolation (S⊕)	1.00	957.01	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	492.620 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 444013020

Gaia DR2

Gaia DR2 596931979481073152

Gaia DR3

Gaia DR3 596931979481073152

System

WASP-65

Percentile among Gas Giant cohort

Radius 12.464 R⊕ · percentile 28 / cohort 1771

Mass 492.620 M⊕ · percentile 48 / cohort 1747

Orbital period 2.31 d · percentile 10 / cohort 1533

Distance 273.70 pc · percentile 57 / cohort 1759

ESI 0.101 · percentile 27 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.311 days

Semi-major axis

0.0334 AU

Eccentricity

0.000

Inclination

88.80 °

Year Length

A year here lasts approximately 2.31 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0334 AU.

Transit Fingerprint

Depth

1.280 %

Duration

2.735 h

Impact parameter b

0.149

Rp / R★

0.113100

Transit midpoint (BJD)

2,456,110.6877

Photometric dip

Transit produces a flux drop of 12,800 ppm lasting ≈ 2.74 h.

Extended Orbital Architecture

Planet / star radius ratio

0.113100

Semi-major axis / stellar radius

7.110

Impact parameter (b)

0.149

RV semi-amplitude (K)

249.000 m/s

Transit mid-time (BJD)

2,456,110.6877

Angular separation (arcsec)

0.12200

Eq. Temperature

1,480K

(1207 °C)

Insolation (S⊕)

957.01

Earth = 1.00

Earth Similarity (ESI)

0.101

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Gomez et al. 2013

Instrument

iKon-L CCD Camera

Publication

2013-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2013 at SuperWASP (2 shown).

WASP-8 c · Gas Giant WASP-75 b · Gas Giant

Host System: WASP-65

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,600 K — cooler than the Sun (5,778 K)

Estimated Age

8.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.010 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

1.280 g/cm³

Systemic radial velocity

-3.19 km/s

Rotational v·sin i

3.60 km/s

Metallicity ratio

[Fe/H]

Distance

273.70 parsec

Light-years 892.70 ly

V-band magnitude

11.87 mag

Voyager-speed travel 15,742,742 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.625 mas

Total Proper Motion

4.265 mas/yr

PM Right Ascension

2.76 mas/yr

PM Declination

3.25 mas/yr

Galactic Cartesian (pc)

x = -0.679 · y = 0.719 · z = 0.148

Equatorial (J2000)

RA 133.32430° · Dec 8.52302°

Galactic ℓ, b

219.406° · 30.919°

Ecliptic λ, β

133.337° · -8.639°

HTM-20 index

-519442384