Key parameters at a glance

A radius of 18.28 Earth radii
A mass of 182.43 Earth masses
Surface gravity around 0.55 g
An orbital period of 4.795 days
Semi-major axis 0.0628 AU
Equilibrium temperature 1,772 K (1499 °C)
Distance from Earth 760.66 light-years
Earth Similarity Index 0.050
Travel time at Voyager 1 speed 13,414,256 years

HAT-P-60 b Planet Profile

Physical Specs

Radius

18.28 R⊕

Radius (Jupiter)

1.631 R♃

Mass

182.43 M⊕

Mass (Jupiter)

0.574 M♃

Density

0.16 g/cm³

Surface Gravity

0.55 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.050

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility HATNet

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#61of 1771

top 3.4%

This planet

18.28R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-90 b 18.27 R⊕ Kepler-7 b 18.18 R⊕ NGTS-33 b 18.38 R⊕

Metric	Earth	HAT-P-60 b	Jupiter
Radius (R⊕)	1.00	18.28	11.21
Mass (M⊕)	1.00	182.43	317.83
Density (g/cm³)	5.51	0.16	1.33
Surface Gravity (g)	1.00	0.55	2.53
Insolation (S⊕)	1.00	1,634.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	182.434 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 354469661

Gaia DR2

Gaia DR2 359678187913760384

Gaia DR3

Gaia DR3 359678187913760384

System

HAT-P-60

Percentile among Gas Giant cohort

Radius 18.282 R⊕ · percentile 97 / cohort 1771

Mass 182.434 M⊕ · percentile 17 / cohort 1747

Orbital period 4.79 d · percentile 35 / cohort 1533

Distance 233.22 pc · percentile 54 / cohort 1759

ESI 0.050 · percentile 4 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.795 days

Semi-major axis

0.0628 AU

Eccentricity

0.250

Inclination

83.75 °

Year Length

A year here lasts approximately 4.79 Earth days (1.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0628 AU.

Transit Fingerprint

Depth

0.686 %

Duration

5.035 h

Impact parameter b

0.668

Rp / R★

0.076220

Transit midpoint (BJD)

2,458,360.9403

Photometric dip

Transit produces a flux drop of 6,864 ppm lasting ≈ 5.04 h.

Extended Orbital Architecture

Planet / star radius ratio

0.076220

Semi-major axis / stellar radius

6.146

Impact parameter (b)

0.668

RV semi-amplitude (K)

54.100 m/s

Transit mid-time (BJD)

2,458,360.9403

Angular separation (arcsec)

0.26900

Eq. Temperature

1,772K

(1499 °C)

Insolation (S⊕)

1,634.00

Earth = 1.00

Earth Similarity (ESI)

0.050

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

Bakos et al. 2021

Instrument

Apogee 4K CCD Sensor

Publication

2021-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at HATNet (6 shown).

HAT-P-59 b · Gas Giant HAT-P-61 b · Gas Giant HAT-P-63 b · Gas Giant HAT-P-62 b · Gas Giant HAT-P-58 b · Gas Giant HAT-P-64 b · Gas Giant

Host System: HAT-P-60

Spectral Class

F-type yellow-white

Effective Temperature

6,212 K — hotter than the Sun (5,778 K)

Estimated Age

2.77 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.197 R☉

Stellar Mass

1.435 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

3.911 dex

Stellar density

0.191 g/cm³

Systemic radial velocity

6.58 km/s

Metallicity ratio

[Fe/H]

Distance

233.22 parsec

Light-years 760.66 ly

V-band magnitude

9.73 mag

Voyager-speed travel 13,414,256 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

4.260 mas

Total Proper Motion

27.219 mas/yr

PM Right Ascension

26.51 mas/yr

PM Declination

6.17 mas/yr

Galactic Cartesian (pc)

x = 0.542 · y = 0.291 · z = 0.789

Equatorial (J2000)

RA 28.28257° · Dec 52.05392°

Galactic ℓ, b

132.481° · -9.670°

Ecliptic λ, β

47.011° · 37.418°

HTM-20 index

-1330337358