Confirmed Exoplanet Discovered 2018

HATS-60 b

A gas giant orbiting the g-type yellow (sun-like) HATS-60, located approximately 1,586.7 light-years from Earth.

Key parameters at a glance

  • A radius of 12.92 Earth radii
  • A mass of 210.40 Earth masses
  • Surface gravity around 1.26 g
  • An orbital period of 3.561 days
  • Semi-major axis 0.0471 AU
  • Equilibrium temperature 1,528 K (1255 °C)
  • Distance from Earth 1,586.66 light-years
  • Earth Similarity Index 0.082
  • Travel time at Voyager 1 speed 27,980,821 years

HATS-60 b Planet Profile

Physical Specs

Radius
12.92 R⊕
Radius (Jupiter)
1.153 R♃
Mass
210.40 M⊕
Mass (Jupiter)
0.662 M♃
Density
0.54 g/cm³
Surface Gravity
1.26 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.082
HZ Position Inner
Controversial No

Discovery

Year 2018
Method Transit
Facility HATSouth
Telescope 0.18 m Takahashi Epsilon Astrograph

Size rank in cohort

Rank by radius

#1009of 1771

top 56.9%

This planet

12.92R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth HATS-60 b Jupiter
Radius (R⊕)1.0012.9211.21
Mass (M⊕)1.00210.40317.83
Density (g/cm³)5.510.541.33
Surface Gravity (g)1.001.262.53
Insolation (S⊕)1.00903.900.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 210.403 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 145750719

Gaia DR2

Gaia DR2 2596986648798061952

Gaia DR3

Gaia DR3 2596986648798061952

System

HATS-60

Percentile among Gas Giant cohort

Radius 12.924 R⊕ · percentile 43 / cohort 1771
Mass 210.403 M⊕ · percentile 22 / cohort 1747
Orbital period 3.56 d · percentile 24 / cohort 1533
Distance 486.47 pc · percentile 74 / cohort 1759
ESI 0.082 · percentile 19 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
3.561 days
Semi-major axis
0.0471 AU
Eccentricity
0.191
Inclination
86.28 °

Year Length

A year here lasts approximately 3.56 Earth days (1.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0471 AU.

Transit Fingerprint

Depth

0.489 %

Duration

3.859 h

Impact parameter b

0.450

Rp / R★

0.081100

Transit midpoint (BJD)

2,458,015.7236

Photometric dip

Transit produces a flux drop of 4,890 ppm lasting ≈ 3.86 h.

Extended Orbital Architecture

Planet / star radius ratio

0.081100

Semi-major axis / stellar radius

6.930

Impact parameter (b)

0.450

RV semi-amplitude (K)

82.600 m/s

Transit mid-time (BJD)

2,458,015.7236

Angular separation (arcsec)

0.09680

Eq. Temperature

1,528K

(1255 °C)

Insolation (S⊕)

903.90

Earth = 1.00

Earth Similarity (ESI)

0.082

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

Hartman et al. 2019

Instrument

Apogee 4K CCD Sensor

Publication

2019-02

Observation locale

Ground

Host System: HATS-60

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,688 K — cooler than the Sun (5,778 K)

Estimated Age

7.55 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.460 R☉

Stellar Mass

1.097 M☉

Metallicity [Fe/H]

0.34

Extended Stellar Properties

Surface gravity (log g)

4.148 dex

Stellar density

0.496 g/cm³

Systemic radial velocity

28.38 km/s

Rotational v·sin i

3.84 km/s

Metallicity ratio

[Fe/H]

Distance
486.47 parsec
Light-years 1,586.66 ly
V-band magnitude
12.66 mag
Voyager-speed travel 27,980,821 yr

Multi-band Host Photometry — 14 bands

8.913.413.39B12.66V12.50Gaia12.02TESS12.99Sloan g12.44Sloan r12.29Sloan i11.38J11.07H10.99K10.93W111.00W210.73W38.88W4

Astrometric Data

Parallax

2.027 mas

Total Proper Motion

4.459 mas/yr

PM Right Ascension

3.48 mas/yr

PM Declination

-2.79 mas/yr

Galactic Cartesian (pc)

x = 0.915 · y = -0.309 · z = -0.259

Equatorial (J2000)

RA 341.36403° · Dec -14.99177°

Galactic ℓ, b

49.000° · -58.321°

Ecliptic λ, β

337.125° · -6.578°

HTM-20 index

1346175483

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