Confirmed Exoplanet Discovered 2018

HATS-67 b

A gas giant orbiting the f-type yellow-white HATS-67, located approximately 3,131.5 light-years from Earth.

Key parameters at a glance

  • A radius of 18.89 Earth radii
  • A mass of 460.85 Earth masses
  • Surface gravity around 1.29 g
  • An orbital period of 1.609 days
  • Semi-major axis 0.0303 AU
  • Equilibrium temperature 2,193 K (1920 °C)
  • Distance from Earth 3,131.45 light-years
  • Earth Similarity Index 0.045
  • Travel time at Voyager 1 speed 55,223,173 years

HATS-67 b Planet Profile

Physical Specs

Radius
18.89 R⊕
Radius (Jupiter)
1.685 R♃
Mass
460.85 M⊕
Mass (Jupiter)
1.450 M♃
Density
0.37 g/cm³
Surface Gravity
1.29 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.045
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

#47of 1771

top 2.6%

This planet

18.89R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth HATS-67 b Jupiter
Radius (R⊕)1.0018.8911.21
Mass (M⊕)1.00460.85317.83
Density (g/cm³)5.510.371.33
Surface Gravity (g)1.001.292.53
Insolation (S⊕)1.003,821.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 460.854 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 272212970

Gaia DR2

Gaia DR2 6144060260072337024

Gaia DR3

Gaia DR3 6144060260072337024

System

HATS-67

Percentile among Gas Giant cohort

Radius 18.887 R⊕ · percentile 97 / cohort 1771
Mass 460.854 M⊕ · percentile 46 / cohort 1747
Orbital period 1.61 d · percentile 4 / cohort 1533
Distance 960.11 pc · percentile 86 / cohort 1759
ESI 0.045 · percentile 3 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
1.609 days
Semi-major axis
0.0303 AU
Eccentricity
0.057
Inclination
79.03 °

Year Length

A year here lasts approximately 1.61 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0303 AU.

Transit Fingerprint

Depth

1.345 %

Duration

1.946 h

Impact parameter b

0.861

Rp / R★

0.120100

Transit midpoint (BJD)

2,457,796.8813

Photometric dip

Transit produces a flux drop of 13,450 ppm lasting ≈ 1.95 h.

Extended Orbital Architecture

Planet / star radius ratio

0.120100

Semi-major axis / stellar radius

4.526

Impact parameter (b)

0.861

RV semi-amplitude (K)

194.000 m/s

Transit mid-time (BJD)

2,457,796.8813

Angular separation (arcsec)

0.03160

Eq. Temperature

2,193K

(1920 °C)

Insolation (S⊕)

3,821.00

Earth = 1.00

Earth Similarity (ESI)

0.045

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-67

Spectral Class

F-type yellow-white

Effective Temperature

6,594 K — hotter than the Sun (5,778 K)

Estimated Age

0.51 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.441 R☉

Stellar Mass

1.435 M☉

Metallicity [Fe/H]

0.33

Extended Stellar Properties

Surface gravity (log g)

4.278 dex

Stellar density

0.677 g/cm³

Systemic radial velocity

-23.37 km/s

Rotational v·sin i

5.19 km/s

Metallicity ratio

[Fe/H]

Distance
960.11 parsec
Light-years 3,131.45 ly
V-band magnitude
13.70 mag
Voyager-speed travel 55,223,173 yr

Multi-band Host Photometry — 14 bands

9.214.214.21B13.70V13.56Gaia13.17TESS13.88Sloan g13.55Sloan r13.43Sloan i12.64J12.35H12.33K12.25W112.27W211.76W39.17W4

Astrometric Data

Parallax

1.013 mas

Total Proper Motion

6.135 mas/yr

PM Right Ascension

-6.08 mas/yr

PM Declination

0.80 mas/yr

Galactic Cartesian (pc)

x = -0.693 · y = -0.003 · z = -0.721

Equatorial (J2000)

RA 180.20879° · Dec -46.13642°

Galactic ℓ, b

293.856° · 15.842°

Ecliptic λ, β

202.643° · -41.337°

HTM-20 index

123568458

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