Confirmed Exoplanet Discovered 2018

HATS-41 b

A gas giant orbiting the f-type yellow-white HATS-41, located approximately 2,405.9 light-years from Earth.

Key parameters at a glance

  • A radius of 14.91 Earth radii
  • A mass of 3,082.95 Earth masses
  • Surface gravity around 13.87 g
  • An orbital period of 4.194 days
  • Semi-major axis 0.0583 AU
  • Equilibrium temperature 1,710 K (1437 °C)
  • Distance from Earth 2,405.95 light-years
  • Earth Similarity Index 0.091
  • Travel time at Voyager 1 speed 42,428,898 years

HATS-41 b Planet Profile

Physical Specs

Radius
14.91 R⊕
Radius (Jupiter)
1.330 R♃
Mass
3,082.95 M⊕
Mass (Jupiter)
9.700 M♃
Density
5.10 g/cm³
Surface Gravity
13.87 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.091
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

#237of 1771

top 13.3%

This planet

14.91R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth HATS-41 b Jupiter
Radius (R⊕)1.0014.9111.21
Mass (M⊕)1.003,082.95317.83
Density (g/cm³)5.515.101.33
Surface Gravity (g)1.0013.872.53
Insolation (S⊕)1.001,300.310.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 3,082.951 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 53750200

Gaia DR2

Gaia DR2 2919151080524391552

Gaia DR3

Gaia DR3 2919151080524391552

System

HATS-41

Percentile among Gas Giant cohort

Radius 14.908 R⊕ · percentile 86 / cohort 1771
Mass 3,082.951 M⊕ · percentile 87 / cohort 1747
Orbital period 4.19 d · percentile 31 / cohort 1533
Distance 737.67 pc · percentile 82 / cohort 1759
ESI 0.091 · percentile 23 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
4.194 days
Semi-major axis
0.0583 AU
Eccentricity
0.380
Inclination
80.40 °

Year Length

A year here lasts approximately 4.19 Earth days (1.1% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0583 AU.

Transit Fingerprint

Depth

0.480 %

Duration

2.196 h

Impact parameter b

0.849

Rp / R★

0.079800

Transit midpoint (BJD)

2,456,795.7240

Photometric dip

Transit produces a flux drop of 4,804 ppm lasting ≈ 2.20 h.

Extended Orbital Architecture

Planet / star radius ratio

0.079800

Semi-major axis / stellar radius

7.310

Impact parameter (b)

0.849

RV semi-amplitude (K)

1,080.000 m/s

Transit mid-time (BJD)

2,456,795.7240

Long. of periastron (ω)

136.00°

Angular separation (arcsec)

0.07900

Eq. Temperature

1,710K

(1437 °C)

Insolation (S⊕)

1,300.31

Earth = 1.00

Earth Similarity (ESI)

0.091

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

Bento et al. 2018

Instrument

Apogee 4K CCD Sensor

Publication

2018-07

Observation locale

Ground

Host System: HATS-41

Spectral Class

F-type yellow-white

Effective Temperature

6,424 K — hotter than the Sun (5,778 K)

Estimated Age

1.34 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.710 R☉

Stellar Mass

1.496 M☉

Metallicity [Fe/H]

0.47

Extended Stellar Properties

Surface gravity (log g)

4.140 dex

Stellar density

0.420 g/cm³

Systemic radial velocity

37.25 km/s

Rotational v·sin i

19.21 km/s

Metallicity ratio

[Fe/H]

Distance
737.67 parsec
Light-years 2,405.95 ly
V-band magnitude
12.68 mag
Voyager-speed travel 42,428,898 yr

Multi-band Host Photometry — 14 bands

9.013.213.18B12.68V12.59Gaia12.23TESS12.89Sloan g12.56Sloan r12.48Sloan i11.77J11.52H11.50K11.44W111.46W211.42W39.03W4

Astrometric Data

Parallax

1.327 mas

Total Proper Motion

4.760 mas/yr

PM Right Ascension

-0.14 mas/yr

PM Declination

-4.76 mas/yr

Galactic Cartesian (pc)

x = -0.208 · y = 0.866 · z = -0.455

Equatorial (J2000)

RA 103.51736° · Dec -27.05042°

Galactic ℓ, b

237.621° · -11.436°

Ecliptic λ, β

108.737° · -49.614°

HTM-20 index

-1867616331

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