Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 4,036.44 Earth masses
Surface gravity around 26.68 g
An orbital period of 1,422.000 days
Semi-major axis 2.5040 AU
Equilibrium temperature 176 K (-97 °C)
Distance from Earth 2,096.80 light-years
Earth Similarity Index 0.309
Travel time at Voyager 1 speed 36,977,150 years

1 sibling around HATS-59

HATS-59 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HATS-59 b	Gas Giant	12.62	256.17	5.416	1,128	2018
HATS-59 c this	Gas Giant	12.30	4,036.44	1,422.000	176	2018

HATS-59 c Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.100 R♃

Mass

4,036.44 M⊕

Mass (Jupiter)

12.700 M♃

Density

11.90 g/cm³

Surface Gravity

26.68 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.309

HZ Position Outer

Controversial No

Discovery

Year 2018

Method Radial Velocity

Facility HATSouth

Telescope 0.18 m Takahashi Epsilon Astrograph

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕

Metric	Earth	HATS-59 c	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	4,036.44	317.83
Density (g/cm³)	5.51	11.90	1.33
Surface Gravity (g)	1.00	26.68	2.53
Insolation (S⊕)	1.00	0.16	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	4,036.441 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 437261733

Gaia DR2

Gaia DR2 3538256769264276480

Gaia DR3

Gaia DR3 3538256769264276480

System

HATS-59

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 4,036.441 M⊕ · percentile 91 / cohort 1747

Orbital period 1,422.00 d · percentile 82 / cohort 1533

Distance 642.88 pc · percentile 80 / cohort 1759

ESI 0.309 · percentile 61 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,422.000 days

Semi-major axis

2.5040 AU

Eccentricity

0.083

Inclination

— °

Year Length

A year here lasts about 3.89 Earth years on a nearly circular orbit at a mean orbital distance of 2.5040 AU.

Eq. Temperature

176K

(-97 °C)

Insolation (S⊕)

0.16

Earth = 1.00

Earth Similarity (ESI)

0.309

0 = alien, 1 = Earth-identical

Beyond the outer HZ boundary (too cold) — surface water would be frozen.

Discovery Paper

Primary reference

Sarkis et al. 2018

Instrument

Apogee 4K CCD Sensor

Publication

2018-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2018 at HATSouth (12 shown).

HATS-36 b · Gas Giant HATS-61 b · Gas Giant HATS-59 b · Gas Giant HATS-46 b · Gas Giant HATS-44 b · Gas Giant HATS-43 b · Gas Giant HATS-69 b · Gas Giant HATS-63 b · Gas Giant HATS-41 b · Gas Giant HATS-60 b · Gas Giant HATS-45 b · Gas Giant HATS-68 b · Gas Giant

Host System: HATS-59

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,670 K — cooler than the Sun (5,778 K)

Estimated Age

4.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.036 R☉

Stellar Mass

1.038 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.422 dex

Stellar density

1.310 g/cm³

Systemic radial velocity

-10.89 km/s

Rotational v·sin i

2.80 km/s

Metallicity ratio

[Fe/H]

Distance

642.88 parsec

Light-years 2,096.80 ly

V-band magnitude

14.03 mag

Voyager-speed travel 36,977,150 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

1.527 mas

Total Proper Motion

24.184 mas/yr

PM Right Ascension

-24.17 mas/yr

PM Declination

0.93 mas/yr

Galactic Cartesian (pc)

x = -0.911 · y = 0.155 · z = -0.381

Equatorial (J2000)

RA 170.32433° · Dec -22.38818°

Galactic ℓ, b

276.989° · 35.902°

Ecliptic λ, β

180.557° · -24.284°

HTM-20 index

1753159107