Key parameters at a glance

A radius of 13.59 Earth radii
A mass of 172.58 Earth masses
Surface gravity around 0.94 g
An orbital period of 3.044 days
Semi-major axis 0.0406 AU
Equilibrium temperature 1,244 K (971 °C)
Distance from Earth 1,375.91 light-years
Earth Similarity Index 0.096
Travel time at Voyager 1 speed 24,264,090 years

HATS-13 b Planet Profile

Physical Specs

Radius

13.59 R⊕

Radius (Jupiter)

1.212 R♃

Mass

172.58 M⊕

Mass (Jupiter)

0.543 M♃

Density

0.38 g/cm³

Surface Gravity

0.94 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.096

HZ Position Inner

Controversial No

Discovery

Year 2015

Method Transit

Facility HATSouth

Telescope 0.18 m Takahashi Epsilon Astrograph

Size rank in cohort

Rank by radius

#656of 1771

top 37.0%

This planet

13.59R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-28 b 13.59 R⊕ TOI-3856 b 13.60 R⊕ TOI-2107 b 13.57 R⊕

Metric	Earth	HATS-13 b	Jupiter
Radius (R⊕)	1.00	13.59	11.21
Mass (M⊕)	1.00	172.58	317.83
Density (g/cm³)	5.51	0.38	1.33
Surface Gravity (g)	1.00	0.94	2.53
Insolation (S⊕)	1.00	315.99	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	172.582 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 289793076

Gaia DR2

Gaia DR2 6803000980210856704

Gaia DR3

Gaia DR3 6803000980210856704

System

HATS-13

Percentile among Gas Giant cohort

Radius 13.585 R⊕ · percentile 63 / cohort 1771

Mass 172.582 M⊕ · percentile 15 / cohort 1747

Orbital period 3.04 d · percentile 16 / cohort 1533

Distance 421.86 pc · percentile 71 / cohort 1759

ESI 0.096 · percentile 25 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.044 days

Semi-major axis

0.0406 AU

Eccentricity

0.181

Inclination

88.55 °

Year Length

A year here lasts approximately 3.04 Earth days (0.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0406 AU.

Transit Fingerprint

Depth

2.281 %

Duration

2.635 h

Impact parameter b

0.249

Rp / R★

0.140200

Transit midpoint (BJD)

2,456,340.3171

Photometric dip

Transit produces a flux drop of 22,807 ppm lasting ≈ 2.63 h.

Extended Orbital Architecture

Planet / star radius ratio

0.140200

Semi-major axis / stellar radius

9.820

Impact parameter (b)

0.249

RV semi-amplitude (K)

78.000 m/s

Transit mid-time (BJD)

2,456,340.3171

Angular separation (arcsec)

0.09620

Eq. Temperature

1,244K

(971 °C)

Insolation (S⊕)

315.99

Earth = 1.00

Earth Similarity (ESI)

0.096

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

Mancini et al. 2015

Instrument

Apogee 4K CCD Sensor

Publication

2015-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2015 at HATSouth (6 shown).

HATS-6 b · Gas Giant HATS-7 b · Neptune-like HATS-14 b · Gas Giant HATS-10 b · Gas Giant HATS-8 b · Neptune-like HATS-9 b · Gas Giant

Host System: HATS-13

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,523 K — cooler than the Sun (5,778 K)

Estimated Age

2.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.887 R☉

Stellar Mass

0.962 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.524 dex

Stellar density

1.930 g/cm³

Systemic radial velocity

25.80 km/s

Rotational v·sin i

2.82 km/s

Metallicity ratio

[Fe/H]

Distance

421.86 parsec

Light-years 1,375.91 ly

V-band magnitude

13.91 mag

Voyager-speed travel 24,264,090 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

2.343 mas

Total Proper Motion

10.884 mas/yr

PM Right Ascension

3.48 mas/yr

PM Declination

-10.31 mas/yr

Galactic Cartesian (pc)

x = 0.656 · y = -0.613 · z = -0.440

Equatorial (J2000)

RA 316.96148° · Dec -26.09672°

Galactic ℓ, b

20.649° · -40.444°

Ecliptic λ, β

311.673° · -9.195°

HTM-20 index

892471239