Key parameters at a glance

A radius of 14.93 Earth radii
A mass of 118.23 Earth masses
Surface gravity around 0.53 g
An orbital period of 4.014 days
Semi-major axis 0.0499 AU
Equilibrium temperature 1,622 K (1349 °C)
Distance from Earth 1,681.63 light-years
Earth Similarity Index 0.061
Travel time at Voyager 1 speed 29,655,503 years

HAT-P-58 b Planet Profile

Physical Specs

Radius

14.93 R⊕

Radius (Jupiter)

1.332 R♃

Mass

118.23 M⊕

Mass (Jupiter)

0.372 M♃

Density

0.19 g/cm³

Surface Gravity

0.53 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.061

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility HATNet

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#236of 1771

top 13.3%

This planet

14.93R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-35 b 14.93 R⊕ WASP-184 b 14.91 R⊕ WASP-7 b 14.91 R⊕

Metric	Earth	HAT-P-58 b	Jupiter
Radius (R⊕)	1.00	14.93	11.21
Mass (M⊕)	1.00	118.23	317.83
Density (g/cm³)	5.51	0.19	1.33
Surface Gravity (g)	1.00	0.53	2.53
Insolation (S⊕)	1.00	1,146.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	118.232 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 9443323

Gaia DR2

Gaia DR2 277493615044741376

Gaia DR3

Gaia DR3 277493615044741376

System

HAT-P-58

Percentile among Gas Giant cohort

Radius 14.930 R⊕ · percentile 87 / cohort 1771

Mass 118.232 M⊕ · percentile 8 / cohort 1747

Orbital period 4.01 d · percentile 29 / cohort 1533

Distance 515.59 pc · percentile 75 / cohort 1759

ESI 0.061 · percentile 9 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.014 days

Semi-major axis

0.0499 AU

Eccentricity

0.073

Inclination

85.64 °

Year Length

A year here lasts approximately 4.01 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0499 AU.

Transit Fingerprint

Depth

0.856 %

Duration

4.150 h

Impact parameter b

0.534

Rp / R★

0.089500

Transit midpoint (BJD)

2,457,369.0309

Photometric dip

Transit produces a flux drop of 8,561 ppm lasting ≈ 4.15 h.

Extended Orbital Architecture

Planet / star radius ratio

0.089500

Semi-major axis / stellar radius

7.020

Impact parameter (b)

0.534

RV semi-amplitude (K)

46.400 m/s

Transit mid-time (BJD)

2,457,369.0309

Angular separation (arcsec)

0.09690

Eq. Temperature

1,622K

(1349 °C)

Insolation (S⊕)

1,146.00

Earth = 1.00

Earth Similarity (ESI)

0.061

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

Bakos et al. 2021

Instrument

Apogee 4K CCD Sensor

Publication

2021-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at HATNet (6 shown).

HAT-P-59 b · Gas Giant HAT-P-61 b · Gas Giant HAT-P-63 b · Gas Giant HAT-P-62 b · Gas Giant HAT-P-60 b · Gas Giant HAT-P-64 b · Gas Giant

Host System: HAT-P-58

Spectral Class

F-type yellow-white

Effective Temperature

6,078 K — hotter than the Sun (5,778 K)

Estimated Age

7.11 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.530 R☉

Stellar Mass

1.031 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

4.082 dex

Stellar density

0.405 g/cm³

Systemic radial velocity

-35.97 km/s

Metallicity ratio

[Fe/H]

Distance

515.59 parsec

Light-years 1,681.63 ly

V-band magnitude

12.93 mag

Voyager-speed travel 29,655,503 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.912 mas

Total Proper Motion

16.098 mas/yr

PM Right Ascension

-10.88 mas/yr

PM Declination

11.86 mas/yr

Galactic Cartesian (pc)

x = 0.197 · y = 0.510 · z = 0.837

Equatorial (J2000)

RA 68.84651° · Dec 56.86827°

Galactic ℓ, b

150.049° · 6.301°

Ecliptic λ, β

76.159° · 34.441°

HTM-20 index

-1970695078