Key parameters at a glance

A radius of 18.79 Earth radii
A mass of 1,137.83 Earth masses
Surface gravity around 3.22 g
An orbital period of 4.787 days
Semi-major axis 0.0656 AU
Equilibrium temperature 1,930 K (1657 °C)
Distance from Earth 1,113.05 light-years
Earth Similarity Index 0.062
Travel time at Voyager 1 speed 19,628,631 years

HAT-P-69 b Planet Profile

Physical Specs

Radius

18.79 R⊕

Radius (Jupiter)

1.676 R♃

Mass

1,137.83 M⊕

Mass (Jupiter)

3.580 M♃

Density

1.02 g/cm³

Surface Gravity

3.22 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.062

HZ Position Inner

Controversial No

Discovery

Year 2019

Method Transit

Facility HATNet

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#50of 1771

top 2.8%

This planet

18.79R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HATS-64 b 18.82 R⊕ CoRoT-35 b 18.83 R⊕ HATS-67 b 18.89 R⊕

Metric	Earth	HAT-P-69 b	Jupiter
Radius (R⊕)	1.00	18.79	11.21
Mass (M⊕)	1.00	1,137.83	317.83
Density (g/cm³)	5.51	1.02	1.33
Surface Gravity (g)	1.00	3.22	2.53
Insolation (S⊕)	1.00	2,320.18	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,137.831 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 379929661

Gaia DR2

Gaia DR2 3080104185367102592

Gaia DR3

Gaia DR3 3080104185367102592

System

HAT-P-69

Percentile among Gas Giant cohort

Radius 18.786 R⊕ · percentile 97 / cohort 1771

Mass 1,137.831 M⊕ · percentile 69 / cohort 1747

Orbital period 4.79 d · percentile 35 / cohort 1533

Distance 341.26 pc · percentile 64 / cohort 1759

ESI 0.062 · percentile 10 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.787 days

Semi-major axis

0.0656 AU

Eccentricity

0.000

Inclination

87.19 °

Year Length

A year here lasts approximately 4.79 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0655 AU.

Transit Fingerprint

Depth

0.763 %

Duration

5.126 h

Impact parameter b

0.366

Rp / R★

0.087030

Transit midpoint (BJD)

2,458,495.7886

Photometric dip

Transit produces a flux drop of 7,627 ppm lasting ≈ 5.13 h.

Extended Orbital Architecture

Planet / star radius ratio

0.087030

Semi-major axis / stellar radius

7.320

Impact parameter (b)

0.366

RV semi-amplitude (K)

309.000 m/s

Transit mid-time (BJD)

2,458,495.7886

Sky-projected obliquity (λ)

21.20°

Angular separation (arcsec)

0.19200

Eq. Temperature

1,930K

(1657 °C)

Insolation (S⊕)

2,320.18

Earth = 1.00

Earth Similarity (ESI)

0.062

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

Zhou et al. 2019

Instrument

2K CCD Sensor

Publication

2019-10

Observation locale

Ground

Host System: HAT-P-69

Spectral Class

F-type yellow-white

Effective Temperature

7,394 K — hotter than the Sun (5,778 K)

Estimated Age

1.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.926 R☉

Stellar Mass

1.648 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.110 dex

Stellar density

0.365 g/cm³

Systemic radial velocity

0.78 km/s

Rotational v·sin i

77.44 km/s

Metallicity ratio

[Fe/H]

Distance

341.26 parsec

Light-years 1,113.05 ly

V-band magnitude

9.77 mag

Voyager-speed travel 19,628,631 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

2.902 mas

Total Proper Motion

3.021 mas/yr

PM Right Ascension

-2.86 mas/yr

PM Declination

0.98 mas/yr

Galactic Cartesian (pc)

x = -0.648 · y = 0.759 · z = 0.065

Equatorial (J2000)

RA 130.50564° · Dec 3.71057°

Galactic ℓ, b

222.786° · 26.206°

Ecliptic λ, β

131.916° · -14.030°

HTM-20 index

1603825752