Key parameters at a glance

A radius of 13.63 Earth radii
A mass of 210.40 Earth masses
Surface gravity around 1.13 g
An orbital period of 3.333 days
Semi-major axis 0.0444 AU
Equilibrium temperature 1,353 K (1080 °C)
Distance from Earth 1,724.79 light-years
Earth Similarity Index 0.087
Travel time at Voyager 1 speed 30,416,749 years

HAT-P-43 b Planet Profile

Physical Specs

Radius

13.63 R⊕

Radius (Jupiter)

1.216 R♃

Mass

210.40 M⊕

Mass (Jupiter)

0.662 M♃

Density

0.39 g/cm³

Surface Gravity

1.13 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.087

HZ Position Inner

Controversial No

Discovery

Year 2012

Method Transit

Facility HATNet

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#607of 1771

top 34.2%

This planet

13.63R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-2570 b 13.64 R⊕ NGTS-24 b 13.61 R⊕ TOI-3135 b 13.65 R⊕

Metric	Earth	HAT-P-43 b	Jupiter
Radius (R⊕)	1.00	13.63	11.21
Mass (M⊕)	1.00	210.40	317.83
Density (g/cm³)	5.51	0.39	1.33
Surface Gravity (g)	1.00	1.13	2.53
Insolation (S⊕)	1.00	521.88	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	210.395 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 468987719

Gaia DR2

Gaia DR2 601321985813952000

Gaia DR3

Gaia DR3 601321985813952000

System

HAT-P-43

Percentile among Gas Giant cohort

Radius 13.630 R⊕ · percentile 66 / cohort 1771

Mass 210.395 M⊕ · percentile 22 / cohort 1747

Orbital period 3.33 d · percentile 21 / cohort 1533

Distance 528.83 pc · percentile 76 / cohort 1759

ESI 0.087 · percentile 21 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.333 days

Semi-major axis

0.0444 AU

Eccentricity

0.000

Inclination

88.70 °

Year Length

A year here lasts approximately 3.33 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0444 AU.

Transit Fingerprint

Depth

1.701 %

Duration

3.125 h

Impact parameter b

0.070

Rp / R★

0.115800

Transit midpoint (BJD)

2,458,253.5966

Photometric dip

Transit produces a flux drop of 17,008 ppm lasting ≈ 3.13 h.

Extended Orbital Architecture

Planet / star radius ratio

0.115800

Semi-major axis / stellar radius

8.860

Impact parameter (b)

0.070

RV semi-amplitude (K)

87.700 m/s

Transit mid-time (BJD)

2,458,253.5966

Angular separation (arcsec)

0.08400

Eq. Temperature

1,353K

(1080 °C)

Insolation (S⊕)

521.88

Earth = 1.00

Earth Similarity (ESI)

0.087

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

Boisse et al. 2013

Instrument

2K CCD Sensor

Publication

2013-10

Observation locale

Ground

Discovery cohort

Planets confirmed in 2012 at HATNet (5 shown).

HAT-P-38 b · Neptune-like HAT-P-42 b · Gas Giant HAT-P-39 b · Gas Giant HAT-P-40 b · Gas Giant HAT-P-41 b · Gas Giant

Host System: HAT-P-43

Spectral Class

F-type yellow-white

Effective Temperature

5,693 K — cooler than the Sun (5,778 K)

Estimated Age

5.70 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.080 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

0.20

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

1.052 g/cm³

Systemic radial velocity

-4.86 km/s

Rotational v·sin i

2.40 km/s

Metallicity ratio

[Fe/H]

Distance

528.83 parsec

Light-years 1,724.79 ly

V-band magnitude

13.28 mag

Voyager-speed travel 30,416,749 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.862 mas

Total Proper Motion

16.408 mas/yr

PM Right Ascension

-9.05 mas/yr

PM Declination

-13.69 mas/yr

Galactic Cartesian (pc)

x = -0.618 · y = 0.766 · z = 0.177

Equatorial (J2000)

RA 128.92569° · Dec 10.20659°

Galactic ℓ, b

215.489° · 27.754°

Ecliptic λ, β

128.656° · -8.163°

HTM-20 index

383407461