Key parameters at a glance
- A radius of 13.23 Earth radii
- A mass of 82.95 Earth masses
- Surface gravity around 0.47 g
- An orbital period of 4.389 days
- Semi-major axis 0.0494 AU
- Equilibrium temperature 1,003 K (730 °C)
- Distance from Earth 1,181.58 light-years
- Earth Similarity Index 0.108
- Travel time at Voyager 1 speed 20,837,076 years
- Almost certainly tidally locked to its host star given the close orbit
HATS-43 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#844of 1771
top 47.6%
This planet
13.23R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-43 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.23 | 11.21 |
| Mass (M⊕) | 1.00 | 82.95 | 317.83 |
| Density (g/cm³) | 5.51 | 0.19 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.47 | 2.53 |
| Insolation (S⊕) | 1.00 | 192.23 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 82.954 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 78055054
Gaia DR2
Gaia DR2 2905983466705521792
Gaia DR3
Gaia DR3 2905983466705521792
System
HATS-43
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.39 Earth days (1.2% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0494 AU.
Transit Fingerprint
Depth
2.496 %
Duration
2.988 h
Impact parameter b
0.172
Rp / R★
0.149200
Transit midpoint (BJD)
2,457,636.0895
Photometric dip
Transit produces a flux drop of 24,965 ppm lasting ≈ 2.99 h.
Extended Orbital Architecture
Planet / star radius ratio
0.149200
Semi-major axis / stellar radius
13.040
Impact parameter (b)
0.172
RV semi-amplitude (K)
37.500 m/s
Transit mid-time (BJD)
2,457,636.0895
Long. of periastron (ω)
330.00°
Angular separation (arcsec)
0.13600
Eq. Temperature
1,003K
(730 °C)
Insolation (S⊕)
192.23
Earth = 1.00
Earth Similarity (ESI)
0.108
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
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
Brahm et al. 2018Instrument
Apogee 4K CCD Sensor
Publication
2018-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at HATSouth (12 shown).
Host System: HATS-43
Spectral Class
K-type orange
Effective Temperature
5,099 K — cooler than the Sun (5,778 K)
Estimated Age
8.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.812 R☉
Stellar Mass
0.837 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.539 dex
Stellar density
2.180 g/cm³
Systemic radial velocity
22.08 km/s
Rotational v·sin i
1.11 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
2.731 mas
Total Proper Motion
9.720 mas/yr
PM Right Ascension
8.70 mas/yr
PM Declination
4.33 mas/yr
Galactic Cartesian (pc)
x = 0.141 · y = 0.846 · z = -0.515
Equatorial (J2000)
RA 80.53824° · Dec -30.97082°
Galactic ℓ, b
234.248° · -31.633°
Ecliptic λ, β
76.136° · -53.956°
HTM-20 index
-55215170
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