Key parameters at a glance
- A radius of 12.09 Earth radii
- A mass of 835.57 Earth masses
- Surface gravity around 5.71 g
- An orbital period of 1.942 days
- Semi-major axis 0.0266 AU
- Equilibrium temperature 940 K (667 °C)
- Distance from Earth 1,257.95 light-years
- Earth Similarity Index 0.180
- Travel time at Voyager 1 speed 22,183,908 years
- Almost certainly tidally locked to its host star given the close orbit
HATS-76 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1488of 1771
top 84.0%
This planet
12.09R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-76 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.09 | 11.21 |
| Mass (M⊕) | 1.00 | 835.57 | 317.83 |
| Density (g/cm³) | 5.51 | 2.58 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.71 | 2.53 |
| Insolation (S⊕) | 1.00 | 129.80 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 835.571 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 170849515
Gaia DR2
Gaia DR2 4877426575724467456
Gaia DR3
Gaia DR3 4877426575724467456
System
HATS-76
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.94 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0266 AU.
Transit Fingerprint
Depth
3.295 %
Duration
1.858 h
Impact parameter b
0.281
Rp / R★
0.177200
Transit midpoint (BJD)
2,458,424.5556
Photometric dip
Transit produces a flux drop of 32,945 ppm lasting ≈ 1.86 h.
Extended Orbital Architecture
Planet / star radius ratio
0.177200
Semi-major axis / stellar radius
9.120
Impact parameter (b)
0.281
RV semi-amplitude (K)
562.000 m/s
Transit mid-time (BJD)
2,458,424.5556
Angular separation (arcsec)
0.06890
Eq. Temperature
940K
(667 °C)
Insolation (S⊕)
129.80
Earth = 1.00
Earth Similarity (ESI)
0.180
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. 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
Jord Aacute N et al. 2022Instrument
Apogee 4K CCD Sensor
Publication
2022-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2021 at HATSouth (3 shown).
Host System: HATS-76
Spectral Class
K-type orange
Effective Temperature
4,016 K — cooler than the Sun (5,778 K)
Estimated Age
4.60 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.626 R☉
Stellar Mass
0.662 M☉
Metallicity [Fe/H]
0.32
Extended Stellar Properties
Surface gravity (log g)
4.665 dex
Stellar density
3.800 g/cm³
Systemic radial velocity
8.60 km/s
Rotation period
15.16 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.564 mas
Total Proper Motion
38.989 mas/yr
PM Right Ascension
-5.43 mas/yr
PM Declination
-38.61 mas/yr
Galactic Cartesian (pc)
x = 0.284 · y = 0.796 · z = -0.535
Equatorial (J2000)
RA 70.33977° · Dec -32.32042°
Galactic ℓ, b
233.591° · -40.400°
Ecliptic λ, β
61.210° · -53.812°
HTM-20 index
1827950768
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