Key parameters at a glance
- A radius of 18.82 Earth radii
- A mass of 305.12 Earth masses
- Surface gravity around 0.86 g
- An orbital period of 4.909 days
- Semi-major axis 0.0656 AU
- Equilibrium temperature 1,793 K (1520 °C)
- Distance from Earth 3,522.97 light-years
- Earth Similarity Index 0.053
- Travel time at Voyager 1 speed 62,127,644 years
HATS-64 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#49of 1771
top 2.7%
This planet
18.82R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-64 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 18.82 | 11.21 |
| Mass (M⊕) | 1.00 | 305.12 | 317.83 |
| Density (g/cm³) | 5.51 | 0.25 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.86 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,711.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 305.117 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 189625051
Gaia DR2
Gaia DR2 5632704511826797824
Gaia DR3
Gaia DR3 5632704511826797824
System
HATS-64
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.91 Earth days (1.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0656 AU.
Transit Fingerprint
Depth
0.555 %
Duration
5.806 h
Impact parameter b
0.321
Rp / R★
0.081700
Transit midpoint (BJD)
2,457,769.8229
Photometric dip
Transit produces a flux drop of 5,549 ppm lasting ≈ 5.81 h.
Extended Orbital Architecture
Planet / star radius ratio
0.081700
Semi-major axis / stellar radius
6.680
Impact parameter (b)
0.321
RV semi-amplitude (K)
85.000 m/s
Transit mid-time (BJD)
2,457,769.8229
Angular separation (arcsec)
0.06080
Eq. Temperature
1,793K
(1520 °C)
Insolation (S⊕)
1,711.00
Earth = 1.00
Earth Similarity (ESI)
0.053
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
Hartman et al. 2019Instrument
Apogee 4K CCD Sensor
Publication
2019-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at HATSouth (12 shown).
Host System: HATS-64
Spectral Class
F-type yellow-white
Effective Temperature
6,554 K — hotter than the Sun (5,778 K)
Estimated Age
1.86 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.113 R☉
Stellar Mass
1.564 M☉
Metallicity [Fe/H]
0.22
Extended Stellar Properties
Surface gravity (log g)
3.982 dex
Stellar density
0.234 g/cm³
Systemic radial velocity
7.36 km/s
Rotational v·sin i
12.65 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
0.897 mas
Total Proper Motion
3.480 mas/yr
PM Right Ascension
-3.13 mas/yr
PM Declination
-1.53 mas/yr
Galactic Cartesian (pc)
x = -0.705 · y = 0.507 · z = -0.497
Equatorial (J2000)
RA 144.28761° · Dec -29.80044°
Galactic ℓ, b
260.193° · 16.523°
Ecliptic λ, β
159.239° · -41.106°
HTM-20 index
-231334382
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