Key parameters at a glance
- A radius of 12.62 Earth radii
- A mass of 256.17 Earth masses
- Surface gravity around 1.61 g
- An orbital period of 5.416 days
- Semi-major axis 0.0611 AU
- Equilibrium temperature 1,128 K (855 °C)
- Distance from Earth 2,096.80 light-years
- Earth Similarity Index 0.122
- Travel time at Voyager 1 speed 36,977,150 years
1 sibling around HATS-59
HATS-59 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HATS-59 b this | Gas Giant | 12.62 | 256.17 | 5.416 | 1,128 | 2018 |
| HATS-59 c | Gas Giant | 12.30 | 4,036.44 | 1,422.000 | 176 | 2018 |
HATS-59 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1178of 1771
top 66.5%
This planet
12.62R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-59 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.62 | 11.21 |
| Mass (M⊕) | 1.00 | 256.17 | 317.83 |
| Density (g/cm³) | 5.51 | 0.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.61 | 2.53 |
| Insolation (S⊕) | 1.00 | 269.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 256.171 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 437261733
Gaia DR2
Gaia DR2 3538256769264276480
Gaia DR3
Gaia DR3 3538256769264276480
System
HATS-59
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.42 Earth days (1.5% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0611 AU.
Transit Fingerprint
Depth
1.431 %
Duration
3.593 h
Impact parameter b
0.457
Rp / R★
0.111600
Transit midpoint (BJD)
2,456,620.6653
Photometric dip
Transit produces a flux drop of 14,310 ppm lasting ≈ 3.59 h.
Extended Orbital Architecture
Planet / star radius ratio
0.111600
Semi-major axis / stellar radius
12.660
Impact parameter (b)
0.457
RV semi-amplitude (K)
92.100 m/s
Transit mid-time (BJD)
2,456,620.6653
Long. of periastron (ω)
227.00°
Angular separation (arcsec)
0.09510
Eq. Temperature
1,128K
(855 °C)
Insolation (S⊕)
269.00
Earth = 1.00
Earth Similarity (ESI)
0.122
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
Sarkis et al. 2018Instrument
Apogee 4K CCD Sensor
Publication
2018-11
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at HATSouth (12 shown).
Host System: HATS-59
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,670 K — cooler than the Sun (5,778 K)
Estimated Age
4.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.036 R☉
Stellar Mass
1.038 M☉
Metallicity [Fe/H]
0.18
Extended Stellar Properties
Surface gravity (log g)
4.422 dex
Stellar density
1.310 g/cm³
Systemic radial velocity
-10.89 km/s
Rotational v·sin i
2.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
1.527 mas
Total Proper Motion
24.184 mas/yr
PM Right Ascension
-24.17 mas/yr
PM Declination
0.93 mas/yr
Galactic Cartesian (pc)
x = -0.911 · y = 0.155 · z = -0.381
Equatorial (J2000)
RA 170.32433° · Dec -22.38818°
Galactic ℓ, b
276.989° · 35.902°
Ecliptic λ, β
180.557° · -24.284°
HTM-20 index
1753159107
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