Key parameters at a glance
- A radius of 17.60 Earth radii
- A mass of 200.23 Earth masses
- Surface gravity around 0.65 g
- An orbital period of 4.578 days
- Semi-major axis 0.0601 AU
- Equilibrium temperature 1,645 K (1372 °C)
- Distance from Earth 2,865.35 light-years
- Earth Similarity Index 0.058
- Travel time at Voyager 1 speed 50,530,426 years
HATS-39 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#91of 1771
top 5.1%
This planet
17.60R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-39 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 17.60 | 11.21 |
| Mass (M⊕) | 1.00 | 200.23 | 317.83 |
| Density (g/cm³) | 5.51 | 0.20 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.65 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,547.10 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 200.233 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 112604564
Gaia DR2
Gaia DR2 5605481703444311040
Gaia DR3
Gaia DR3 5605481703444311040
System
HATS-39
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.58 Earth days (1.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0601 AU.
Transit Fingerprint
Depth
1.087 %
Duration
3.732 h
Impact parameter b
0.696
Rp / R★
0.099300
Transit midpoint (BJD)
2,457,315.2834
Photometric dip
Transit produces a flux drop of 10,870 ppm lasting ≈ 3.73 h.
Extended Orbital Architecture
Planet / star radius ratio
0.099300
Semi-major axis / stellar radius
7.970
Impact parameter (b)
0.696
RV semi-amplitude (K)
62.000 m/s
Transit mid-time (BJD)
2,457,315.2834
Angular separation (arcsec)
0.06840
Eq. Temperature
1,645K
(1372 °C)
Insolation (S⊕)
1,547.10
Earth = 1.00
Earth Similarity (ESI)
0.058
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
Bento et al. 2018Instrument
Apogee 4K CCD Sensor
Publication
2018-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at HATSouth (12 shown).
Host System: HATS-39
Spectral Class
F-type yellow-white
Effective Temperature
6,572 K — hotter than the Sun (5,778 K)
Estimated Age
2.06 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.621 R☉
Stellar Mass
1.379 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.158 dex
Stellar density
0.457 g/cm³
Systemic radial velocity
2.92 km/s
Rotational v·sin i
7.75 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
1.121 mas
Total Proper Motion
5.689 mas/yr
PM Right Ascension
2.67 mas/yr
PM Declination
-5.02 mas/yr
Galactic Cartesian (pc)
x = -0.330 · y = 0.801 · z = -0.499
Equatorial (J2000)
RA 112.41923° · Dec -29.93792°
Galactic ℓ, b
243.751° · -5.709°
Ecliptic λ, β
121.632° · -50.944°
HTM-20 index
1184770933
Similar Worlds
WASP-172 b
Gas Giant · F-type yellow-white
Radius 17.60 R⊕ · 1,755.1 ly
KELT-18 b
Gas Giant · F-type yellow-white
Radius 17.60 R⊕ · 1,048.2 ly
HAT-P-39 b
Gas Giant · F-type yellow-white
Radius 17.61 R⊕ · 2,273.3 ly
KELT-3 b
Gas Giant · F-type yellow-white
Radius 17.49 R⊕ · 685.7 ly
WASP-167 b
Gas Giant · F-type yellow-white
Radius 17.71 R⊕ · 1,381.4 ly
HATS-40 b
Gas Giant · F-type yellow-white
Radius 17.71 R⊕ · 4,378.0 ly