Key parameters at a glance
- A radius of 16.81 Earth radii
- A mass of 168.45 Earth masses
- Surface gravity around 0.60 g
- An orbital period of 4.637 days
- Semi-major axis 0.0611 AU
- Equilibrium temperature 1,659 K (1386 °C)
- Distance from Earth 2,664.66 light-years
- Earth Similarity Index 0.056
- Travel time at Voyager 1 speed 46,991,195 years
HATS-27 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#116of 1771
top 6.5%
This planet
16.81R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-27 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.81 | 11.21 |
| Mass (M⊕) | 1.00 | 168.45 | 317.83 |
| Density (g/cm³) | 5.51 | 0.18 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.60 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,342.57 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 168.450 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 248111245
Gaia DR2
Gaia DR2 6134228079203074176
Gaia DR3
Gaia DR3 6134228079203074176
System
HATS-27
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.64 Earth days (1.3% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0611 AU.
Transit Fingerprint
Depth
0.777 %
Duration
4.831 h
Impact parameter b
0.360
Rp / R★
0.089500
Transit midpoint (BJD)
2,457,029.3374
Photometric dip
Transit produces a flux drop of 7,766 ppm lasting ≈ 4.83 h.
Extended Orbital Architecture
Planet / star radius ratio
0.089500
Semi-major axis / stellar radius
7.550
Impact parameter (b)
0.360
RV semi-amplitude (K)
51.000 m/s
Transit mid-time (BJD)
2,457,029.3374
Angular separation (arcsec)
0.07480
Eq. Temperature
1,659K
(1386 °C)
Insolation (S⊕)
1,342.57
Earth = 1.00
Earth Similarity (ESI)
0.056
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
Espinoza et al. 2016Instrument
Apogee 4K CCD Sensor
Publication
2016-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2016 at HATSouth (12 shown).
Host System: HATS-27
Spectral Class
F-type yellow-white
Effective Temperature
6,438 K — hotter than the Sun (5,778 K)
Estimated Age
2.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.740 R☉
Stellar Mass
1.415 M☉
Metallicity [Fe/H]
0.09
Extended Stellar Properties
Surface gravity (log g)
4.107 dex
Stellar density
0.379 g/cm³
Systemic radial velocity
-3.58 km/s
Rotational v·sin i
9.32 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
1.198 mas
Total Proper Motion
13.604 mas/yr
PM Right Ascension
-13.59 mas/yr
PM Declination
0.55 mas/yr
Galactic Cartesian (pc)
x = -0.668 · y = -0.161 · z = -0.726
Equatorial (J2000)
RA 193.55246° · Dec -46.58772°
Galactic ℓ, b
303.428° · 16.281°
Ecliptic λ, β
213.167° · -37.044°
HTM-20 index
-1071658447
Similar Worlds
WASP-168 b
Gas Giant · F-type yellow-white
Radius 16.81 R⊕ · 991.3 ly
TOI-4329 b
Gas Giant · F-type yellow-white
Radius 16.81 R⊕ · 2,339.0 ly
WASP-136 b
Gas Giant · F-type yellow-white
Radius 16.81 R⊕ · 898.8 ly
HATS-65 b
Gas Giant · F-type yellow-white
Radius 16.82 R⊕ · 1,609.0 ly
WASP-176 b
Gas Giant · F-type yellow-white
Radius 16.87 R⊕ · 1,853.9 ly
HAT-P-56 b
Gas Giant · F-type yellow-white
Radius 16.93 R⊕ · 1,045.8 ly