Key parameters at a glance
- A radius of 11.19 Earth radii
- A mass of 101.39 Earth masses
- Surface gravity around 0.81 g
- An orbital period of 3.325 days
- Semi-major axis 0.0362 AU
- Equilibrium temperature 713 K (440 °C)
- Distance from Earth 552.24 light-years
- Earth Similarity Index 0.185
- Travel time at Voyager 1 speed 9,738,766 years
- Almost certainly tidally locked to its host star given the close orbit
HATS-6 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1641of 1771
top 92.6%
This planet
11.19R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-6 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.19 | 11.21 |
| Mass (M⊕) | 1.00 | 101.39 | 317.83 |
| Density (g/cm³) | 5.51 | 0.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.81 | 2.53 |
| Insolation (S⊕) | 1.00 | 47.33 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 101.388 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 33521996
Gaia DR2
Gaia DR2 2966680597368750720
Gaia DR3
Gaia DR3 2966680597368750720
System
HATS-6
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.33 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0362 AU.
Transit Fingerprint
Depth
3.230 %
Duration
2.041 h
Impact parameter b
0.427
Rp / R★
0.179780
Transit midpoint (BJD)
2,456,643.7406
Photometric dip
Transit produces a flux drop of 32,300 ppm lasting ≈ 2.04 h.
Extended Orbital Architecture
Planet / star radius ratio
0.179780
Semi-major axis / stellar radius
13.650
Impact parameter (b)
0.427
RV semi-amplitude (K)
63.000 m/s
Transit mid-time (BJD)
2,456,643.7406
Angular separation (arcsec)
0.21400
Eq. Temperature
713K
(440 °C)
Insolation (S⊕)
47.33
Earth = 1.00
Earth Similarity (ESI)
0.185
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
Hartman et al. 2015Instrument
Apogee 4K CCD Sensor
Publication
2015-05
Observation locale
Ground
Discovery cohort
Planets confirmed in 2015 at HATSouth (6 shown).
Host System: HATS-6
Spectral Class
M-type red dwarf
Effective Temperature
3,724 K — cooler than the Sun (5,778 K)
Estimated Age
8.10 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.570 R☉
Stellar Mass
0.574 M☉
Metallicity [Fe/H]
0.20
Extended Stellar Properties
Surface gravity (log g)
4.683 dex
Stellar density
4.360 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.877 mas
Total Proper Motion
7.773 mas/yr
PM Right Ascension
-2.53 mas/yr
PM Declination
7.35 mas/yr
Galactic Cartesian (pc)
x = 0.031 · y = 0.945 · z = -0.326
Equatorial (J2000)
RA 88.14681° · Dec -19.03163°
Galactic ℓ, b
224.114° · -21.246°
Ecliptic λ, β
87.621° · -42.456°
HTM-20 index
-24776784
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