Key parameters at a glance
- A radius of 15.51 Earth radii
- A mass of 4,100.01 Earth masses
- Surface gravity around 17.04 g
- An orbital period of 1.888 days
- Semi-major axis 0.0363 AU
- Equilibrium temperature 2,730 K (2457 °C)
- Distance from Earth 4,758.06 light-years
- Earth Similarity Index 0.049
- Travel time at Voyager 1 speed 83,908,411 years
HATS-70 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#197of 1771
top 11.1%
This planet
15.51R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-70 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.51 | 11.21 |
| Mass (M⊕) | 1.00 | 4,100.01 | 317.83 |
| Density (g/cm³) | 5.51 | 6.64 | 1.33 |
| Surface Gravity (g) | 1.00 | 17.04 | 2.53 |
| Insolation (S⊕) | 1.00 | 9,110.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4,100.007 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 98545929
Gaia DR2
Gaia DR2 5605119586158973440
Gaia DR3
Gaia DR3 5605119586158973440
System
HATS-70
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.89 Earth days (0.5% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0363 AU.
Transit Fingerprint
Depth
0.436 %
Duration
3.624 h
Impact parameter b
0.240
Rp / R★
0.074000
Transit midpoint (BJD)
2,456,911.8749
Photometric dip
Transit produces a flux drop of 4,358 ppm lasting ≈ 3.62 h.
Extended Orbital Architecture
Planet / star radius ratio
0.074000
Semi-major axis / stellar radius
4.170
Impact parameter (b)
0.240
RV semi-amplitude (K)
1,460.000 m/s
Transit mid-time (BJD)
2,456,911.8749
Sky-projected obliquity (λ)
8.90°
True obliquity (ψ)
13.20°
Angular separation (arcsec)
0.02490
Eq. Temperature
2,730K
(2457 °C)
Insolation (S⊕)
9,110.00
Earth = 1.00
Earth Similarity (ESI)
0.049
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
Zhou et al. 2019Instrument
Apogee 4K CCD Sensor
Publication
2019-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2019 at HATSouth (5 shown).
Host System: HATS-70
Spectral Class
A-type white
Effective Temperature
7,930 K — hotter than the Sun (5,778 K)
Estimated Age
0.81 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.881 R☉
Stellar Mass
1.780 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.167 dex
Stellar density
0.315 g/cm³
Systemic radial velocity
35.74 km/s
Rotational v·sin i
40.61 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
0.658 mas
Total Proper Motion
3.437 mas/yr
PM Right Ascension
-2.42 mas/yr
PM Declination
2.44 mas/yr
Galactic Cartesian (pc)
x = -0.280 · y = 0.808 · z = -0.519
Equatorial (J2000)
RA 109.10452° · Dec -31.24439°
Galactic ℓ, b
243.602° · -8.844°
Ecliptic λ, β
117.612° · -52.868°
HTM-20 index
1703575212
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