Key parameters at a glance
- A radius of 10.12 Earth radii
- A mass of 54.98 Earth masses
- Surface gravity around 0.54 g
- An orbital period of 4.742 days
- Semi-major axis 0.0537 AU
- Equilibrium temperature 1,054 K (781 °C)
- Distance from Earth 1,480.12 light-years
- Earth Similarity Index 0.118
- Travel time at Voyager 1 speed 26,101,950 years
HATS-46 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1758of 1771
top 99.2%
This planet
10.12R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HATS-46 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.12 | 11.21 |
| Mass (M⊕) | 1.00 | 54.98 | 317.83 |
| Density (g/cm³) | 5.51 | 0.28 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.54 | 2.53 |
| Insolation (S⊕) | 1.00 | 209.77 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 54.985 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 281541555
Gaia DR2
Gaia DR2 4919771654727611008
Gaia DR3
Gaia DR3 4919771654727611008
System
HATS-46
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.74 Earth days (1.3% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0537 AU.
Transit Fingerprint
Depth
1.265 %
Duration
2.434 h
Impact parameter b
0.634
Rp / R★
0.108800
Transit midpoint (BJD)
2,457,376.6854
Photometric dip
Transit produces a flux drop of 12,651 ppm lasting ≈ 2.43 h.
Extended Orbital Architecture
Planet / star radius ratio
0.108800
Semi-major axis / stellar radius
13.550
Impact parameter (b)
0.634
RV semi-amplitude (K)
22.100 m/s
Transit mid-time (BJD)
2,457,376.6854
Angular separation (arcsec)
0.11800
Eq. Temperature
1,054K
(781 °C)
Insolation (S⊕)
209.77
Earth = 1.00
Earth Similarity (ESI)
0.118
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
Brahm et al. 2018Instrument
Apogee 4K CCD Sensor
Publication
2018-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at HATSouth (12 shown).
Host System: HATS-46
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,495 K — cooler than the Sun (5,778 K)
Estimated Age
3.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.853 R☉
Stellar Mass
0.917 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.542 dex
Stellar density
2.100 g/cm³
Systemic radial velocity
-30.19 km/s
Rotational v·sin i
0.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
2.175 mas
Total Proper Motion
22.673 mas/yr
PM Right Ascension
21.46 mas/yr
PM Declination
7.32 mas/yr
Galactic Cartesian (pc)
x = 0.551 · y = 0.065 · z = -0.832
Equatorial (J2000)
RA 6.70264° · Dec -56.31610°
Galactic ℓ, b
309.865° · -60.479°
Ecliptic λ, β
333.749° · -52.110°
HTM-20 index
-576430032
Similar Worlds
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Gas Giant · G-type yellow (Sun-like)
Radius 10.12 R⊕ · 1,085.0 ly
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HATS-5 b
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TOI-1386 c
Gas Giant · G-type yellow (Sun-like)
Radius 10.30 R⊕ · 479.0 ly