Key parameters at a glance
- A radius of 11.43 Earth radii
- A mass of 464.99 Earth masses
- Surface gravity around 3.56 g
- An orbital period of 1.651 days
- Semi-major axis 0.0273 AU
- Equilibrium temperature 1,714 K (1441 °C)
- Distance from Earth 650.95 light-years
- Earth Similarity Index 0.088
- Travel time at Voyager 1 speed 11,479,422 years
TOI-564 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1596of 1771
top 90.1%
This planet
11.43R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-564 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.43 | 11.21 |
| Mass (M⊕) | 1.00 | 464.99 | 317.83 |
| Density (g/cm³) | 5.51 | 1.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.56 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,423.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 464.985 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 1003831
Gaia DR2
Gaia DR2 5710154317045164416
Gaia DR3
Gaia DR3 5710154317045164416
System
TOI-564
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.65 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0273 AU.
Transit Fingerprint
Depth
0.920 %
Duration
1.027 h
Impact parameter b
0.994
Rp / R★
0.096000
Transit midpoint (BJD)
2,458,549.5755
Photometric dip
Transit produces a flux drop of 9,200 ppm lasting ≈ 1.03 h.
Extended Orbital Architecture
Planet / star radius ratio
0.096000
Semi-major axis / stellar radius
5.320
Impact parameter (b)
0.994
RV semi-amplitude (K)
247.000 m/s
Transit mid-time (BJD)
2,458,549.5755
Long. of periastron (ω)
94.00°
Angular separation (arcsec)
0.13700
Eq. Temperature
1,714K
(1441 °C)
Insolation (S⊕)
1,423.00
Earth = 1.00
Earth Similarity (ESI)
0.088
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
Davis et al. 2020Instrument
TESS CCD Array
Publication
2020-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-564
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,640 K — cooler than the Sun (5,778 K)
Estimated Age
7.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.088 R☉
Stellar Mass
0.998 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.364 dex
Stellar density
1.095 g/cm³
Systemic radial velocity
7.72 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.982 mas
Total Proper Motion
11.306 mas/yr
PM Right Ascension
-2.51 mas/yr
PM Declination
-11.02 mas/yr
Galactic Cartesian (pc)
x = -0.622 · y = 0.733 · z = -0.276
Equatorial (J2000)
RA 130.29515° · Dec -16.03633°
Galactic ℓ, b
240.629° · 15.554°
Ecliptic λ, β
137.843° · -33.027°
HTM-20 index
1938046148
Similar Worlds
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Radius 11.43 R⊕ · 1,358.3 ly
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