Key parameters at a glance
- A radius of 19.28 Earth radii
- A mass of 181.16 Earth masses
- Surface gravity around 0.49 g
- An orbital period of 5.004 days
- Semi-major axis 0.0661 AU
- Equilibrium temperature 1,816 K (1543 °C)
- Distance from Earth 1,115.44 light-years
- Earth Similarity Index 0.046
- Travel time at Voyager 1 speed 19,670,849 years
TOI-640 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#41of 1771
top 2.3%
This planet
19.28R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-640 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 19.28 | 11.21 |
| Mass (M⊕) | 1.00 | 181.16 | 317.83 |
| Density (g/cm³) | 5.51 | 0.14 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.49 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,150.12 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 181.162 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 147977348
Gaia DR2
Gaia DR2 5580554052549277056
Gaia DR3
Gaia DR3 5580554052549277056
System
TOI-640
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.00 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0661 AU.
Transit Fingerprint
Depth
0.739 %
Duration
3.696 h
Impact parameter b
0.904
Rp / R★
0.085100
Transit midpoint (BJD)
2,458,459.7413
Photometric dip
Transit produces a flux drop of 7,390 ppm lasting ≈ 3.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.085100
Semi-major axis / stellar radius
6.330
Impact parameter (b)
0.904
RV semi-amplitude (K)
50.100 m/s
Transit mid-time (BJD)
2,458,459.7413
Long. of periastron (ω)
87.00°
Sky-projected obliquity (λ)
184.00°
True obliquity (ψ)
104.00°
Angular separation (arcsec)
0.19300
Eq. Temperature
1,816K
(1543 °C)
Insolation (S⊕)
1,150.12
Earth = 1.00
Earth Similarity (ESI)
0.046
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
Rodriguez et al. 2021Instrument
TESS CCD Array
Publication
2021-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-640
Spectral Class
F-type yellow-white
Effective Temperature
6,460 K — hotter than the Sun (5,778 K)
Estimated Age
1.99 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.082 R☉
Stellar Mass
1.536 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
3.987 dex
Stellar density
0.240 g/cm³
Systemic radial velocity
40.53 km/s
Rotational v·sin i
5.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.895 mas
Total Proper Motion
6.266 mas/yr
PM Right Ascension
-3.87 mas/yr
PM Declination
4.93 mas/yr
Galactic Cartesian (pc)
x = -0.136 · y = 0.791 · z = -0.597
Equatorial (J2000)
RA 99.73459° · Dec -36.64613°
Galactic ℓ, b
245.477° · -18.125°
Ecliptic λ, β
105.529° · -59.562°
HTM-20 index
-140732230
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