Key parameters at a glance
- A radius of 21.05 Earth radii
- A mass of 581.63 Earth masses
- Surface gravity around 1.31 g
- An orbital period of 1.903 days
- Semi-major axis 0.0371 AU
- Equilibrium temperature 2,546 K (2273 °C)
- Distance from Earth 736.75 light-years
- Earth Similarity Index 0.036
- Travel time at Voyager 1 speed 12,992,537 years
TOI-1518 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#22of 1771
top 1.2%
This planet
21.05R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1518 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 21.05 | 11.21 |
| Mass (M⊕) | 1.00 | 581.63 | 317.83 |
| Density (g/cm³) | 5.51 | 0.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.31 | 2.53 |
| Insolation (S⊕) | 1.00 | 7,010.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 581.626 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 427761355
Gaia DR2
Gaia DR2 2210596444367488384
Gaia DR3
Gaia DR3 2210596444367488384
System
TOI-1518
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.90 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0371 AU.
Transit Fingerprint
Depth
0.988 %
Duration
2.395 h
Impact parameter b
0.881
Rp / R★
0.099390
Transit midpoint (BJD)
2,459,983.7919
Photometric dip
Transit produces a flux drop of 9,880 ppm lasting ≈ 2.40 h.
Extended Orbital Architecture
Planet / star radius ratio
0.099390
Semi-major axis / stellar radius
4.109
Impact parameter (b)
0.881
RV semi-amplitude (K)
192.000 m/s
Occultation depth
0.036 ppm
Transit mid-time (BJD)
2,459,983.7919
Angular separation (arcsec)
0.16400
Eq. Temperature
2,546K
(2273 °C)
Insolation (S⊕)
7,010.00
Earth = 1.00
Earth Similarity (ESI)
0.036
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.
Orbital-brightness modulation
Host star brightness varies with the planet's orbit.
Discovery Paper
Primary reference
Cabot et al. 2021Instrument
Multiple Instruments
Publication
2021-11
Observation locale
Multiple Locales
Discovery cohort
Planets confirmed in 2021 at Multiple Observatories (12 shown).
Host System: TOI-1518
Spectral Class
F-type yellow-white
Effective Temperature
7,299 K — hotter than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
1.942 R☉
Stellar Mass
1.880 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.136 dex
Stellar density
0.362 g/cm³
Systemic radial velocity
-13.94 km/s
Rotational v·sin i
85.10 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.398 mas
Total Proper Motion
8.903 mas/yr
PM Right Ascension
-7.44 mas/yr
PM Declination
-4.88 mas/yr
Galactic Cartesian (pc)
x = 0.387 · y = -0.052 · z = 0.921
Equatorial (J2000)
RA 352.26752° · Dec 67.03481°
Galactic ℓ, b
115.009° · 5.439°
Ecliptic λ, β
39.441° · 59.957°
HTM-20 index
-799012486
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