Key parameters at a glance
- A radius of 11.55 Earth radii
- A mass of 147.15 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 1.265 days
- Semi-major axis 0.0159 AU
- Equilibrium temperature 687 K (414 °C)
- Distance from Earth 376.90 light-years
- Earth Similarity Index 0.203
- Travel time at Voyager 1 speed 6,646,562 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-519 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1587of 1771
top 89.6%
This planet
11.55R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-519 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.55 | 11.21 |
| Mass (M⊕) | 1.00 | 147.15 | 317.83 |
| Density (g/cm³) | 5.51 | 0.56 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 54.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 147.155 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 218795833
Gaia DR2
Gaia DR2 5707485527450614656
Gaia DR3
Gaia DR3 5707485527450614656
System
TOI-519
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.27 Earth days (0.3% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0159 AU.
Transit Fingerprint
Depth
11.022 %
Duration
1.236 h
Impact parameter b
0.313
Rp / R★
0.304000
Transit midpoint (BJD)
2,459,013.1530
Photometric dip
Transit produces a flux drop of 110,216 ppm lasting ≈ 1.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.304000
Semi-major axis / stellar radius
9.901
Impact parameter (b)
0.313
RV semi-amplitude (K)
182.000 m/s
Transit mid-time (BJD)
2,459,013.1530
Angular separation (arcsec)
0.13800
Eq. Temperature
687K
(414 °C)
Insolation (S⊕)
54.00
Earth = 1.00
Earth Similarity (ESI)
0.203
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Parviainen et al. 2021Instrument
TESS CCD Array
Publication
2021-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-519
Spectral Class
M-type red dwarf
Effective Temperature
3,322 K — cooler than the Sun (5,778 K)
Estimated Age
5.40 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.350 R☉
Stellar Mass
0.335 M☉
Metallicity [Fe/H]
0.27
Extended Stellar Properties
Surface gravity (log g)
4.870 dex
Stellar density
11.450 g/cm³
Systemic radial velocity
26.89 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
8.626 mas
Total Proper Motion
51.087 mas/yr
PM Right Ascension
-41.99 mas/yr
PM Declination
29.10 mas/yr
Galactic Cartesian (pc)
x = -0.535 · y = 0.775 · z = -0.336
Equatorial (J2000)
RA 124.60676° · Dec -19.66279°
Galactic ℓ, b
240.599° · 9.038°
Ecliptic λ, β
132.810° · -38.099°
HTM-20 index
1754077315
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