Key parameters at a glance
- A radius of 18.11 Earth radii
- A mass of 309.88 Earth masses
- Surface gravity around 0.94 g
- An orbital period of 1.962 days
- Semi-major axis 0.0319 AU
- Equilibrium temperature 1,893 K (1620 °C)
- Distance from Earth 1,613.88 light-years
- Earth Similarity Index 0.052
- Travel time at Voyager 1 speed 28,460,747 years
TOI-2803 A b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#67of 1771
top 3.7%
This planet
18.11R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2803 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 18.11 | 11.21 |
| Mass (M⊕) | 1.00 | 309.88 | 317.83 |
| Density (g/cm³) | 5.51 | 0.29 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.94 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,150.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 309.883 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 124379043
Gaia DR2
Gaia DR2 2913482170369046656
Gaia DR3
Gaia DR3 2913482170369046656
System
TOI-2803
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.96 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0319 AU.
Transit Fingerprint
Depth
1.781 %
Duration
3.091 h
Impact parameter b
0.097
Transit midpoint (BJD)
2,459,207.6864
Photometric dip
Transit produces a flux drop of 17,810 ppm lasting ≈ 3.09 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
5.512
Impact parameter (b)
0.097
RV semi-amplitude (K)
146.700 m/s
Transit mid-time (BJD)
2,459,207.6864
Angular separation (arcsec)
0.06440
Eq. Temperature
1,893K
(1620 °C)
Insolation (S⊕)
2,150.00
Earth = 1.00
Earth Similarity (ESI)
0.052
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
Yee et al. 2023Instrument
TESS CCD Array
Publication
2023-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2803 A
Spectral Class
F-type yellow-white
Effective Temperature
6,280 K — hotter than the Sun (5,778 K)
Estimated Age
3.70 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.245 R☉
Stellar Mass
1.118 M☉
Metallicity [Fe/H]
-0.11
Extended Stellar Properties
Surface gravity (log g)
4.298 dex
Stellar density
0.822 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.992 mas
Total Proper Motion
11.903 mas/yr
PM Right Ascension
0.79 mas/yr
PM Declination
11.88 mas/yr
Galactic Cartesian (pc)
x = -0.050 · y = 0.916 · z = -0.399
Equatorial (J2000)
RA 93.11474° · Dec -23.49250°
Galactic ℓ, b
230.374° · -18.658°
Ecliptic λ, β
94.177° · -46.887°
HTM-20 index
-758334739
Similar Worlds
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Gas Giant · F-type yellow-white
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Radius 18.27 R⊕ · 1,521.3 ly