Key parameters at a glance
- A radius of 3.27 Earth radii
- A mass of 10.70 Earth masses
- Surface gravity around 1.00 g
- An orbital period of 5.383 days
- Equilibrium temperature 679 K (406 °C)
- Distance from Earth 274.01 light-years
- Earth Similarity Index 0.335
- Travel time at Voyager 1 speed 4,832,204 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-5803 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#295of 1978
top 14.9%
This planet
3.27R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-5803 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.27 | 11.21 |
| Mass (M⊕) | 1.00 | 10.70 | 317.83 |
| Density (g/cm³) | 5.51 | 1.68 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.00 | 2.53 |
| Insolation (S⊕) | 1.00 | 73.72 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 466382581
Gaia DR2
Gaia DR2 2700166125618717696
Gaia DR3
Gaia DR3 2700166125618717696
System
TOI-5803
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.38 Earth days (1.5% of a terrestrial year).
Transit Fingerprint
Depth
0.108 %
Duration
1.382 h
Impact parameter b
0.349
Rp / R★
0.039300
Transit midpoint (BJD)
2,459,802.7103
Photometric dip
Transit produces a flux drop of 1,078 ppm lasting ≈ 1.38 h.
Extended Orbital Architecture
Planet / star radius ratio
0.039300
Semi-major axis / stellar radius
28.596
Impact parameter (b)
0.349
Transit mid-time (BJD)
2,459,802.7103
Eq. Temperature
679K
(406 °C)
Insolation (S⊕)
73.72
Earth = 1.00
Earth Similarity (ESI)
0.335
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.
Discovery Paper
Primary reference
Mistry et al. 2023Instrument
TESS CCD Array
Publication
2023-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-5803
Spectral Class
K-type orange
Effective Temperature
5,134 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.763 R☉
Stellar Mass
0.870 M☉
Metallicity [Fe/H]
—
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
11.875 mas
Total Proper Motion
57.513 mas/yr
PM Right Ascension
43.77 mas/yr
PM Declination
-37.31 mas/yr
Galactic Cartesian (pc)
x = 0.836 · y = -0.538 · z = 0.109
Equatorial (J2000)
RA 327.24875° · Dec 6.27818°
Galactic ℓ, b
63.190° · -34.679°
Ecliptic λ, β
331.710° · 18.315°
HTM-20 index
489177424
Similar Worlds
TOI-2076 d
Sub-Neptune · K-type orange
Radius 3.27 R⊕ · 136.7 ly
Kepler-278 c
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Kepler-411 e
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HD 18143 b
Sub-Neptune · K-type orange
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Kepler-287 c
Sub-Neptune · K-type orange
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K2-348 b
Sub-Neptune · K-type orange
Radius 3.26 R⊕ · 658.4 ly