Key parameters at a glance
- A radius of 6.71 Earth radii
- A mass of 36.40 Earth masses
- Surface gravity around 0.81 g
- An orbital period of 83.891 days
- Semi-major axis 0.4230 AU
- Equilibrium temperature 610 K (337 °C)
- Distance from Earth 858.26 light-years
- Earth Similarity Index 0.269
- Travel time at Voyager 1 speed 15,135,471 years
TOI-813 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#224of 574
top 38.9%
This planet
6.71R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-813 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.71 | 11.21 |
| Mass (M⊕) | 1.00 | 36.40 | 317.83 |
| Density (g/cm³) | 5.51 | 0.66 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.81 | 2.53 |
| Insolation (S⊕) | 1.00 | 23.10 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 55525572
Gaia DR2
Gaia DR2 4665704096987467776
Gaia DR3
Gaia DR3 4665704096987467776
System
TOI-813
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 83.89 Earth days (23.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4230 AU.
Transit Fingerprint
Depth
0.122 %
Duration
13.160 h
Impact parameter b
0.300
Rp / R★
0.031650
Transit midpoint (BJD)
2,458,370.7836
Photometric dip
Transit produces a flux drop of 1,218 ppm lasting ≈ 13.16 h.
Extended Orbital Architecture
Planet / star radius ratio
0.031650
Semi-major axis / stellar radius
47.200
Impact parameter (b)
0.300
Transit mid-time (BJD)
2,458,370.7836
Sky-projected obliquity (λ)
-32.00°
Angular separation (arcsec)
1.61000
Eq. Temperature
610K
(337 °C)
Insolation (S⊕)
23.10
Earth = 1.00
Earth Similarity (ESI)
0.269
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Eisner et al. 2020Instrument
TESS CCD Array
Publication
2020-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-813
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,907 K — hotter than the Sun (5,778 K)
Estimated Age
3.73 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.940 R☉
Stellar Mass
1.320 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
3.860 dex
Stellar density
0.254 g/cm³
Systemic radial velocity
1.19 km/s
Rotational v·sin i
8.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
3.771 mas
Total Proper Motion
4.659 mas/yr
PM Right Ascension
-3.73 mas/yr
PM Declination
-2.79 mas/yr
Galactic Cartesian (pc)
x = 0.145 · y = 0.464 · z = -0.874
Equatorial (J2000)
RA 72.69401° · Dec -60.90546°
Galactic ℓ, b
270.681° · -38.018°
Ecliptic λ, β
28.438° · -80.532°
HTM-20 index
1695736452
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