Key parameters at a glance
- A radius of 1.64 Earth radii
- A mass of 4.00 Earth masses
- Surface gravity around 1.48 g
- An orbital period of 7.095 days
- Semi-major axis 0.0725 AU
- Equilibrium temperature 923 K (650 °C)
- Distance from Earth 202.63 light-years
- Earth Similarity Index 0.312
- Travel time at Voyager 1 speed 3,573,419 years
TOI-1799 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#494of 1176
top 41.9%
This planet
1.64R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-1799 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.64 | 11.21 |
| Mass (M⊕) | 1.00 | 4.00 | 317.83 |
| Density (g/cm³) | 5.51 | 7.51 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.48 | 2.53 |
| Insolation (S⊕) | 1.00 | 164.26 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HIP
HIP 54491
TIC
TIC 8967242
Gaia DR2
Gaia DR2 761300339243646848
Gaia DR3
Gaia DR3 761300339243646848
System
TOI-1799
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.09 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0725 AU.
Transit Fingerprint
Depth
0.028 %
Duration
2.570 h
Impact parameter b
0.372
Rp / R★
0.015700
Transit midpoint (BJD)
2,458,904.8176
Photometric dip
Transit produces a flux drop of 284 ppm lasting ≈ 2.57 h.
Extended Orbital Architecture
Planet / star radius ratio
0.015700
Impact parameter (b)
0.372
RV semi-amplitude (K)
1.400 m/s
Transit mid-time (BJD)
2,458,904.8176
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
1.17000
Eq. Temperature
923K
(650 °C)
Insolation (S⊕)
164.26
Earth = 1.00
Earth Similarity (ESI)
0.312
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
Polanski et al. 2024Instrument
TESS CCD Array
Publication
2024-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1799
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,690 K — cooler than the Sun (5,778 K)
Estimated Age
5.10 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.957 R☉
Stellar Mass
1.010 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.450 dex
Stellar density
1.517 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
16.067 mas
Total Proper Motion
41.822 mas/yr
PM Right Ascension
-9.03 mas/yr
PM Declination
-40.83 mas/yr
Galactic Cartesian (pc)
x = -0.806 · y = 0.183 · z = 0.564
Equatorial (J2000)
RA 167.23292° · Dec 34.30301°
Galactic ℓ, b
188.548° · 66.904°
Ecliptic λ, β
154.070° · 26.388°
HTM-20 index
718268814
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