Key parameters at a glance
- A radius of 3.30 Earth radii
- A mass of 8.70 Earth masses
- Surface gravity around 0.80 g
- An orbital period of 8.766 days
- Semi-major axis 0.0820 AU
- Equilibrium temperature 993 K (720 °C)
- Distance from Earth 508.12 light-years
- Earth Similarity Index 0.217
- Travel time at Voyager 1 speed 8,960,726 years
TOI-1794 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#285of 1978
top 14.4%
This planet
3.30R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1794 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.30 | 11.21 |
| Mass (M⊕) | 1.00 | 8.70 | 317.83 |
| Density (g/cm³) | 5.51 | 1.31 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.80 | 2.53 |
| Insolation (S⊕) | 1.00 | 228.91 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 8.700 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 286916251
Gaia DR2
Gaia DR2 1552562610862328576
Gaia DR3
Gaia DR3 1552562615159689088
System
TOI-1794
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.77 Earth days (2.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0820 AU.
Transit Fingerprint
Depth
0.057 %
Duration
3.915 h
Impact parameter b
0.494
Rp / R★
0.022966
Transit midpoint (BJD)
2,458,715.3120
Photometric dip
Transit produces a flux drop of 573 ppm lasting ≈ 3.92 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022966
Impact parameter (b)
0.494
RV semi-amplitude (K)
2.800 m/s
Transit mid-time (BJD)
2,458,715.3120
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.52600
Eq. Temperature
993K
(720 °C)
Insolation (S⊕)
228.91
Earth = 1.00
Earth Similarity (ESI)
0.217
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-1794
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,631 K — cooler than the Sun (5,778 K)
Estimated Age
10.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.316 R☉
Stellar Mass
0.970 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.184 dex
Stellar density
0.594 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.390 mas
Total Proper Motion
75.621 mas/yr
PM Right Ascension
-33.03 mas/yr
PM Declination
-68.02 mas/yr
Galactic Cartesian (pc)
x = -0.601 · y = -0.260 · z = 0.755
Equatorial (J2000)
RA 203.39749° · Dec 49.06084°
Galactic ℓ, b
105.366° · 66.605°
Ecliptic λ, β
174.134° · 52.804°
HTM-20 index
591491001
Similar Worlds
Kepler-464 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.30 R⊕ · 2,177.4 ly
Kepler-1467 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.30 R⊕ · 2,781.7 ly
Kepler-610 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.30 R⊕ · 2,758.7 ly
Kepler-1090 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.29 R⊕ · 2,800.9 ly
Kepler-724 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.29 R⊕ · 2,782.5 ly
Kepler-1678 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.30 R⊕ · 2,763.6 ly