Key parameters at a glance
- A radius of 3.51 Earth radii
- A mass of 26.00 Earth masses
- Surface gravity around 2.11 g
- An orbital period of 1.195 days
- Semi-major axis 0.0223 AU
- Equilibrium temperature 1,860 K (1587 °C)
- Distance from Earth 847.83 light-years
- Earth Similarity Index 0.118
- Travel time at Voyager 1 speed 14,951,529 years
TOI-2196 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#176of 1978
top 8.8%
This planet
3.51R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-2196 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.51 | 11.21 |
| Mass (M⊕) | 1.00 | 26.00 | 317.83 |
| Density (g/cm³) | 5.51 | 3.31 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,000.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 26.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 372172128
Gaia DR2
Gaia DR2 6375983988633147392
Gaia DR3
Gaia DR3 6375983988633147392
System
TOI-2196
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.19 Earth days (0.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0223 AU.
Transit Fingerprint
Depth
0.113 %
Duration
1.504 h
Impact parameter b
0.712
Rp / R★
0.030800
Transit midpoint (BJD)
2,459,036.5126
Photometric dip
Transit produces a flux drop of 1,127 ppm lasting ≈ 1.50 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030800
Semi-major axis / stellar radius
4.610
Impact parameter (b)
0.712
RV semi-amplitude (K)
15.160 m/s
Transit mid-time (BJD)
2,459,036.5126
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.08590
Eq. Temperature
1,860K
(1587 °C)
Insolation (S⊕)
2,000.00
Earth = 1.00
Earth Similarity (ESI)
0.118
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
Persson et al. 2022Instrument
TESS CCD Array
Publication
2022-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2196
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,634 K — cooler than the Sun (5,778 K)
Estimated Age
4.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.043 R☉
Stellar Mass
1.032 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.420 dex
Stellar density
1.250 g/cm³
Rotational v·sin i
2.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.818 mas
Total Proper Motion
25.822 mas/yr
PM Right Ascension
16.36 mas/yr
PM Declination
-19.98 mas/yr
Galactic Cartesian (pc)
x = 0.225 · y = -0.247 · z = -0.943
Equatorial (J2000)
RA 312.34007° · Dec -70.48507°
Galactic ℓ, b
323.773° · -35.177°
Ecliptic λ, β
290.506° · -50.046°
HTM-20 index
-614317788
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