Key parameters at a glance
- A radius of 1.99 Earth radii
- A mass of 4.61 Earth masses
- Surface gravity around 1.17 g
- An orbital period of 15.338 days
- Equilibrium temperature 591 K (318 °C)
- Distance from Earth 63.83 light-years
- Earth Similarity Index 0.464
- Travel time at Voyager 1 speed 1,125,683 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-2194 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#23of 1176
top 1.9%
This planet
1.99R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-2194 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.99 | 11.21 |
| Mass (M⊕) | 1.00 | 4.61 | 317.83 |
| Density (g/cm³) | 5.51 | 3.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 14.25 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271478281
Gaia DR2
Gaia DR2 6748283784056800384
Gaia DR3
Gaia DR3 6748283784056800384
System
TOI-2194
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.34 Earth days (4.2% of a terrestrial year).
Transit Fingerprint
Depth
0.068 %
Duration
2.736 h
Impact parameter b
0.412
Rp / R★
0.026300
Transit midpoint (BJD)
2,459,037.3678
Photometric dip
Transit produces a flux drop of 683 ppm lasting ≈ 2.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026300
Semi-major axis / stellar radius
32.393
Impact parameter (b)
0.412
Transit mid-time (BJD)
2,459,037.3678
Eq. Temperature
591K
(318 °C)
Insolation (S⊕)
14.25
Earth = 1.00
Earth Similarity (ESI)
0.464
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-2194
Spectral Class
K-type orange
Effective Temperature
4,756 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.691 R☉
Stellar Mass
0.740 M☉
Metallicity [Fe/H]
-0.37
Extended Stellar Properties
Surface gravity (log g)
4.698 dex
Stellar density
3.163 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
51.067 mas
Total Proper Motion
410.625 mas/yr
PM Right Ascension
409.40 mas/yr
PM Declination
31.71 mas/yr
Galactic Cartesian (pc)
x = 0.416 · y = -0.746 · z = -0.520
Equatorial (J2000)
RA 299.15634° · Dec -31.33518°
Galactic ℓ, b
9.604° · -26.772°
Ecliptic λ, β
295.025° · -10.394°
HTM-20 index
-2125854218
Similar Worlds
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HD 39194 b
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HD 235088 b
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GJ 9827 d
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K2-126 b
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