Key parameters at a glance
- A radius of 8.72 Earth radii
- A mass of 120.00 Earth masses
- Surface gravity around 1.58 g
- An orbital period of 2.311 days
- Semi-major axis 0.0340 AU
- Equilibrium temperature 1,264 K (991 °C)
- Distance from Earth 488.15 light-years
- Earth Similarity Index 0.125
- Travel time at Voyager 1 speed 8,608,488 years
TOI-1194 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#103of 574
top 17.8%
This planet
8.72R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-1194 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 8.72 | 11.21 |
| Mass (M⊕) | 1.00 | 120.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.99 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.58 | 2.53 |
| Insolation (S⊕) | 1.00 | 203.69 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 120.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 147950620
Gaia DR2
Gaia DR2 1074139748425931008
Gaia DR3
Gaia DR3 1074139748425931008
System
TOI-1194
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.31 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0340 AU.
Transit Fingerprint
Depth
0.672 %
Duration
1.628 h
Impact parameter b
0.829
Rp / R★
0.083178
Transit midpoint (BJD)
2,458,684.9235
Photometric dip
Transit produces a flux drop of 6,717 ppm lasting ≈ 1.63 h.
Extended Orbital Architecture
Planet / star radius ratio
0.083178
Semi-major axis / stellar radius
7.650
Impact parameter (b)
0.829
RV semi-amplitude (K)
58.400 m/s
Transit mid-time (BJD)
2,458,684.9235
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.22700
Eq. Temperature
1,264K
(991 °C)
Insolation (S⊕)
203.69
Earth = 1.00
Earth Similarity (ESI)
0.125
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
Wang et al. 2023Instrument
TESS CCD Array
Publication
2023-10
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1194
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,394 K — cooler than the Sun (5,778 K)
Estimated Age
4.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.961 R☉
Stellar Mass
0.984 M☉
Metallicity [Fe/H]
0.35
Extended Stellar Properties
Surface gravity (log g)
4.463 dex
Stellar density
1.549 g/cm³
Rotational v·sin i
2.40 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.653 mas
Total Proper Motion
80.970 mas/yr
PM Right Ascension
79.49 mas/yr
PM Declination
15.43 mas/yr
Galactic Cartesian (pc)
x = -0.335 · y = 0.072 · z = 0.939
Equatorial (J2000)
RA 167.82148° · Dec 69.96477°
Galactic ℓ, b
134.723° · 44.801°
Ecliptic λ, β
127.270° · 56.430°
HTM-20 index
1789811882
Similar Worlds
HATS-17 b
Neptune-like · G-type yellow (Sun-like)
Radius 8.71 R⊕ · 1,305.7 ly
Kepler-177 c
Neptune-like · G-type yellow (Sun-like)
Radius 8.73 R⊕ · 4,681.8 ly
K2-329 b
Neptune-like · G-type yellow (Sun-like)
Radius 8.68 R⊕ · 760.7 ly
Kepler-108 b
Neptune-like · G-type yellow (Sun-like)
Radius 8.65 R⊕ · 1,104.8 ly
Kepler-30 d
Neptune-like · G-type yellow (Sun-like)
Radius 8.80 R⊕ · 2,981.8 ly
TOI-2364 b
Neptune-like · G-type yellow (Sun-like)
Radius 8.61 R⊕ · 716.3 ly