Key parameters at a glance
- A radius of 10.30 Earth radii
- A mass of 75.40 Earth masses
- Surface gravity around 0.71 g
- An orbital period of 215.790 days
- Semi-major axis 0.7940 AU
- Distance from Earth 1,301.42 light-years
- Earth Similarity Index 0.300
- Travel time at Voyager 1 speed 22,950,503 years
1 sibling around TOI-1338 A
TOI-1338 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-1338 b | Neptune-like | 7.66 | 11.30 | 95.400 | 255 | 2020 |
| TOI-1338 c this | Gas Giant | 10.30 | 75.40 | 215.790 | — | 2023 |
Circumbinary planet
TOI-1338 c orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.
TOI-1338 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1743of 1771
top 98.4%
This planet
10.30R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1338 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.30 | 11.21 |
| Mass (M⊕) | 1.00 | 75.40 | 317.83 |
| Density (g/cm³) | 5.51 | 0.38 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.71 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 75.400 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 74.372 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 260128333
Gaia DR2
Gaia DR2 5494443978353833088
Gaia DR3
Gaia DR3 5494443978353833088
System
TOI-1338
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 215.79 Earth days (59.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.7940 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
5.600 m/s
Transit mid-time (BJD)
2,459,208.7000
Long. of periastron (ω)
344.64°
Angular separation (arcsec)
1.99000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.300
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Standing et al. 2023Instrument
Multiple Instruments
Publication
2023-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2023 at Multiple Observatories (12 shown).
Host System: TOI-1338 A
Spectral Class
F-type yellow-white
Effective Temperature
5,723 K — cooler than the Sun (5,778 K)
Estimated Age
4.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.313 R☉
Stellar Mass
1.094 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
4.000 dex
Stellar density
0.411 g/cm³
Systemic radial velocity
30.75 km/s
Rotational v·sin i
3.60 km/s
Rotation period
19.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.477 mas
Total Proper Motion
36.523 mas/yr
PM Right Ascension
-12.26 mas/yr
PM Declination
34.40 mas/yr
Galactic Cartesian (pc)
x = -0.019 · y = 0.507 · z = -0.862
Equatorial (J2000)
RA 92.13310° · Dec -59.54099°
Galactic ℓ, b
268.412° · -28.491°
Ecliptic λ, β
98.796° · -82.915°
HTM-20 index
-296798817
Similar Worlds
WASP-195 b
Gas Giant · F-type yellow-white
Radius 10.31 R⊕ · 1,581.4 ly
Kepler-25 d
Gas Giant · F-type yellow-white
Radius 10.00 R⊕ · 793.4 ly
HAT-P-2 b
Gas Giant · F-type yellow-white
Radius 10.66 R⊕ · 416.7 ly
TOI-4214 b
Gas Giant · F-type yellow-white
Radius 10.68 R⊕ · 1,131.4 ly
Kepler-74 b
Gas Giant · F-type yellow-white
Radius 10.76 R⊕ · 3,840.6 ly
WASP-32 b
Gas Giant · F-type yellow-white
Radius 10.76 R⊕ · 900.2 ly