Key parameters at a glance
- A radius of 10.51 Earth radii
- A mass of 75.96 Earth masses
- Surface gravity around 0.69 g
- An orbital period of 3.671 days
- Semi-major axis 0.0499 AU
- Equilibrium temperature 1,486 K (1213 °C)
- Distance from Earth 810.26 light-years
- Earth Similarity Index 0.083
- Travel time at Voyager 1 speed 14,288,927 years
TOI-1199 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1729of 1771
top 97.6%
This planet
10.51R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1199 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.51 | 11.21 |
| Mass (M⊕) | 1.00 | 75.96 | 317.83 |
| Density (g/cm³) | 5.51 | 0.36 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.69 | 2.53 |
| Insolation (S⊕) | 1.00 | 324.11 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 75.961 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 99869022
Gaia DR2
Gaia DR2 861975270310252416
Gaia DR3
Gaia DR3 861975270310252416
System
TOI-1199
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.67 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0499 AU.
Transit Fingerprint
Depth
0.434 %
Duration
2.149 h
Impact parameter b
0.849
Rp / R★
0.066300
Transit midpoint (BJD)
2,459,420.5376
Photometric dip
Transit produces a flux drop of 4,340 ppm lasting ≈ 2.15 h.
Extended Orbital Architecture
Planet / star radius ratio
0.066300
Impact parameter (b)
0.849
RV semi-amplitude (K)
27.500 m/s
Transit mid-time (BJD)
2,459,420.5376
Long. of periastron (ω)
57.00°
Angular separation (arcsec)
0.20100
Eq. Temperature
1,486K
(1213 °C)
Insolation (S⊕)
324.11
Earth = 1.00
Earth Similarity (ESI)
0.083
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
Serrano Bell et al. 2024Instrument
TESS CCD Array
Publication
2024-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1199
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,710 K — cooler than the Sun (5,778 K)
Estimated Age
4.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.450 R☉
Stellar Mass
1.230 M☉
Metallicity [Fe/H]
0.44
Extended Stellar Properties
Surface gravity (log g)
4.190 dex
Stellar density
0.386 g/cm³
Rotational v·sin i
3.40 km/s
Rotation period
23.00 days
Activity index (log R'HK)
-5.100
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.997 mas
Total Proper Motion
33.591 mas/yr
PM Right Ascension
-4.02 mas/yr
PM Declination
-33.35 mas/yr
Galactic Cartesian (pc)
x = -0.467 · y = 0.109 · z = 0.878
Equatorial (J2000)
RA 166.88066° · Dec 61.35257°
Galactic ℓ, b
142.694° · 51.603°
Ecliptic λ, β
136.121° · 49.631°
HTM-20 index
1204342909
Similar Worlds
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Gas Giant · G-type yellow (Sun-like)
Radius 10.51 R⊕ · 706.2 ly
TOI-7510 d
Gas Giant · G-type yellow (Sun-like)
Radius 10.52 R⊕ · 812.1 ly
TOI-6041 c
Gas Giant · G-type yellow (Sun-like)
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WASP-56 b
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KOI-1257 b
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Kepler-685 b
Gas Giant · G-type yellow (Sun-like)
Radius 10.58 R⊕ · 3,061.7 ly