Key parameters at a glance
- A radius of 11.24 Earth radii
- A mass of 222.00 Earth masses
- Surface gravity around 1.76 g
- An orbital period of 106.145 days
- Semi-major axis 0.4500 AU
- Equilibrium temperature 400 K (127 °C)
- Distance from Earth 511.37 light-years
- Earth Similarity Index 0.356
- Travel time at Voyager 1 speed 9,017,956 years
TOI-2449 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1626of 1771
top 91.8%
This planet
11.24R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2449 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.24 | 11.21 |
| Mass (M⊕) | 1.00 | 222.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.86 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.76 | 2.53 |
| Insolation (S⊕) | 1.00 | 362.64 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 222.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 170729775
Gaia DR2
Gaia DR2 4870809920906672384
Gaia DR3
Gaia DR3 4870809920906672384
System
TOI-2449
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 106.14 Earth days (29.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4500 AU.
Transit Fingerprint
Depth
1.017 %
Duration
8.260 h
Impact parameter b
0.704
Rp / R★
0.096700
Transit midpoint (BJD)
2,459,153.5934
Photometric dip
Transit produces a flux drop of 10,168 ppm lasting ≈ 8.26 h.
Extended Orbital Architecture
Planet / star radius ratio
0.096700
Impact parameter (b)
0.704
RV semi-amplitude (K)
28.800 m/s
Transit mid-time (BJD)
2,459,153.5934
Long. of periastron (ω)
266.00°
Angular separation (arcsec)
2.87000
Eq. Temperature
400K
(127 °C)
Insolation (S⊕)
362.64
Earth = 1.00
Earth Similarity (ESI)
0.356
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Ulmer Moll et al. 2025Instrument
TESS CCD Array
Publication
2025-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2449
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
6,021 K — hotter than the Sun (5,778 K)
Estimated Age
2.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.065 R☉
Stellar Mass
1.079 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.400 dex
Stellar density
1.258 g/cm³
Rotational v·sin i
5.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.349 mas
Total Proper Motion
59.379 mas/yr
PM Right Ascension
10.00 mas/yr
PM Declination
-58.53 mas/yr
Galactic Cartesian (pc)
x = 0.309 · y = 0.764 · z = -0.566
Equatorial (J2000)
RA 67.98437° · Dec -34.45553°
Galactic ℓ, b
236.032° · -42.656°
Ecliptic λ, β
57.015° · -55.402°
HTM-20 index
-1561575131
Similar Worlds
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Radius 11.23 R⊕ · 2,297.6 ly
WASP-34 b
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TIC 279401253 b
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TOI-2338 b
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TOI-2524 b
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Kepler-68 e
Gas Giant · G-type yellow (Sun-like)
Radius 11.20 R⊕ · 470.2 ly