Key parameters at a glance
- A radius of 12.24 Earth radii
- A mass of 1,805.27 Earth masses
- Surface gravity around 12.05 g
- An orbital period of 10.261 days
- Semi-major axis 0.1117 AU
- Equilibrium temperature 1,484 K (1211 °C)
- Distance from Earth 732.97 light-years
- Earth Similarity Index 0.114
- Travel time at Voyager 1 speed 12,925,989 years
TOI-2145 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1397of 1771
top 78.8%
This planet
12.24R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2145 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.24 | 11.21 |
| Mass (M⊕) | 1.00 | 1,805.27 | 317.83 |
| Density (g/cm³) | 5.51 | 5.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 12.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 515.94 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,805.265 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HIP
HIP 86040
TIC
TIC 88992642
Gaia DR2
Gaia DR2 1344163891352965632
Gaia DR3
Gaia DR3 1344163891352965632
System
TOI-2145
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.26 Earth days (2.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1117 AU.
Transit Fingerprint
Depth
0.190 %
Duration
7.468 h
Impact parameter b
0.165
Rp / R★
0.040820
Transit midpoint (BJD)
2,458,982.4966
Photometric dip
Transit produces a flux drop of 1,900 ppm lasting ≈ 7.47 h.
Extended Orbital Architecture
Planet / star radius ratio
0.040820
Semi-major axis / stellar radius
8.740
Impact parameter (b)
0.165
RV semi-amplitude (K)
370.700 m/s
Transit mid-time (BJD)
2,458,982.4966
Long. of periastron (ω)
96.20°
Sky-projected obliquity (λ)
6.80°
Angular separation (arcsec)
0.49700
Eq. Temperature
1,484K
(1211 °C)
Insolation (S⊕)
515.94
Earth = 1.00
Earth Similarity (ESI)
0.114
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
Rodriguez et al. 2023Instrument
TESS CCD Array
Publication
2023-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2145
Spectral Class
F-type yellow-white
Effective Temperature
6,206 K — hotter than the Sun (5,778 K)
Estimated Age
1.60 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.750 R☉
Stellar Mass
1.710 M☉
Metallicity [Fe/H]
0.28
Extended Stellar Properties
Surface gravity (log g)
3.790 dex
Stellar density
0.114 g/cm³
Rotational v·sin i
18.06 km/s
Metallicity ratio
[m/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.421 mas
Total Proper Motion
7.292 mas/yr
PM Right Ascension
-6.51 mas/yr
PM Declination
-3.28 mas/yr
Galactic Cartesian (pc)
x = -0.082 · y = -0.754 · z = 0.652
Equatorial (J2000)
RA 263.75808° · Dec 40.69504°
Galactic ℓ, b
66.039° · 31.207°
Ecliptic λ, β
259.196° · 63.900°
HTM-20 index
1173002118
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