Key parameters at a glance
- A radius of 2.24 Earth radii
- A mass of 9.60 Earth masses
- Surface gravity around 1.91 g
- An orbital period of 18.841 days
- Semi-major axis 0.1400 AU
- Equilibrium temperature 794 K (521 °C)
- Distance from Earth 336.91 light-years
- Earth Similarity Index 0.342
- Travel time at Voyager 1 speed 5,941,396 years
TOI-1437 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1607of 1978
top 81.2%
This planet
2.24R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1437 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.24 | 11.21 |
| Mass (M⊕) | 1.00 | 9.60 | 317.83 |
| Density (g/cm³) | 5.51 | 3.91 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.91 | 2.53 |
| Insolation (S⊕) | 1.00 | 82.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 9.600 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 198356533
Gaia DR2
Gaia DR2 1433416717674304640
Gaia DR3
Gaia DR3 1433416717674304640
System
TOI-1437
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.84 Earth days (5.2% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1400 AU.
Transit Fingerprint
Depth
0.033 %
Duration
4.650 h
Impact parameter b
0.240
Rp / R★
0.017460
Transit midpoint (BJD)
2,459,360.1652
Photometric dip
Transit produces a flux drop of 331 ppm lasting ≈ 4.65 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017460
Semi-major axis / stellar radius
25.700
Impact parameter (b)
0.240
RV semi-amplitude (K)
2.240 m/s
Transit mid-time (BJD)
2,459,360.1652
Long. of periastron (ω)
-96.30°
Angular separation (arcsec)
1.36000
Eq. Temperature
794K
(521 °C)
Insolation (S⊕)
82.00
Earth = 1.00
Earth Similarity (ESI)
0.342
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Polanski et al. 2024Instrument
TESS CCD Array
Publication
2024-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1437
Spectral Class
F-type yellow-white
Effective Temperature
6,008 K — hotter than the Sun (5,778 K)
Estimated Age
6.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.170 R☉
Stellar Mass
1.100 M☉
Metallicity [Fe/H]
-0.49
Extended Stellar Properties
Surface gravity (log g)
4.260 dex
Stellar density
1.283 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
9.652 mas
Total Proper Motion
22.862 mas/yr
PM Right Ascension
10.71 mas/yr
PM Declination
-20.20 mas/yr
Galactic Cartesian (pc)
x = -0.131 · y = -0.531 · z = 0.837
Equatorial (J2000)
RA 256.13875° · Dec 56.84255°
Galactic ℓ, b
85.269° · 36.914°
Ecliptic λ, β
229.638° · 78.326°
HTM-20 index
335879125
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