Key parameters at a glance
- A radius of 2.69 Earth radii
- A mass of 7.71 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 2.426 days
- Semi-major axis 0.0339 AU
- Equilibrium temperature 1,234 K (961 °C)
- Distance from Earth 1,117.43 light-years
- Earth Similarity Index 0.193
- Travel time at Voyager 1 speed 19,705,820 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around TOI-4504
TOI-4504 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-4504 b this | Sub-Neptune | 2.69 | 7.71 | 2.426 | 1,234 | 2024 |
| TOI-4504 d | Gas Giant | 13.60 | 450.24 | 40.563 | — | 2024 |
| TOI-4504 c | Gas Giant | 11.10 | 1,197.32 | 82.972 | 183 | 2024 |
TOI-4504 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#880of 1978
top 44.4%
This planet
2.69R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-4504 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.69 | 11.21 |
| Mass (M⊕) | 1.00 | 7.71 | 317.83 |
| Density (g/cm³) | 5.51 | 2.17 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 548.05 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 349972412
Gaia DR2
Gaia DR2 5289275864525400704
Gaia DR3
Gaia DR3 5289275864525400704
System
TOI-4504
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.43 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0339 AU.
Transit Fingerprint
Depth
0.072 %
Duration
2.134 h
Impact parameter b
0.396
Rp / R★
0.026800
Transit midpoint (BJD)
2,459,038.4580
Photometric dip
Transit produces a flux drop of 718 ppm lasting ≈ 2.13 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026800
Impact parameter (b)
0.396
Transit mid-time (BJD)
2,459,038.4580
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.09900
Eq. Temperature
1,234K
(961 °C)
Insolation (S⊕)
548.05
Earth = 1.00
Earth Similarity (ESI)
0.193
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
V & Iacute Tkov & Aacute et al. 2024Instrument
TESS CCD Array
Publication
2024-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-4504
Spectral Class
K-type orange
Effective Temperature
5,315 K — cooler than the Sun (5,778 K)
Estimated Age
10.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.920 R☉
Stellar Mass
0.890 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.458 dex
Stellar density
1.607 g/cm³
Rotational v·sin i
1.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.890 mas
Total Proper Motion
12.007 mas/yr
PM Right Ascension
-8.66 mas/yr
PM Declination
-8.32 mas/yr
Galactic Cartesian (pc)
x = -0.194 · y = 0.426 · z = -0.884
Equatorial (J2000)
RA 114.46731° · Dec -62.07828°
Galactic ℓ, b
273.986° · -18.605°
Ecliptic λ, β
168.464° · -78.584°
HTM-20 index
892222422
Similar Worlds
Kepler-417 c
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 3,176.7 ly
EPIC 212737443 c
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 1,096.7 ly
K2-268 c
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 1,069.1 ly
TOI-2134 b
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 73.8 ly
TOI-178 d
Sub-Neptune · K-type orange
Radius 2.70 R⊕ · 204.5 ly
Kepler-1539 b
Sub-Neptune · K-type orange
Radius 2.70 R⊕ · 2,440.7 ly