Key parameters at a glance
- A radius of 1.28 Earth radii
- A mass of 2.18 Earth masses
- Surface gravity around 1.33 g
- An orbital period of 4.921 days
- Equilibrium temperature 536 K (263 °C)
- Distance from Earth 147.07 light-years
- Earth Similarity Index 0.578
- Travel time at Voyager 1 speed 2,593,509 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-5489
TOI-5489 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-5489 b | Super-Earth | 1.40 | 2.54 | 3.152 | 624 | 2025 |
| TOI-5489 c this | Super-Earth | 1.28 | 2.18 | 4.921 | 536 | 2025 |
TOI-5489 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1117of 1176
top 94.9%
This planet
1.28R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-5489 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.28 | 11.21 |
| Mass (M⊕) | 1.00 | 2.18 | 317.83 |
| Density (g/cm³) | 5.51 | 5.71 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.33 | 2.53 |
| Insolation (S⊕) | 1.00 | 13.87 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 468983280
Gaia DR2
Gaia DR2 602498085299079680
Gaia DR3
Gaia DR3 602498085299079680
System
TOI-5489
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.92 Earth days (1.3% of a terrestrial year).
Transit Fingerprint
Depth
0.088 %
Duration
1.407 h
Impact parameter b
0.449
Rp / R★
0.028100
Transit midpoint (BJD)
2,458,496.3254
Photometric dip
Transit produces a flux drop of 885 ppm lasting ≈ 1.41 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028100
Semi-major axis / stellar radius
21.830
Impact parameter (b)
0.449
Transit mid-time (BJD)
2,458,496.3254
Eq. Temperature
536K
(263 °C)
Insolation (S⊕)
13.87
Earth = 1.00
Earth Similarity (ESI)
0.578
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Gomez Barrientos et al. 2025Instrument
TESS CCD Array
Publication
2025-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-5489
Spectral Class
M-type red dwarf
Effective Temperature
3,547 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.420 R☉
Stellar Mass
0.410 M☉
Metallicity [Fe/H]
—
Extended Stellar Properties
Surface gravity (log g)
4.810 dex
Stellar density
8.019 g/cm³
Systemic radial velocity
37.71 km/s
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
22.149 mas
Total Proper Motion
69.282 mas/yr
PM Right Ascension
-66.12 mas/yr
PM Declination
20.70 mas/yr
Galactic Cartesian (pc)
x = -0.613 · y = 0.765 · z = 0.199
Equatorial (J2000)
RA 128.69129° · Dec 11.48959°
Galactic ℓ, b
214.064° · 28.090°
Ecliptic λ, β
128.106° · -6.979°
HTM-20 index
1054869958
Similar Worlds
Kepler-1124 b
Super-Earth · M-type red dwarf
Radius 1.28 R⊕ · 945.5 ly
TOI-270 b
Super-Earth · M-type red dwarf
Radius 1.28 R⊕ · 73.3 ly
Kepler-235 c
Super-Earth · M-type red dwarf
Radius 1.28 R⊕ · 1,396.0 ly
LHS 3844 b
Super-Earth · M-type red dwarf
Radius 1.29 R⊕ · 48.5 ly
Kepler-1741 b
Super-Earth · M-type red dwarf
Radius 1.27 R⊕ · 883.0 ly
LHS 1140 c
Super-Earth · M-type red dwarf
Radius 1.27 R⊕ · 48.9 ly