Key parameters at a glance
- A radius of 1.40 Earth radii
- A mass of 2.54 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 3.152 days
- Equilibrium temperature 624 K (351 °C)
- Distance from Earth 147.07 light-years
- Earth Similarity Index 0.494
- 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 b 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 this | Super-Earth | 1.40 | 2.54 | 3.152 | 624 | 2025 |
| TOI-5489 c | Super-Earth | 1.28 | 2.18 | 4.921 | 536 | 2025 |
TOI-5489 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#923of 1176
top 78.4%
This planet
1.40R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-5489 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.40 | 11.21 |
| Mass (M⊕) | 1.00 | 2.54 | 317.83 |
| Density (g/cm³) | 5.51 | 5.09 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 25.11 | 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 3.15 Earth days (0.9% of a terrestrial year).
Transit Fingerprint
Depth
0.104 %
Duration
1.464 h
Impact parameter b
0.391
Rp / R★
0.030800
Transit midpoint (BJD)
2,458,493.7071
Photometric dip
Transit produces a flux drop of 1,040 ppm lasting ≈ 1.46 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030800
Semi-major axis / stellar radius
16.260
Impact parameter (b)
0.391
Transit mid-time (BJD)
2,458,493.7071
Eq. Temperature
624K
(351 °C)
Insolation (S⊕)
25.11
Earth = 1.00
Earth Similarity (ESI)
0.494
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
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