Key parameters at a glance
- A radius of 1.20 Earth radii
- A mass of 10.70 Earth masses
- Surface gravity around 7.43 g
- An orbital period of 3.965 days
- Semi-major axis 0.0272 AU
- Equilibrium temperature 368 K (95 °C)
- Distance from Earth 83.36 light-years
- Earth Similarity Index 0.656
- Travel time at Voyager 1 speed 1,470,093 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-1080 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#75of 570
top 13.0%
This planet
1.20R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | TOI-1080 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.20 | 11.21 |
| Mass (M⊕) | 1.00 | 10.70 | 317.83 |
| Density (g/cm³) | 5.51 | — | 1.33 |
| Surface Gravity (g) | 1.00 | 7.43 | 2.53 |
| Insolation (S⊕) | 1.00 | 4.35 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 10.700 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 161032923
Gaia DR2
Gaia DR2 6653968157663516672
Gaia DR3
Gaia DR3 6653968157663516672
System
TOI-1080
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.97 Earth days (1.1% of a terrestrial year) at a mean orbital distance of 0.0272 AU.
Transit Fingerprint
Depth
0.368 %
Duration
1.020 h
Impact parameter b
0.380
Rp / R★
0.054800
Transit midpoint (BJD)
2,459,756.4000
Photometric dip
Transit produces a flux drop of 3,681 ppm lasting ≈ 1.02 h.
Extended Orbital Architecture
Planet / star radius ratio
0.054800
Semi-major axis / stellar radius
29.300
Impact parameter (b)
0.380
Transit mid-time (BJD)
2,459,756.4000
Angular separation (arcsec)
1.06000
Eq. Temperature
368K
(95 °C)
Insolation (S⊕)
4.35
Earth = 1.00
Earth Similarity (ESI)
0.656
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
G Oacute Mez Maqueo Chew Dransfield et al. 2026Instrument
TESS CCD Array
Publication
2026-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2026 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1080
Spectral Class
M-type red dwarf
Effective Temperature
3,065 K — cooler than the Sun (5,778 K)
Estimated Age
6.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.202 R☉
Stellar Mass
0.167 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
5.049 dex
Stellar density
29.786 g/cm³
Systemic radial velocity
-78.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
39.097 mas
Total Proper Motion
279.098 mas/yr
PM Right Ascension
-270.29 mas/yr
PM Declination
-69.55 mas/yr
Galactic Cartesian (pc)
x = 0.068 · y = -0.609 · z = -0.790
Equatorial (J2000)
RA 276.36832° · Dec -52.21457°
Galactic ℓ, b
342.568° · -17.381°
Ecliptic λ, β
274.447° · -28.874°
HTM-20 index
-692827472
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