Key parameters at a glance
- A radius of 1.88 Earth radii
- A mass of 3.72 Earth masses
- Surface gravity around 1.05 g
- An orbital period of 39.362 days
- Semi-major axis 0.2130 AU
- Equilibrium temperature 475 K (202 °C)
- Distance from Earth 193.18 light-years
- Earth Similarity Index 0.568
- Travel time at Voyager 1 speed 3,406,728 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-286
TOI-286 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-286 b | Super-Earth | 1.42 | 4.53 | 4.512 | 979 | 2024 |
| TOI-286 c this | Super-Earth | 1.88 | 3.72 | 39.362 | 475 | 2024 |
TOI-286 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#153of 1176
top 12.9%
This planet
1.88R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-286 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.88 | 11.21 |
| Mass (M⊕) | 1.00 | 3.72 | 317.83 |
| Density (g/cm³) | 5.51 | 3.09 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 22.44 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 3.720 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 150030205
Gaia DR2
Gaia DR2 5482316880495405056
Gaia DR3
Gaia DR3 5482316880495405056
System
TOI-286
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 39.36 Earth days (10.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2130 AU.
Transit Fingerprint
Depth
0.055 %
Duration
4.970 h
Impact parameter b
0.320
Transit midpoint (BJD)
2,460,155.0251
Photometric dip
Transit produces a flux drop of 552 ppm lasting ≈ 4.97 h.
Extended Orbital Architecture
Impact parameter (b)
0.320
RV semi-amplitude (K)
0.790 m/s
Transit mid-time (BJD)
2,460,155.0251
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
3.60000
Eq. Temperature
475K
(202 °C)
Insolation (S⊕)
22.44
Earth = 1.00
Earth Similarity (ESI)
0.568
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.
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
Hobson 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-286
Spectral Class
K-type orange
Effective Temperature
5,152 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.780 R☉
Stellar Mass
0.832 M☉
Metallicity [Fe/H]
-0.05
Extended Stellar Properties
Surface gravity (log g)
4.590 dex
Stellar density
2.426 g/cm³
Systemic radial velocity
2.58 km/s
Rotation period
36.00 days
Activity index (log R'HK)
-5.140
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
16.855 mas
Total Proper Motion
76.143 mas/yr
PM Right Ascension
76.06 mas/yr
PM Declination
-3.48 mas/yr
Galactic Cartesian (pc)
x = -0.008 · y = 0.490 · z = -0.872
Equatorial (J2000)
RA 90.98428° · Dec -60.66633°
Galactic ℓ, b
269.635° · -29.159°
Ecliptic λ, β
94.684° · -84.090°
HTM-20 index
2006240596
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