Key parameters at a glance
- A radius of 2.07 Earth radii
- A mass of 4.94 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 11.145 days
- Semi-major axis 0.1630 AU
- Equilibrium temperature 584 K (311 °C)
- Distance from Earth 143.29 light-years
- Earth Similarity Index 0.462
- Travel time at Voyager 1 speed 2,526,864 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-262 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1860of 1978
top 94.0%
This planet
2.07R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-262 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.07 | 11.21 |
| Mass (M⊕) | 1.00 | 4.94 | 317.83 |
| Density (g/cm³) | 5.51 | 3.06 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | 56.91 | 0.037 |
Star Catalogue Identifiers
HIP
HIP 10117
TIC
TIC 70513361
Gaia DR2
Gaia DR2 5019835424832215424
Gaia DR3
Gaia DR3 5019835424832215424
System
TOI-262
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.15 Earth days (3.1% of a terrestrial year) at a mean orbital distance of 0.1630 AU.
Transit Fingerprint
Depth
0.048 %
Duration
1.501 h
Impact parameter b
0.719
Rp / R★
0.022000
Transit midpoint (BJD)
2,459,136.5766
Photometric dip
Transit produces a flux drop of 484 ppm lasting ≈ 1.50 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022000
Semi-major axis / stellar radius
41.211
Impact parameter (b)
0.719
Transit mid-time (BJD)
2,459,136.5766
Angular separation (arcsec)
3.71000
Eq. Temperature
584K
(311 °C)
Insolation (S⊕)
56.91
Earth = 1.00
Earth Similarity (ESI)
0.462
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
Oddo et al. 2023Instrument
TESS CCD Array
Publication
2023-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-262
Spectral Class
K-type orange
Effective Temperature
5,310 K — cooler than the Sun (5,778 K)
Estimated Age
0.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.853 R☉
Stellar Mass
0.913 M☉
Metallicity [Fe/H]
0.26
Extended Stellar Properties
Surface gravity (log g)
4.540 dex
Stellar density
2.099 g/cm³
Rotation period
67.00 days
Activity index (log R'HK)
-5.180
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
22.734 mas
Total Proper Motion
297.564 mas/yr
PM Right Ascension
240.04 mas/yr
PM Declination
-175.85 mas/yr
Galactic Cartesian (pc)
x = 0.722 · y = 0.461 · z = -0.516
Equatorial (J2000)
RA 32.53469° · Dec -31.07063°
Galactic ℓ, b
230.545° · -72.388°
Ecliptic λ, β
16.747° · -41.052°
HTM-20 index
-1080647647
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