Key parameters at a glance
- A radius of 1.82 Earth radii
- A mass of 3.97 Earth masses
- Surface gravity around 1.20 g
- An orbital period of 7.769 days
- Semi-major axis 0.0632 AU
- Equilibrium temperature 521 K (247 °C)
- Distance from Earth 172.64 light-years
- Earth Similarity Index 0.537
- Travel time at Voyager 1 speed 3,044,568 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-2068 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#234of 1176
top 19.8%
This planet
1.82R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-2068 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.82 | 11.21 |
| Mass (M⊕) | 1.00 | 3.97 | 317.83 |
| Density (g/cm³) | 5.51 | 3.61 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.20 | 2.53 |
| Insolation (S⊕) | 1.00 | 12.23 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 417931300
Gaia DR2
Gaia DR2 1581657479535392256
Gaia DR3
Gaia DR3 1581657479535392256
System
TOI-2068
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.77 Earth days (2.1% of a terrestrial year) at a mean orbital distance of 0.0632 AU.
Transit Fingerprint
Depth
0.097 %
Duration
2.060 h
Impact parameter b
0.460
Rp / R★
0.031000
Transit midpoint (BJD)
2,458,683.4258
Photometric dip
Transit produces a flux drop of 970 ppm lasting ≈ 2.06 h.
Extended Orbital Architecture
Planet / star radius ratio
0.031000
Semi-major axis / stellar radius
26.110
Impact parameter (b)
0.460
Transit mid-time (BJD)
2,458,683.4258
Angular separation (arcsec)
1.19000
Eq. Temperature
521K
(247 °C)
Insolation (S⊕)
12.23
Earth = 1.00
Earth Similarity (ESI)
0.537
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
Mistry et al. 2023Instrument
TESS CCD Array
Publication
2023-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2068
Spectral Class
K-type orange
Effective Temperature
3,710 K — cooler than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.535 R☉
Stellar Mass
0.559 M☉
Metallicity [Fe/H]
0.27
Extended Stellar Properties
Surface gravity (log g)
4.729 dex
Stellar density
5.150 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
18.863 mas
Total Proper Motion
197.977 mas/yr
PM Right Ascension
-197.88 mas/yr
PM Declination
-6.20 mas/yr
Galactic Cartesian (pc)
x = -0.491 · y = -0.054 · z = 0.870
Equatorial (J2000)
RA 186.27356° · Dec 60.41835°
Galactic ℓ, b
128.806° · 56.408°
Ecliptic λ, β
148.860° · 55.020°
HTM-20 index
1446146605
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