Key parameters at a glance
- A radius of 1.52 Earth radii
- A mass of 2.68 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 7.397 days
- Semi-major axis 0.0559 AU
- Equilibrium temperature 458 K (185 °C)
- Distance from Earth 71.86 light-years
- Earth Similarity Index 0.632
- Travel time at Voyager 1 speed 1,267,326 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-244 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#707of 1176
top 60.0%
This planet
1.52R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-244 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.52 | 11.21 |
| Mass (M⊕) | 1.00 | 2.68 | 317.83 |
| Density (g/cm³) | 5.51 | 4.20 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 7.30 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2.680 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 118327550
Gaia DR2
Gaia DR2 5001098681543159040
Gaia DR3
Gaia DR3 5001098681543159040
System
TOI-244
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.40 Earth days (2.0% of a terrestrial year) at a mean orbital distance of 0.0559 AU.
Transit Fingerprint
Depth
0.106 %
Duration
1.700 h
Impact parameter b
0.610
Rp / R★
0.032600
Transit midpoint (BJD)
2,458,357.3627
Photometric dip
Transit produces a flux drop of 1,060 ppm lasting ≈ 1.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032600
Semi-major axis / stellar radius
28.100
Impact parameter (b)
0.610
RV semi-amplitude (K)
1.550 m/s
Transit mid-time (BJD)
2,458,357.3627
Angular separation (arcsec)
2.54000
Eq. Temperature
458K
(185 °C)
Insolation (S⊕)
7.30
Earth = 1.00
Earth Similarity (ESI)
0.632
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
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-244
Spectral Class
M-type red dwarf
Effective Temperature
3,433 K — cooler than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.426 R☉
Stellar Mass
0.428 M☉
Metallicity [Fe/H]
-0.39
Extended Stellar Properties
Surface gravity (log g)
4.660 dex
Stellar density
8.347 g/cm³
Rotation period
53.30 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
45.356 mas
Total Proper Motion
161.703 mas/yr
PM Right Ascension
-155.19 mas/yr
PM Declination
45.44 mas/yr
Galactic Cartesian (pc)
x = 0.788 · y = 0.147 · z = -0.598
Equatorial (J2000)
RA 10.56975° · Dec -36.71797°
Galactic ℓ, b
313.795° · -80.216°
Ecliptic λ, β
352.555° · -37.375°
HTM-20 index
-217189056
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