Key parameters at a glance
- A radius of 1.42 Earth radii
- A mass of 3.58 Earth masses
- Surface gravity around 1.78 g
- An orbital period of 0.470 days
- Semi-major axis 0.0116 AU
- Equilibrium temperature 2,130 K (1857 °C)
- Distance from Earth 409.21 light-years
- Earth Similarity Index 0.122
- Travel time at Voyager 1 speed 7,216,332 years
TOI-1444 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#898of 1176
top 76.3%
This planet
1.42R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-1444 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.42 | 11.21 |
| Mass (M⊕) | 1.00 | 3.58 | 317.83 |
| Density (g/cm³) | 5.51 | 6.84 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.78 | 2.53 |
| Insolation (S⊕) | 1.00 | 5,028.63 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 3.580 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 258514800
Gaia DR2
Gaia DR2 2274696151198328960
Gaia DR3
Gaia DR3 2274696151198328960
System
TOI-1444
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 11.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0116 AU.
Transit Fingerprint
Depth
0.021 %
Duration
1.283 h
Impact parameter b
0.333
Rp / R★
0.014277
Transit midpoint (BJD)
2,458,711.3675
Photometric dip
Transit produces a flux drop of 210 ppm lasting ≈ 1.28 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014277
Semi-major axis / stellar radius
2.730
Impact parameter (b)
0.333
RV semi-amplitude (K)
3.020 m/s
Transit mid-time (BJD)
2,458,711.3675
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.09250
Eq. Temperature
2,130K
(1857 °C)
Insolation (S⊕)
5,028.63
Earth = 1.00
Earth Similarity (ESI)
0.122
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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
Dai et al. 2021Instrument
TESS CCD Array
Publication
2021-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1444
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,460 K — cooler than the Sun (5,778 K)
Estimated Age
3.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.911 R☉
Stellar Mass
0.951 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.496 dex
Stellar density
1.762 g/cm³
Rotational v·sin i
2.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
7.942 mas
Total Proper Motion
50.805 mas/yr
PM Right Ascension
46.40 mas/yr
PM Declination
-20.69 mas/yr
Galactic Cartesian (pc)
x = 0.189 · y = -0.266 · z = 0.945
Equatorial (J2000)
RA 305.47493° · Dec 70.94371°
Galactic ℓ, b
104.388° · 18.618°
Ecliptic λ, β
34.865° · 76.647°
HTM-20 index
-1775464025
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