Temperature
5225 K
5091 to 5229
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Stellar HostProfile
TOI-444
K1/2 V • 57.40 pc
Records
3
literature rows
Planets
1
system count
References
4
distinct source labels
HIP: HIP 19950TIC: TIC 179034327
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Oddo et al. 2023 • System source: TICv8
Mass
0.96 Msun
0.85 to 0.96
Radius
0.78 Rsun
0.78 to 0.79
Age
0.57 Gyr
single adopted value
Distance
57.40 pc
single adopted value
Spectral Type
K1/2 V
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.78 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
TOI-444
0.78 R☉
System Layout
Known planets
1 planets linked to this host
TOI-444 b
Transit
◌
Discovery
2023
Period
17.96 days
Radius
2.77 R⊕
Mass
—
Eq. Temp
609 K
TOI-444 b: A Neptune-like World Orbiting a K-type Dwarf
TOI-444 is a K1/2 V star located 187 light-years away. This stellar class is cooler and redder than the Sun. The star has a mass of 0.96 solar masses, a radius of 0.779 solar radii, and a temperature of 5230 K. Its age is 0.57 billion years. The reported radius estimate is smaller than the Sun's, and its temperature is cooler than the Sun's. One planet is known to orbit this host.
TOI-444 b is a Neptune-like planet discovered in 2023 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. Repeated dips help establish orbital periods. The planet completes one orbit every 18 days, and its radius is 2.77 Earth radii - larger than Earth's. Its size class compares radius with Earth's: a Neptune-like planet reaches 4 times Earth's radius, so TOI-444 b falls within that range, though the classification describes radius rather than composition.
No orbital period is reported for any additional planet, and no further measurements are available for TOI-444 b beyond its period and radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
3
Stellar refs
3
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositystable
Surface Gravitydisputed
Metallicitystable
Spectral Typestable