Temperature
5546 K
5050.3 to 5546
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Stellar HostProfile
KOI-4978
Unclassified star • 936.3 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
TIC: TIC 120962288
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: Fulton & Petigura 2018 • System source: TICv8
Mass
0.97 Msun
0.86 to 0.97
Radius
0.86 Rsun
0.86 to 1.05
Age
1.48 Gyr
single adopted value
Distance
936.3 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.86 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
KOI-4978
0.86 R☉
System Layout
Known planets
1 planets linked to this host
KOI-4978 b
Transit
◌
Discovery
2024
Period
0.94 days
Radius
0.70 R⊕
Mass
—
Eq. Temp
—
KOI-4978 b: A Sub-Earth
KOI-4978 is a Sun-like star 3050 light-years away. Its spectral type is G, and it has one known planet. The star is 1.48 billion years old, has a mass of 0.967 solar masses, a radius of 0.863 solar radii, and a temperature of 5550 K. The star's reported mass, radius, and temperature estimates are smaller or cooler than the Sun's corresponding values.
The planet, KOI-4978 b, was discovered in 2024 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, and KOI-4978 b completes one orbit in 0.942 days. Its radius is 0.7 Earth radii, smaller than Earth's. That places it in the Sub-Earth size class, which compares radius with Earth's: a Sub-Earth is smaller than Earth.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5546 | 0.97 | 0.86 | 1.48 | — | — | 936.3 | Fulton & Petigura 2018 | TICv8 |
| — | — | — | — | — | — | 936.3 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5544 | 0.86 | 0.97 | — | — | — | 936.3 | Q1-Q16 KOI Table | TICv8 |
| 5337 | — | 1.05 | — | — | — | 936.3 | Latham et al. 2005 | TICv8 |
| 5343 | 0.92 | 0.95 | — | -0.18 | — | 936.3 | TICv8 | TICv8 |
| 5050.3 | 0.86 | 0.97 | — | — | G | 936.3 | Wang et al. 2024 | TICv8 |