Temperature
5857 K
5697.7 to 5871
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Stellar HostProfile
Kepler-4
Unclassified star • 487.9 pc
Records
17
literature rows
Planets
1
system count
References
18
distinct source labels
TIC: TIC 350814622
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: Borucki et al. 2010 • System source: TICv8
Mass
1.22 Msun
1.03 to 1.22
Radius
1.49 Rsun
1.16 to 1.63
Age
4.50 Gyr
4.50 to 6.76
Luminosity
0.35 log(Lsun)
0.35 to 0.41
Distance
487.9 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.49 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-4
1.49 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-4 b
Transit
◌
Discovery
2009
Period
3.21 days
Radius
4.00 R⊕
Mass
24.47 M⊕
Eq. Temp
1650 K
Kepler-4: A Distant Star With One Known Planet
Kepler-4 is a star 1590 light-years away with one known planet. The host star is 4.5 billion years old and has a mass of 1.22 solar masses, a radius of 1.49 solar radii, and a temperature of 5860 K. Its reported mass and radius estimates are both larger than the Sun's.
The one known planet is Kepler-4 b, a Jupiter-like world discovered by transit in 2009. Its transit reveals an orbital period of 3.21 days. Kepler-4 b has a mass of 24.5 Earth masses and a radius of 4 Earth radii, both larger than Earth's. Its mean density is 2.1 g/cm³, 0.382 times Earth's.
A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. Repeated dips help establish orbital periods. Kepler-4 b's size class compares its radius with Earth's: a Jupiter-like planet exceeds 4 times Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
17
Stellar refs
17
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5858 | — | 1.27 | — | — | — | 487.9 | Batalha et al. 2013 | TICv8 |
| — | — | — | — | — | — | 487.9 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5701 | — | 1.16 | — | — | — | 487.9 | Latham et al. 2005 | TICv8 |
| 5857 | 1.22 | 1.49 | 4.50 | 0.35 | — | 487.9 | Borucki et al. 2010 | TICv8 |
| 5795 | 1.10 | 1.54 | — | — | — | 487.9 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5772 | 1.03 | 1.60 | — | 0.41 | — | 487.9 | TICv8 | TICv8 |
| 5781 | 1.09 | 1.53 | — | — | — | 487.9 | Q1-Q16 KOI Table | TICv8 |
| 5697.7 | — | 1.63 | — | 0.40 | — | 487.9 | Gaia DR2 | TICv8 |
| 5827 | — | 1.53 | — | — | — | 487.9 | Berger et al. 2018 | TICv8 |
| 5858 | 1.12 | 1.27 | 4.70 | — | — | 487.9 | Q1-Q8 KOI Table | TICv8 |
| 5871 | 1.11 | 1.55 | 6.76 | — | — | 487.9 | Morton et al. 2016 | TICv8 |
| 5827 | 1.15 | 1.51 | 6.03 | — | — | 487.9 | Fulton & Petigura 2018 | TICv8 |
| 5772 | — | 1.60 | — | — | — | 487.9 | ExoFOP | TICv8 |
| 5857 | 1.17 | 1.48 | 5.30 | — | — | 487.9 | Southworth 2011 | TICv8 |
| 5781 | 1.09 | 1.53 | — | — | — | 487.9 | Q1-Q12 KOI Table | TICv8 |
| 5781 | 1.09 | 1.53 | — | — | — | 487.9 | Q1-Q17 DR24 KOI Table | TICv8 |
| 5858 | — | 1.27 | — | — | — | 487.9 | Q1-Q6 KOI Table | TICv8 |