Temperature
4361 K
3878.3 to 4422
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Stellar HostProfile
HD 240237
K2 III • 933.4 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HIP: HIP 114840TIC: TIC 323919676HD: HD 240237
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: Gettel et al. 2012 • System source: TICv8
Mass
1.69 Msun
0.61 to 8.76
Radius
32 Rsun
0.59 to 83.25
Luminosity
2.49 log(Lsun)
2.49 to 3.09
Distance
933.4 pc
single adopted value
Spectral Type
K2 III
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 32 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 240237
32 R☉
System Layout
Known planets
1 planets linked to this host
HD 240237 b
Radial Velocity
◌
Discovery
2011
Period
745.7 days
Radius
—
Mass
5050.3 M⊕
Eq. Temp
—
HD 240237 and Its Single Known Planet
HD 240237 is a K2 III star located 3040 light-years from Earth. As a giant star, it has evolved off the main sequence. Its mass is 1.69 solar masses, its radius is 32 solar radii, and its surface temperature is 4360 K. The star is therefore more massive and much larger than the Sun, but cooler. One planet orbits it.
HD 240237 b was discovered in 2011 using the radial velocity method, which detects the gravitational wobble a planet induces in its star's motion. The planet's minimum mass - a lower bound on its true mass - is 5050 Earth masses, roughly 15.9 times Jupiter's mass. It completes one orbit every 746 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4422 | 0.61 | 0.59 | 4.42 | — | — | 933.4 | Sousa et al. 2015 | TICv8 |
| 4361.6 | — | 83.25 | — | — | — | 933.4 | TICv8 | TICv8 |
| 4361 | 1.69 | 32 | — | 2.49 | K2 III | 933.4 | Gettel et al. 2012 | TICv8 |
| 3878.3 | — | 78.13 | — | 3.09 | — | 933.4 | Gaia DR2 | TICv8 |
| — | — | — | — | — | K2 | 933.4 | Cannon & Pickering 1918 | TICv8 |
| 3926 | 8.76 | 71.23 | — | — | — | 933.4 | Stassun et al. 2017 | TICv8 |