Key parameters at a glance
- A radius of 14.00 Earth radii
- A mass of 221.21 Earth masses
- Surface gravity around 1.13 g
- An orbital period of 1,862.000 days
- Semi-major axis 2.8070 AU
- Distance from Earth 103.27 light-years
- Earth Similarity Index 0.279
- Travel time at Voyager 1 speed 1,821,203 years
2 siblings around HD 37124
HD 37124 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 37124 b | Gas Giant | 14.00 | 214.54 | 154.378 | — | 2002 |
| HD 37124 c | Gas Giant | 14.10 | 207.23 | 885.500 | — | 2002 |
| HD 37124 d this | Gas Giant | 14.00 | 221.21 | 1,862.000 | — | 2005 |
HD 37124 d Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#415of 1771
top 23.4%
This planet
14.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 37124 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.00 | 11.21 |
| Mass (M⊕) | 1.00 | 221.21 | 317.83 |
| Density (g/cm³) | 5.51 | 0.44 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.13 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 221.210 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 37124
HIP
HIP 26381
TIC
TIC 19631691
Gaia DR2
Gaia DR2 3402798414192387328
Gaia DR3
Gaia DR3 3402798414192387328
System
HD 37124
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 5.10 Earth years on a mildly elliptical path at a mean orbital distance of 2.8070 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
12.800 m/s
Transit mid-time (BJD)
2,454,455.0000
Long. of periastron (ω)
0.00°
Angular separation (arcsec)
88.70000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.279
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Vogt et al. 2005Instrument
HIRES Spectrometer
Publication
2005-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2005 at W. M. Keck Observatory (12 shown).
Host System: HD 37124
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,699 K — cooler than the Sun (5,778 K)
Estimated Age
4.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.949 R☉
Stellar Mass
0.850 M☉
Metallicity [Fe/H]
-0.44
Extended Stellar Properties
Surface gravity (log g)
4.391 dex
Stellar density
1.713 g/cm³
Systemic radial velocity
-22.98 km/s
Rotational v·sin i
1.20 km/s
Activity index (log R'HK)
-4.900
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
31.554 mas
Total Proper Motion
427.636 mas/yr
PM Right Ascension
-79.61 mas/yr
PM Declination
-420.16 mas/yr
Galactic Cartesian (pc)
x = 0.094 · y = 0.931 · z = 0.354
Equatorial (J2000)
RA 84.25999° · Dec 20.72898°
Galactic ℓ, b
185.964° · -5.975°
Ecliptic λ, β
84.623° · -2.603°
HTM-20 index
1372615396
Observation Record
Photometric series
1
RV measurements
3
Stellar spectra
2
Archive notes
1
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