Key parameters at a glance
- A radius of 13.20 Earth radii
- A mass of 949.67 Earth masses
- Surface gravity around 5.45 g
- An orbital period of 3,549.000 days
- Semi-major axis 4.6070 AU
- Distance from Earth 169.26 light-years
- Earth Similarity Index 0.395
- Travel time at Voyager 1 speed 2,984,870 years
1 sibling around HD 72659
HD 72659 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 72659 b this | Gas Giant | 13.20 | 949.67 | 3,549.000 | — | 2002 |
| HD 72659 c | Gas Giant | 12.10 | 6,165.87 | 35,500.000 | — | 2022 |
HD 72659 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#847of 1771
top 47.8%
This planet
13.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 72659 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.20 | 11.21 |
| Mass (M⊕) | 1.00 | 949.67 | 317.83 |
| Density (g/cm³) | 5.51 | 2.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.45 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 949.671 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 906.129 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 72659
HIP
HIP 42030
TIC
TIC 121284864
Gaia DR2
Gaia DR2 3073443760538892032
Gaia DR3
Gaia DR3 3073443760538892032
System
HD 72659
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 9.72 Earth years on a mildly elliptical path at a mean orbital distance of 4.6070 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
38.230 m/s
Transit mid-time (BJD)
2,457,164.0000
Long. of periastron (ω)
-95.90°
Angular separation (arcsec)
88.80000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.395
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Astrometry
Positional wobble of the host star was measured.
Discovery Paper
Primary reference
Butler et al. 2003Instrument
HIRES Spectrometer
Publication
2003-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2002 at W. M. Keck Observatory (7 shown).
Host System: HD 72659
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,929 K — hotter than the Sun (5,778 K)
Estimated Age
8.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.360 R☉
Stellar Mass
1.033 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.230 dex
Stellar density
0.503 g/cm³
Systemic radial velocity
-18.20 km/s
Rotational v·sin i
1.60 km/s
Activity index (log R'HK)
-5.000
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
19.241 mas
Total Proper Motion
148.306 mas/yr
PM Right Ascension
-112.55 mas/yr
PM Declination
-96.58 mas/yr
Galactic Cartesian (pc)
x = -0.622 · y = 0.782 · z = -0.027
Equatorial (J2000)
RA 128.51281° · Dec -1.56863°
Galactic ℓ, b
226.754° · 21.880°
Ecliptic λ, β
131.368° · -19.648°
HTM-20 index
-1195825973
Observation Record
Photometric series
1
RV measurements
3
Stellar spectra
2
Archive notes
1
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