Key parameters at a glance
- A radius of 12.70 Earth radii
- A mass of 2,199.38 Earth masses
- Surface gravity around 13.64 g
- An orbital period of 299.360 days
- Semi-major axis 1.0860 AU
- Distance from Earth 291.17 light-years
- Earth Similarity Index 0.434
- Travel time at Voyager 1 speed 5,134,718 years
Context from the literature
HD 59686 Ab is an exoplanet that orbits the giant star HD 59686 A in a close binary star system. It has a nearly circular orbit with a period of 300 days and a semi-major axis of 1.09 AU, slightly greater than the distance between Earth and the Sun. It has a minimum mass 6.9 times that of Jupiter, with the true mass depending on the orbital inclination, which is not yet known. HD 59686 Ab was discovered by radial velocity and first announced in November 2003, but the discovery was not formally published until 2016.
Excerpted from Wikipedia · full article
HD 59686 A b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1130of 1771
top 63.7%
This planet
12.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 59686 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.70 | 11.21 |
| Mass (M⊕) | 1.00 | 2,199.38 | 317.83 |
| Density (g/cm³) | 5.51 | 5.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 13.64 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 2,199.384 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 59686 A
HIP
HIP 36616
TIC
TIC 247119634
Gaia DR2
Gaia DR2 3169225963647395712
Gaia DR3
Gaia DR3 3169225963647395712
System
HD 59686
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 299.36 Earth days (82.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 1.0860 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.434
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Ortiz et al. 2016Instrument
Hamilton Echelle Spectrograph
Publication
2016-10
Observation locale
Ground
Host System: HD 59686 A
Spectral Class
K-type orange
Effective Temperature
4,658 K — cooler than the Sun (5,778 K)
Estimated Age
1.73 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
13.200 R☉
Stellar Mass
1.900 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
2.490 dex
Systemic radial velocity
-33.55 km/s
Rotational v·sin i
1.03 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
11.174 mas
Total Proper Motion
85.818 mas/yr
PM Right Ascension
39.71 mas/yr
PM Declination
-76.08 mas/yr
Galactic Cartesian (pc)
x = -0.373 · y = 0.880 · z = 0.294
Equatorial (J2000)
RA 112.95186° · Dec 17.08572°
Galactic ℓ, b
201.804° · 16.442°
Ecliptic λ, β
111.956° · -4.621°
HTM-20 index
-907643981
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