Key parameters at a glance
- A radius of 13.00 Earth radii
- A mass of 1,207.75 Earth masses
- Surface gravity around 7.15 g
- An orbital period of 5,144.000 days
- Semi-major axis 5.4200 AU
- Distance from Earth 147.21 light-years
- Earth Similarity Index 0.414
- Travel time at Voyager 1 speed 2,596,011 years
HD 166724 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#960of 1771
top 54.2%
This planet
13.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 166724 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.00 | 11.21 |
| Mass (M⊕) | 1.00 | 1,207.75 | 317.83 |
| Density (g/cm³) | 5.51 | 3.02 | 1.33 |
| Surface Gravity (g) | 1.00 | 7.15 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,207.748 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,121.890 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 166724
HIP
HIP 89354
TIC
TIC 87989721
Gaia DR2
Gaia DR2 6724520279784564864
Gaia DR3
Gaia DR3 6724520279784564864
System
HD 166724
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 14.08 Earth years on a highly eccentric trajectory at a mean orbital distance of 5.4200 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.414
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
Marmier et al. 2013Instrument
CORALIE Spectrograph
Publication
2013-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at La Silla Observatory (11 shown).
Host System: HD 166724
Spectral Class
K-type orange
Effective Temperature
5,127 K — cooler than the Sun (5,778 K)
Estimated Age
4.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.797 R☉
Stellar Mass
0.810 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
4.430 dex
Stellar density
2.422 g/cm³
Systemic radial velocity
-17.62 km/s
Rotational v·sin i
1.42 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
22.127 mas
Total Proper Motion
87.906 mas/yr
PM Right Ascension
36.11 mas/yr
PM Declination
-80.15 mas/yr
Galactic Cartesian (pc)
x = 0.045 · y = -0.735 · z = -0.677
Equatorial (J2000)
RA 273.49886° · Dec -42.57572°
Galactic ℓ, b
350.822° · -11.649°
Ecliptic λ, β
272.723° · -19.170°
HTM-20 index
-487301942
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