Key parameters at a glance
- A radius of 13.30 Earth radii
- A mass of 116.00 Earth masses
- Surface gravity around 0.66 g
- An orbital period of 1,207.000 days
- Semi-major axis 2.1600 AU
- Equilibrium temperature 159 K (-114 °C)
- Distance from Earth 71.76 light-years
- Earth Similarity Index 0.222
- Travel time at Voyager 1 speed 1,265,479 years
3 siblings around HD 164922
HD 164922 b shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 164922 d | Super-Earth | 1.83 | 4.00 | 12.458 | — | 2020 |
| HD 164922 e | Sub-Neptune | 3.23 | 10.52 | 41.763 | — | 2021 |
| HD 164922 c | Sub-Neptune | 3.66 | 13.00 | 75.740 | 401 | 2016 |
| HD 164922 b this | Gas Giant | 13.30 | 116.00 | 1,207.000 | 159 | 2005 |
HD 164922 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#793of 1771
top 44.7%
This planet
13.30R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 164922 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.30 | 11.21 |
| Mass (M⊕) | 1.00 | 116.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.66 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.16 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 116.000 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 164922
HIP
HIP 88348
TIC
TIC 159019691
Gaia DR2
Gaia DR2 4582680493669880704
Gaia DR3
Gaia DR3 4582680493669880704
System
HD 164922
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 3.30 Earth years on a nearly circular orbit at a mean orbital distance of 2.1600 AU.
Extended Orbital Architecture
Semi-major axis / stellar radius
454.900
RV semi-amplitude (K)
6.700 m/s
Transit mid-time (BJD)
2,456,743.0000
Long. of periastron (ω)
116.00°
Angular separation (arcsec)
98.20000
Eq. Temperature
159K
(-114 °C)
Insolation (S⊕)
0.16
Earth = 1.00
Earth Similarity (ESI)
0.222
0 = alien, 1 = Earth-identical
Beyond the outer HZ boundary (too cold) — surface water would be frozen.
Discovery Paper
Primary reference
Butler et al. 2006Instrument
HIRES Spectrometer
Publication
2006-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2005 at W. M. Keck Observatory (12 shown).
Host System: HD 164922
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,390 K — cooler than the Sun (5,778 K)
Estimated Age
9.58 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.946 R☉
Stellar Mass
0.926 M☉
Metallicity [Fe/H]
0.18
Extended Stellar Properties
Surface gravity (log g)
4.460 dex
Stellar density
1.320 g/cm³
Systemic radial velocity
20.36 km/s
Rotational v·sin i
2.00 km/s
Rotation period
42.30 days
Activity index (log R'HK)
-5.050
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
45.422 mas
Total Proper Motion
717.364 mas/yr
PM Right Ascension
389.65 mas/yr
PM Declination
-602.31 mas/yr
Galactic Cartesian (pc)
x = 0.010 · y = -0.896 · z = 0.443
Equatorial (J2000)
RA 270.63047° · Dec 26.31041°
Galactic ℓ, b
52.296° · 21.783°
Ecliptic λ, β
270.871° · 49.748°
HTM-20 index
-1181639783
Observation Record
Photometric series
1
RV measurements
1
Stellar spectra
6
Archive notes
2
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