Key parameters at a glance
- A radius of 12.50 Earth radii
- A mass of 3,127.45 Earth masses
- Surface gravity around 20.02 g
- An orbital period of 8.428 days
- Semi-major axis 0.0800 AU
- Equilibrium temperature 650 K (377 °C)
- Distance from Earth 100.54 light-years
- Earth Similarity Index 0.248
- Travel time at Voyager 1 speed 1,772,969 years
- Almost certainly tidally locked to its host star given the close orbit
HD 162020 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1235of 1771
top 69.7%
This planet
12.50R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 162020 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.50 | 11.21 |
| Mass (M⊕) | 1.00 | 3,127.45 | 317.83 |
| Density (g/cm³) | 5.51 | 8.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 20.02 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 3,127.447 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 162020
HIP
HIP 87330
TIC
TIC 367987991
Gaia DR2
Gaia DR2 5957920668132624256
Gaia DR3
Gaia DR3 5957920668132624256
System
HD 162020
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.43 Earth days (2.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0800 AU.
Eq. Temperature
650K
(377 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.248
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Udry et al. 2002Instrument
CORALIE Spectrograph
Publication
2002-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2002 at La Silla Observatory (4 shown).
Host System: HD 162020
Spectral Class
K-type orange
Effective Temperature
4,723 K — cooler than the Sun (5,778 K)
Estimated Age
6.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.750 R☉
Stellar Mass
0.420 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.310 dex
Stellar density
2.645 g/cm³
Systemic radial velocity
-27.33 km/s
Rotational v·sin i
1.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
32.413 mas
Total Proper Motion
32.438 mas/yr
PM Right Ascension
20.28 mas/yr
PM Declination
-25.32 mas/yr
Galactic Cartesian (pc)
x = -0.031 · y = -0.762 · z = -0.647
Equatorial (J2000)
RA 267.65993° · Dec -40.31846°
Galactic ℓ, b
350.739° · -6.726°
Ecliptic λ, β
268.132° · -16.894°
HTM-20 index
1560126950
Observation Record
Photometric series
1
RV measurements
1
Archive notes
1
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