Key parameters at a glance
- A radius of 13.70 Earth radii
- A mass of 365.49 Earth masses
- Surface gravity around 1.95 g
- An orbital period of 10.709 days
- Semi-major axis 0.0925 AU
- Equilibrium temperature 720 K (447 °C)
- Distance from Earth 103.97 light-years
- Earth Similarity Index 0.195
- Travel time at Voyager 1 speed 1,833,466 years
- Almost certainly tidally locked to its host star given the close orbit
HD 130322 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#554of 1771
top 31.2%
This planet
13.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 130322 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.70 | 11.21 |
| Mass (M⊕) | 1.00 | 365.49 | 317.83 |
| Density (g/cm³) | 5.51 | 0.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.95 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 365.490 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 130322
HIP
HIP 72339
TIC
TIC 189694184
Gaia DR2
Gaia DR2 3650718804281798912
Gaia DR3
Gaia DR3 3650718804281798912
System
HD 130322
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.71 Earth days (2.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0925 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
112.500 m/s
Transit mid-time (BJD)
2,455,631.7770
Long. of periastron (ω)
193.00°
Angular separation (arcsec)
2.90000
Eq. Temperature
720K
(447 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.195
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. 2000Instrument
CORALIE Spectrograph
Publication
2000-04
Observation locale
Ground
Discovery cohort
Planets confirmed in 1999 at La Silla Observatory (4 shown).
Host System: HD 130322
Spectral Class
K-type orange
Effective Temperature
5,387 K — cooler than the Sun (5,778 K)
Estimated Age
0.35 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.850 R☉
Stellar Mass
0.920 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.520 dex
Stellar density
1.958 g/cm³
Systemic radial velocity
-12.50 km/s
Rotational v·sin i
0.50 km/s
Activity index (log R'HK)
-4.780
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
31.342 mas
Total Proper Motion
191.861 mas/yr
PM Right Ascension
-130.80 mas/yr
PM Declination
-140.37 mas/yr
Galactic Cartesian (pc)
x = -0.744 · y = -0.668 · z = -0.005
Equatorial (J2000)
RA 221.88580° · Dec -0.28208°
Galactic ℓ, b
353.214° · 50.891°
Ecliptic λ, β
219.533° · 15.133°
HTM-20 index
1666767985
Observation Record
Photometric series
1
RV measurements
4
Archive notes
1
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