Key parameters at a glance
- A radius of 12.90 Earth radii
- A mass of 1,382.55 Earth masses
- Surface gravity around 8.31 g
- An orbital period of 1,039.150 days
- Semi-major axis 1.9880 AU
- Distance from Earth 223.46 light-years
- Earth Similarity Index 0.423
- Travel time at Voyager 1 speed 3,940,796 years
Context from the literature
HD 143361 b is an exoplanet located approximately 224 light-years away in the constellation of Norma, orbiting the 9th magnitude G-type main sequence star HD 143361. This planet has a minimum mass of 3.0 times that of Jupiter. Because the inclination was initially unknown, the true mass was not known. This planet orbits at a distance of 2.0 AU with an orbital eccentricity of 0.18.
Excerpted from Wikipedia · full article
HD 143361 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1011of 1771
top 57.0%
This planet
12.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 143361 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.90 | 11.21 |
| Mass (M⊕) | 1.00 | 1,382.55 | 317.83 |
| Density (g/cm³) | 5.51 | 3.54 | 1.33 |
| Surface Gravity (g) | 1.00 | 8.31 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,382.554 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,122.576 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 143361
HIP
HIP 78521
TIC
TIC 255480497
Gaia DR2
Gaia DR2 5991331601015519104
Gaia DR3
Gaia DR3 5991331601015519104
System
HD 143361
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 2.85 Earth years on a mildly elliptical path at a mean orbital distance of 1.9880 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.423
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
Minniti et al. 2009Instrument
MIKE Spectrograph
Publication
2009-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2008 at Las Campanas Observatory (3 shown).
Host System: HD 143361
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,507 K — cooler than the Sun (5,778 K)
Estimated Age
2.94 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.916 R☉
Stellar Mass
0.968 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.472 dex
Stellar density
1.245 g/cm³
Systemic radial velocity
-0.27 km/s
Rotational v·sin i
1.50 km/s
Rotation period
42.00 days
Activity index (log R'HK)
-5.010
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
14.567 mas
Total Proper Motion
197.348 mas/yr
PM Right Ascension
-156.50 mas/yr
PM Declination
-120.22 mas/yr
Galactic Cartesian (pc)
x = -0.352 · y = -0.621 · z = -0.700
Equatorial (J2000)
RA 240.45884° · Dec -44.43506°
Galactic ℓ, b
334.969° · 6.274°
Ecliptic λ, β
247.460° · -23.280°
HTM-20 index
-1729539816
Observation Record
Photometric series
1
RV measurements
2
Archive notes
2
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