Key parameters at a glance
- A radius of 12.70 Earth radii
- A mass of 2,080.00 Earth masses
- Surface gravity around 12.90 g
- An orbital period of 1,008.000 days
- Semi-major axis 1.9220 AU
- Distance from Earth 131.85 light-years
- Earth Similarity Index 0.441
- Travel time at Voyager 1 speed 2,325,184 years
Context from the literature
HD 147018 c is a gas giant extrasolar planet which orbits the G-type main sequence star HD 147018, located approximately 140 light years away in the constellation Triangulum Australe. It has mass at least six and a half time more than Jupiter and orbits HD 147018 nearly twice the distance between the Earth and the Sun. This planet is eight times farther away than HD 147018 b. This planet was discovered on August 11, 2009 by radial velocity method.
Excerpted from Wikipedia · full article
1 sibling around HD 147018
HD 147018 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 147018 b | Gas Giant | 13.40 | 674.00 | 44.236 | — | 2009 |
| HD 147018 c this | Gas Giant | 12.70 | 2,080.00 | 1,008.000 | — | 2009 |
HD 147018 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1130of 1771
top 63.7%
This planet
12.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 147018 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.70 | 11.21 |
| Mass (M⊕) | 1.00 | 2,080.00 | 317.83 |
| Density (g/cm³) | 5.51 | 5.58 | 1.33 |
| Surface Gravity (g) | 1.00 | 12.90 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 2,080.000 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 147018
HIP
HIP 80250
TIC
TIC 350083732
Gaia DR2
Gaia DR2 5831054382288870912
Gaia DR3
Gaia DR3 5831054382288870912
System
HD 147018
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 2.76 Earth years on a mildly elliptical path at a mean orbital distance of 1.9220 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.441
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Segransan et al. 2010Instrument
CORALIE Spectrograph
Publication
2010-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at La Silla Observatory (12 shown).
Host System: HD 147018
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,441 K — cooler than the Sun (5,778 K)
Estimated Age
6.36 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.938 R☉
Stellar Mass
0.927 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
4.420 dex
Stellar density
1.676 g/cm³
Systemic radial velocity
-27.35 km/s
Rotational v·sin i
1.56 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
24.708 mas
Total Proper Motion
362.651 mas/yr
PM Right Ascension
-177.50 mas/yr
PM Declination
-316.24 mas/yr
Galactic Cartesian (pc)
x = -0.195 · y = -0.432 · z = -0.880
Equatorial (J2000)
RA 245.74900° · Dec -61.69013°
Galactic ℓ, b
325.410° · -8.441°
Ecliptic λ, β
255.380° · -39.476°
HTM-20 index
1065003242
Similar Worlds
HR 810 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 56.5 ly
HD 120084 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 336.1 ly
HD 125612 d
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 187.9 ly
HD 11977 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 221.6 ly
HD 126614 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 238.4 ly
HD 30177 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 181.3 ly