Key parameters at a glance
- A radius of 13.80 Earth radii
- A mass of 295.57 Earth masses
- Surface gravity around 1.55 g
- An orbital period of 1,818.000 days
- Semi-major axis 2.4400 AU
- Distance from Earth 53.10 light-years
- Earth Similarity Index 0.303
- Travel time at Voyager 1 speed 936,484 years
1 sibling around HD 113538
HD 113538 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 113538 b | Gas Giant | 13.20 | 114.41 | 663.200 | — | 2010 |
| HD 113538 c this | Gas Giant | 13.80 | 295.57 | 1,818.000 | — | 2010 |
HD 113538 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#510of 1771
top 28.7%
This planet
13.80R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 113538 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.80 | 11.21 |
| Mass (M⊕) | 1.00 | 295.57 | 317.83 |
| Density (g/cm³) | 5.51 | 0.62 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.55 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 295.570 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 113538
HIP
HIP 63833
TIC
TIC 422214062
Gaia DR2
Gaia DR2 6080301367488384896
Gaia DR3
Gaia DR3 6080301367488384896
System
HD 113538
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 4.98 Earth years on a mildly elliptical path at a mean orbital distance of 2.4400 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.303
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Moutou et al. 2011Instrument
HARPS Spectrograph
Publication
2011-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at La Silla Observatory (12 shown).
Host System: HD 113538
Spectral Class
K-type orange
Effective Temperature
4,462 K — cooler than the Sun (5,778 K)
Estimated Age
4.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.530 R☉
Stellar Mass
0.585 M☉
Metallicity [Fe/H]
-0.24
Extended Stellar Properties
Surface gravity (log g)
3.790 dex
Stellar density
1.970 g/cm³
Systemic radial velocity
39.20 km/s
Rotational v·sin i
2.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
61.390 mas
Total Proper Motion
1,118.401 mas/yr
PM Right Ascension
-786.04 mas/yr
PM Declination
-795.59 mas/yr
Galactic Cartesian (pc)
x = -0.585 · y = -0.170 · z = -0.793
Equatorial (J2000)
RA 196.23393° · Dec -52.44635°
Galactic ℓ, b
305.022° · 10.371°
Ecliptic λ, β
218.866° · -41.268°
HTM-20 index
707056499
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