Key parameters at a glance
- A radius of 13.10 Earth radii
- A mass of 1,069.49 Earth masses
- Surface gravity around 6.23 g
- An orbital period of 3,184.200 days
- Semi-major axis 4.7250 AU
- Distance from Earth 178.68 light-years
- Earth Similarity Index 0.405
- Travel time at Voyager 1 speed 3,151,050 years
1 sibling around HD 4732
HD 4732 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 4732 b | Gas Giant | 13.40 | 631.21 | 371.740 | — | 2012 |
| HD 4732 c this | Gas Giant | 13.10 | 1,069.49 | 3,184.200 | — | 2012 |
HD 4732 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#910of 1771
top 51.3%
This planet
13.10R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 4732 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.10 | 11.21 |
| Mass (M⊕) | 1.00 | 1,069.49 | 317.83 |
| Density (g/cm³) | 5.51 | 2.61 | 1.33 |
| Surface Gravity (g) | 1.00 | 6.23 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 1,069.493 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 4732
HIP
HIP 3834
TIC
TIC 63905972
Gaia DR2
Gaia DR2 2345744256120965504
Gaia DR3
Gaia DR3 2345744256120965504
System
HD 4732
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 8.72 Earth years on a mildly elliptical path at a mean orbital distance of 4.7250 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.405
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Sato et al. 2013Instrument
Multiple Instruments
Publication
2013-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at Multiple Observatories (2 shown).
Host System: HD 4732
Spectral Class
K-type orange
Effective Temperature
4,898 K — cooler than the Sun (5,778 K)
Estimated Age
1.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
5.030 R☉
Stellar Mass
1.390 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
3.170 dex
Systemic radial velocity
25.00 km/s
Rotational v·sin i
1.45 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
18.225 mas
Total Proper Motion
98.730 mas/yr
PM Right Ascension
80.97 mas/yr
PM Declination
-56.49 mas/yr
Galactic Cartesian (pc)
x = 0.892 · y = 0.195 · z = -0.409
Equatorial (J2000)
RA 12.30851° · Dec -24.13691°
Galactic ℓ, b
113.383° · -86.968°
Ecliptic λ, β
1.013° · -26.908°
HTM-20 index
246905729
Observation Record
Photometric series
1
RV measurements
1
Archive notes
2
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