Key parameters at a glance
- A radius of 13.30 Earth radii
- A mass of 762.79 Earth masses
- Surface gravity around 4.31 g
- An orbital period of 3,274.000 days
- Semi-major axis 4.0000 AU
- Distance from Earth 129.62 light-years
- Earth Similarity Index 0.379
- Travel time at Voyager 1 speed 2,285,917 years
HIP 54597 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#793of 1771
top 44.7%
This planet
13.30R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HIP 54597 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.30 | 11.21 |
| Mass (M⊕) | 1.00 | 762.79 | 317.83 |
| Density (g/cm³) | 5.51 | 1.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.31 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.01 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 762.788 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 639.000 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HIP
HIP 54597
TIC
TIC 20375215
Gaia DR2
Gaia DR2 5452634262730082176
Gaia DR3
Gaia DR3 5452634262730082176
System
HIP 54597
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 8.96 Earth years on a nearly circular orbit at a mean orbital distance of 4.0000 AU.
Eq. Temperature
—
Insolation (S⊕)
0.01
Earth = 1.00
Earth Similarity (ESI)
0.379
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Frensch et al. 2023Instrument
HARPS Spectrograph
Publication
2023-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2023 at La Silla Observatory (12 shown).
Host System: HIP 54597
Spectral Class
K-type orange
Effective Temperature
4,799 K — cooler than the Sun (5,778 K)
Estimated Age
4.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.660 R☉
Stellar Mass
0.800 M☉
Metallicity [Fe/H]
-0.22
Extended Stellar Properties
Surface gravity (log g)
4.430 dex
Stellar density
3.528 g/cm³
Rotational v·sin i
0.50 km/s
Rotation period
45.00 days
Activity index (log R'HK)
-5.040
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
25.133 mas
Total Proper Motion
75.570 mas/yr
PM Right Ascension
-9.95 mas/yr
PM Declination
-74.91 mas/yr
Galactic Cartesian (pc)
x = -0.851 · y = 0.187 · z = -0.491
Equatorial (J2000)
RA 167.60822° · Dec -29.41430°
Galactic ℓ, b
277.917° · 28.505°
Ecliptic λ, β
181.602° · -31.665°
HTM-20 index
1144996876
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