Key parameters at a glance
- A radius of 9.03 Earth radii
- A mass of 60.16 Earth masses
- Surface gravity around 0.74 g
- An orbital period of 225.790 days
- Semi-major axis 0.6793 AU
- Distance from Earth 112.05 light-years
- Earth Similarity Index 0.327
- Travel time at Voyager 1 speed 1,975,960 years
1 sibling around HD 45364
HD 45364 b 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 45364 b this | Neptune-like | 9.03 | 60.16 | 225.790 | — | 2008 |
| HD 45364 c | Gas Giant | 14.20 | 174.49 | 345.430 | — | 2008 |
HD 45364 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#87of 574
top 15.0%
This planet
9.03R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | HD 45364 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 9.03 | 11.21 |
| Mass (M⊕) | 1.00 | 60.16 | 317.83 |
| Density (g/cm³) | 5.51 | 0.45 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.74 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 60.165 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 45364
HIP
HIP 30579
TIC
TIC 117768715
Gaia DR2
Gaia DR2 2893174259322992256
Gaia DR3
Gaia DR3 2893174259322992256
System
HD 45364
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 225.79 Earth days (61.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6793 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.327
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Correia et al. 2009Instrument
HARPS Spectrograph
Publication
2009-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2008 at La Silla Observatory (12 shown).
Host System: HD 45364
Spectral Class
K-type orange
Effective Temperature
5,466 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.890 R☉
Stellar Mass
0.820 M☉
Metallicity [Fe/H]
-0.17
Extended Stellar Properties
Surface gravity (log g)
4.380 dex
Stellar density
1.836 g/cm³
Systemic radial velocity
16.31 km/s
Rotational v·sin i
1.00 km/s
Rotation period
32.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
29.080 mas
Total Proper Motion
53.527 mas/yr
PM Right Ascension
52.18 mas/yr
PM Declination
-11.93 mas/yr
Galactic Cartesian (pc)
x = -0.095 · y = 0.847 · z = -0.522
Equatorial (J2000)
RA 96.41057° · Dec -31.48100°
Galactic ℓ, b
239.355° · -18.867°
Ecliptic λ, β
99.483° · -54.709°
HTM-20 index
-1379092737
Similar Worlds
Kepler-46 b
Neptune-like · K-type orange
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WASP-139 b
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HATS-48 A b
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TOI-1268 b
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K2-139 b
Neptune-like · K-type orange
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NGTS-11 b
Neptune-like · K-type orange
Radius 9.16 R⊕ · 621.1 ly