Key parameters at a glance
- A radius of 12.31 Earth radii
- A mass of 79.46 Earth masses
- Surface gravity around 0.52 g
- An orbital period of 2.818 days
- Semi-major axis 0.0400 AU
- Distance from Earth 122.93 light-years
- Earth Similarity Index 0.250
- Travel time at Voyager 1 speed 2,167,804 years
- Almost certainly tidally locked to its host star given the close orbit
HD 63454 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1348of 1771
top 76.1%
This planet
12.31R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 63454 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.31 | 11.21 |
| Mass (M⊕) | 1.00 | 79.46 | 317.83 |
| Density (g/cm³) | 5.51 | 0.23 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.52 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 79.458 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 63454
HIP
HIP 37284
TIC
TIC 278380701
Gaia DR2
Gaia DR2 5209903017765189760
Gaia DR3
Gaia DR3 5209903017765189760
System
HD 63454
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.82 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0400 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.250
0 = alien, 1 = Earth-identical
Insufficient insolation data. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Moutou et al. 2005Instrument
HARPS Spectrograph
Publication
2005-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2005 at La Silla Observatory (10 shown).
Host System: HD 63454
Spectral Class
K-type orange
Effective Temperature
4,812 K — cooler than the Sun (5,778 K)
Estimated Age
1.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.770 R☉
Stellar Mass
0.420 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
4.280 dex
Stellar density
2.362 g/cm³
Systemic radial velocity
33.84 km/s
Rotational v·sin i
1.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
26.504 mas
Total Proper Motion
44.533 mas/yr
PM Right Ascension
-19.71 mas/yr
PM Declination
-39.93 mas/yr
Galactic Cartesian (pc)
x = -0.085 · y = 0.184 · z = -0.979
Equatorial (J2000)
RA 114.84064° · Dec -78.27915°
Galactic ℓ, b
290.354° · -24.139°
Ecliptic λ, β
248.825° · -76.332°
HTM-20 index
-1139366989
Observation Record
Photometric series
1
RV measurements
1
Archive notes
1
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