Key parameters at a glance
- A radius of 13.50 Earth radii
- A mass of 519.97 Earth masses
- Surface gravity around 2.85 g
- An orbital period of 2,447.100 days
- Semi-major axis 3.8330 AU
- Distance from Earth 150.96 light-years
- Earth Similarity Index 0.349
- Travel time at Voyager 1 speed 2,662,174 years
1 sibling around HD 50499
HD 50499 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 50499 b this | Gas Giant | 13.50 | 519.97 | 2,447.100 | — | 2005 |
| HD 50499 c | Gas Giant | 13.20 | 931.24 | 8,619.900 | — | 2019 |
HD 50499 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#671of 1771
top 37.8%
This planet
13.50R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 50499 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.50 | 11.21 |
| Mass (M⊕) | 1.00 | 519.97 | 317.83 |
| Density (g/cm³) | 5.51 | 1.16 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.85 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 519.970 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 50499
HIP
HIP 32970
TIC
TIC 53175558
Gaia DR2
Gaia DR2 5579783574073770112
Gaia DR3
Gaia DR3 5579783574073770112
System
HD 50499
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 6.70 Earth years on a mildly elliptical path at a mean orbital distance of 3.8330 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
21.990 m/s
Transit mid-time (BJD)
2,455,005.0000
Long. of periastron (ω)
288.31°
Angular separation (arcsec)
82.80000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.349
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Vogt et al. 2005Instrument
HIRES Spectrometer
Publication
2005-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2005 at W. M. Keck Observatory (12 shown).
Host System: HD 50499
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
6,102 K — hotter than the Sun (5,778 K)
Estimated Age
2.39 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.351 R☉
Stellar Mass
1.253 M☉
Metallicity [Fe/H]
0.26
Extended Stellar Properties
Surface gravity (log g)
4.247 dex
Stellar density
0.510 g/cm³
Systemic radial velocity
36.94 km/s
Rotational v·sin i
4.31 km/s
Rotation period
25.00 days
Activity index (log R'HK)
-5.020
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
21.577 mas
Total Proper Motion
97.171 mas/yr
PM Right Ascension
-69.33 mas/yr
PM Declination
68.09 mas/yr
Galactic Cartesian (pc)
x = -0.187 · y = 0.809 · z = -0.558
Equatorial (J2000)
RA 103.00808° · Dec -33.91527°
Galactic ℓ, b
243.878° · -14.626°
Ecliptic λ, β
109.759° · -56.466°
HTM-20 index
820500915
Observation Record
Photometric series
1
RV measurements
1
Stellar spectra
2
Archive notes
1
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