Key parameters at a glance
- A radius of 14.10 Earth radii
- A mass of 127.77 Earth masses
- Surface gravity around 0.64 g
- An orbital period of 2.986 days
- Semi-major axis 0.0406 AU
- Distance from Earth 133.39 light-years
- Earth Similarity Index 0.242
- Travel time at Voyager 1 speed 2,352,418 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around HD 83443
HD 83443 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 83443 b this | Gas Giant | 14.10 | 127.77 | 2.986 | — | 2002 |
| HD 83443 c | Gas Giant | 13.60 | 476.74 | 8,241.000 | — | 2022 |
HD 83443 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#371of 1771
top 20.9%
This planet
14.10R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 83443 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.10 | 11.21 |
| Mass (M⊕) | 1.00 | 127.77 | 317.83 |
| Density (g/cm³) | 5.51 | 0.25 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.64 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 127.767 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 83443
HIP
HIP 47202
TIC
TIC 32820141
Gaia DR2
Gaia DR2 5424836719001215360
Gaia DR3
Gaia DR3 5424836719001215360
System
HD 83443
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.99 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0406 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
56.730 m/s
Transit mid-time (BJD)
2,452,307.3690
Long. of periastron (ω)
344.00°
Angular separation (arcsec)
0.99300
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.242
0 = alien, 1 = Earth-identical
Insufficient insolation data. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Butler et al. 2002Instrument
Multiple Instruments
Publication
2002-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2002 at Multiple Observatories (2 shown).
Host System: HD 83443
Spectral Class
K-type orange
Effective Temperature
5,442 K — cooler than the Sun (5,778 K)
Estimated Age
2.64 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.940 R☉
Stellar Mass
1.000 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
4.390 dex
Stellar density
1.320 g/cm³
Systemic radial velocity
28.89 km/s
Rotational v·sin i
1.30 km/s
Rotation period
35.30 days
Activity index (log R'HK)
-4.840
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
24.422 mas
Total Proper Motion
122.134 mas/yr
PM Right Ascension
21.74 mas/yr
PM Declination
-120.18 mas/yr
Galactic Cartesian (pc)
x = -0.591 · y = 0.425 · z = -0.685
Equatorial (J2000)
RA 144.29941° · Dec -43.27272°
Galactic ℓ, b
269.596° · 6.679°
Ecliptic λ, β
168.789° · -52.932°
HTM-20 index
280604857
Observation Record
Photometric series
1
RV measurements
5
Stellar spectra
1
Archive notes
2
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