Key parameters at a glance
- A radius of 12.70 Earth radii
- A mass of 2,154.88 Earth masses
- Surface gravity around 13.36 g
- An orbital period of 14,773.933 days
- Semi-major axis 10.9610 AU
- Distance from Earth 130.13 light-years
- Earth Similarity Index 0.437
- Travel time at Voyager 1 speed 2,294,832 years
HD 168863 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1130of 1771
top 63.7%
This planet
12.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 168863 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.70 | 11.21 |
| Mass (M⊕) | 1.00 | 2,154.88 | 317.83 |
| Density (g/cm³) | 5.51 | 5.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 13.36 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,154.877 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 168863
HIP
HIP 90055
TIC
TIC 167730892
Gaia DR2
Gaia DR2 4096449891854565760
Gaia DR3
Gaia DR3 4096449891854565760
System
HD 168863
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 40.45 Earth years on a mildly elliptical path at a mean orbital distance of 10.9610 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.437
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Astrometry
Positional wobble of the host star was measured.
Discovery Paper
Primary reference
Feng et al. 2022Instrument
Multiple Instruments
Publication
2022-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2022 at Multiple Observatories (12 shown).
Host System: HD 168863
Spectral Class
K-type orange
Effective Temperature
4,905 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.778 R☉
Stellar Mass
0.800 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.559 dex
Stellar density
2.397 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
25.035 mas
Total Proper Motion
261.609 mas/yr
PM Right Ascension
-134.32 mas/yr
PM Declination
-224.49 mas/yr
Galactic Cartesian (pc)
x = 0.094 · y = -0.946 · z = -0.309
Equatorial (J2000)
RA 275.66422° · Dec -18.02197°
Galactic ℓ, b
13.672° · -2.010°
Ecliptic λ, β
275.405° · 5.311°
HTM-20 index
-1882017003
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