Key parameters at a glance
- A radius of 12.50 Earth radii
- A mass of 2,958.98 Earth masses
- Surface gravity around 18.94 g
- An orbital period of 4,667.978 days
- Semi-major axis 5.5850 AU
- Distance from Earth 176.76 light-years
- Earth Similarity Index 0.393
- Travel time at Voyager 1 speed 3,117,195 years
1 sibling around HD 183263
HD 183263 c 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 183263 b | Gas Giant | 13.10 | 1,103.18 | 624.874 | — | 2004 |
| HD 183263 c this | Gas Giant | 12.50 | 2,958.98 | 4,667.978 | — | 2008 |
HD 183263 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1235of 1771
top 69.7%
This planet
12.50R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 183263 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.50 | 11.21 |
| Mass (M⊕) | 1.00 | 2,958.98 | 317.83 |
| Density (g/cm³) | 5.51 | 8.32 | 1.33 |
| Surface Gravity (g) | 1.00 | 18.94 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,958.982 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 2,192.930 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 183263
HIP
HIP 95740
TIC
TIC 134245358
Gaia DR2
Gaia DR2 4296208099222829568
Gaia DR3
Gaia DR3 4296208099222829568
System
HD 183263
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 12.78 Earth years on a nearly circular orbit at a mean orbital distance of 5.5850 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
78.198 m/s
Transit mid-time (BJD)
2,457,195.7000
Long. of periastron (ω)
297.16°
Angular separation (arcsec)
103.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.393
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
Wright et al. 2009Instrument
HIRES Spectrometer
Publication
2009-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2008 at W. M. Keck Observatory (7 shown).
Host System: HD 183263
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,948 K — hotter than the Sun (5,778 K)
Estimated Age
8.13 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.230 R☉
Stellar Mass
1.060 M☉
Metallicity [Fe/H]
0.28
Extended Stellar Properties
Surface gravity (log g)
4.370 dex
Stellar density
0.694 g/cm³
Systemic radial velocity
-50.34 km/s
Rotational v·sin i
1.60 km/s
Activity index (log R'HK)
-5.110
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
18.423 mas
Total Proper Motion
37.419 mas/yr
PM Right Ascension
-19.13 mas/yr
PM Declination
-32.16 mas/yr
Galactic Cartesian (pc)
x = 0.372 · y = -0.917 · z = 0.145
Equatorial (J2000)
RA 292.10230° · Dec 8.35792°
Galactic ℓ, b
44.609° · -4.310°
Ecliptic λ, β
295.418° · 29.867°
HTM-20 index
-1407203443
Observation Record
Photometric series
1
RV measurements
3
Stellar spectra
2
Archive notes
1
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