Key parameters at a glance
- A radius of 12.20 Earth radii
- A mass of 4,868.18 Earth masses
- Surface gravity around 32.71 g
- An orbital period of 7,325.647 days
- Semi-major axis 7.4570 AU
- Distance from Earth 155.88 light-years
- Earth Similarity Index 0.325
- Travel time at Voyager 1 speed 2,749,025 years
2 siblings around HD 204313
HD 204313 e shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 204313 c | Neptune-like | 4.31 | 17.16 | 34.959 | — | 2015 |
| HD 204313 b | Gas Giant | 12.90 | 1,466.78 | 2,041.115 | — | 2010 |
| HD 204313 e this | Gas Giant | 12.20 | 4,868.18 | 7,325.647 | — | 2022 |
HD 204313 e Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1410of 1771
top 79.6%
This planet
12.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 204313 e | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.20 | 11.21 |
| Mass (M⊕) | 1.00 | 4,868.18 | 317.83 |
| Density (g/cm³) | 5.51 | 14.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 32.71 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4,868.178 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 5,085.255 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 204313
HIP
HIP 106006
TIC
TIC 99734092
Gaia DR2
Gaia DR2 6828450688663428224
Gaia DR3
Gaia DR3 6828450688663428224
System
HD 204313
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 20.06 Earth years on a mildly elliptical path at a mean orbital distance of 7.4570 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.325
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 204313
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,767 K — cooler than the Sun (5,778 K)
Estimated Age
3.38 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.100 R☉
Stellar Mass
1.030 M☉
Metallicity [Fe/H]
0.18
Extended Stellar Properties
Surface gravity (log g)
4.370 dex
Stellar density
1.015 g/cm³
Systemic radial velocity
-9.74 km/s
Rotational v·sin i
2.40 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
20.894 mas
Total Proper Motion
273.881 mas/yr
PM Right Ascension
42.76 mas/yr
PM Declination
-270.52 mas/yr
Galactic Cartesian (pc)
x = 0.733 · y = -0.571 · z = -0.370
Equatorial (J2000)
RA 322.05106° · Dec -21.72742°
Galactic ℓ, b
28.026° · -43.729°
Ecliptic λ, β
317.490° · -6.454°
HTM-20 index
-522785699
Observation Record
Photometric series
1
RV measurements
1
Archive notes
1
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