Key parameters at a glance
- A radius of 12.40 Earth radii
- A mass of 3,591.46 Earth masses
- Surface gravity around 23.36 g
- An orbital period of 10,256.000 days
- Semi-major axis 8.8000 AU
- Distance from Earth 129.61 light-years
- Earth Similarity Index 0.366
- Travel time at Voyager 1 speed 2,285,755 years
HD 16905 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1298of 1771
top 73.2%
This planet
12.40R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 16905 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.40 | 11.21 |
| Mass (M⊕) | 1.00 | 3,591.46 | 317.83 |
| Density (g/cm³) | 5.51 | 10.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 23.36 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 3,591.461 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 16905
HIP
HIP 12436
TIC
TIC 358070171
Gaia DR2
Gaia DR2 4724771790072689664
Gaia DR3
Gaia DR3 4724771790072689664
System
HD 16905
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 28.08 Earth years on a highly eccentric trajectory at a mean orbital distance of 8.8000 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.366
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 16905
Spectral Class
K-type orange
Effective Temperature
4,866 K — cooler than the Sun (5,778 K)
Estimated Age
6.10 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.775 R☉
Stellar Mass
0.850 M☉
Metallicity [Fe/H]
0.24
Extended Stellar Properties
Surface gravity (log g)
4.557 dex
Stellar density
2.393 g/cm³
Rotational v·sin i
1.50 km/s
Activity index (log R'HK)
-4.720
Metallicity ratio
[M/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
25.135 mas
Total Proper Motion
188.281 mas/yr
PM Right Ascension
36.55 mas/yr
PM Declination
-184.70 mas/yr
Galactic Cartesian (pc)
x = 0.367 · y = 0.308 · z = -0.878
Equatorial (J2000)
RA 40.01362° · Dec -61.35504°
Galactic ℓ, b
282.477° · -51.242°
Ecliptic λ, β
349.760° · -68.094°
HTM-20 index
-1547836220
Similar Worlds
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Radius 12.40 R⊕ · 434.5 ly
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Radius 12.40 R⊕ · 1,513.8 ly
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Gas Giant · K-type orange
Radius 12.40 R⊕ · 750.2 ly