Key parameters at a glance
- A radius of 13.70 Earth radii
- A mass of 365.50 Earth masses
- Surface gravity around 1.95 g
- An orbital period of 89.230 days
- Semi-major axis 0.4200 AU
- Distance from Earth 209.13 light-years
- Earth Similarity Index 0.320
- Travel time at Voyager 1 speed 3,687,920 years
1 sibling around HIP 67851
HIP 67851 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 |
|---|---|---|---|---|---|---|
| HIP 67851 b this | Gas Giant | 13.70 | 365.50 | 89.230 | — | 2015 |
| HIP 67851 c | Gas Giant | 12.70 | 2,204.78 | 3,128.410 | — | 2015 |
HIP 67851 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#554of 1771
top 31.2%
This planet
13.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HIP 67851 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.70 | 11.21 |
| Mass (M⊕) | 1.00 | 365.50 | 317.83 |
| Density (g/cm³) | 5.51 | 0.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.95 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 365.503 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 121056
HIP
HIP 67851
TIC
TIC 111947706
Gaia DR2
Gaia DR2 6169943210465504384
Gaia DR3
Gaia DR3 6169943210465504384
System
HIP 67851
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 89.23 Earth days (24.4% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.4200 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.320
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Jones et al. 2015Instrument
Multiple Instruments
Publication
2015-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2015 at Multiple Observatories (8 shown).
Host System: HIP 67851
Spectral Class
K-type orange
Effective Temperature
4,840 K — cooler than the Sun (5,778 K)
Estimated Age
5.46 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
5.450 R☉
Stellar Mass
1.280 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
3.110 dex
Systemic radial velocity
5.58 km/s
Rotational v·sin i
3.33 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
15.567 mas
Total Proper Motion
303.039 mas/yr
PM Right Ascension
-295.04 mas/yr
PM Declination
-69.16 mas/yr
Galactic Cartesian (pc)
x = -0.717 · y = -0.389 · z = -0.578
Equatorial (J2000)
RA 208.46536° · Dec -35.31465°
Galactic ℓ, b
317.049° · 25.840°
Ecliptic λ, β
219.279° · -22.065°
HTM-20 index
-908909211
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