Key parameters at a glance
- A radius of 12.00 Earth radii
- A mass of 7,057.73 Earth masses
- Surface gravity around 49.01 g
- An orbital period of 529.930 days
- Semi-major axis 1.7650 AU
- Distance from Earth 150.72 light-years
- Earth Similarity Index 0.278
- Travel time at Voyager 1 speed 2,657,929 years
1 sibling around nu Oph
nu Oph 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 |
|---|---|---|---|---|---|---|
| nu Oph b this | Gas Giant | 12.00 | 7,057.73 | 529.930 | — | 2012 |
| nu Oph c | Gas Giant | 12.00 | 7,838.32 | 3,180.600 | — | 2012 |
nu Oph b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1494of 1771
top 84.3%
This planet
12.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | nu Oph b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.00 | 11.21 |
| Mass (M⊕) | 1.00 | 7,057.73 | 317.83 |
| Density (g/cm³) | 5.51 | 22.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 49.01 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 7,057.733 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 6,848.567 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 163917
HIP
HIP 88048
TIC
TIC 9815387
Gaia DR2
Gaia DR2 4164319171169516160
Gaia DR3
Gaia DR3 4164319171172759040
System
nu Oph
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 1.45 Earth years on a mildly elliptical path at a mean orbital distance of 1.7650 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.278
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Sato et al. 2012Instrument
HIDES Echelle Spectrograph
Publication
2012-12
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at Okayama Astrophysical Observatory (5 shown).
Host System: nu Oph
Spectral Class
K-type orange
Effective Temperature
4,887 K — cooler than the Sun (5,778 K)
Estimated Age
0.65 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
12.240 R☉
Stellar Mass
2.610 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
2.640 dex
Rotational v·sin i
3.21 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
21.640 mas
Total Proper Motion
116.430 mas/yr
PM Right Ascension
-10.00 mas/yr
PM Declination
-116.00 mas/yr
Galactic Cartesian (pc)
x = -0.004 · y = -0.985 · z = -0.170
Equatorial (J2000)
RA 269.75660° · Dec -9.77413°
Galactic ℓ, b
18.168° · 6.974°
Ecliptic λ, β
269.749° · 13.665°
HTM-20 index
953920305
Similar Worlds
HD 180314 b
Gas Giant · K-type orange
Radius 12.00 R⊕ · 399.1 ly
nu Oph c
Gas Giant · K-type orange
Radius 12.00 R⊕ · 150.7 ly
GJ 680 b
Gas Giant · K-type orange
Radius 12.00 R⊕ · 31.5 ly
HD 81817 b
Gas Giant · K-type orange
Radius 12.00 R⊕ · 877.8 ly
HD 81817 c
Gas Giant · K-type orange
Radius 12.00 R⊕ · 877.8 ly
HAT-P-68 b
Gas Giant · K-type orange
Radius 12.02 R⊕ · 659.3 ly