Key parameters at a glance
- A radius of 13.20 Earth radii
- A mass of 804.42 Earth masses
- Surface gravity around 4.62 g
- An orbital period of 225.674 days
- Semi-major axis 0.7650 AU
- Equilibrium temperature 345 K (72 °C)
- Distance from Earth 122.65 light-years
- Earth Similarity Index 0.429
- Travel time at Voyager 1 speed 2,162,938 years
Context from the literature
HD 169830 b is an extrasolar planet three times the mass of Jupiter. Due to its high mass, it is most likely a gas giant planet, akin to Jupiter and Saturn in the Solar System. This planet at 0.8 AU is slightly farther out than Venus is in the Solar System, orbiting around its star every 262 days.
Excerpted from Wikipedia · full article
1 sibling around HD 169830
HD 169830 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 |
|---|---|---|---|---|---|---|
| HD 169830 b this | Gas Giant | 13.20 | 804.42 | 225.674 | 345 | 2000 |
| HD 169830 c | Gas Giant | 12.60 | 2,437.43 | 1,818.823 | — | 2003 |
HD 169830 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#847of 1771
top 47.8%
This planet
13.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 169830 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.20 | 11.21 |
| Mass (M⊕) | 1.00 | 804.42 | 317.83 |
| Density (g/cm³) | 5.51 | 1.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.62 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 804.424 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 169830
HIP
HIP 90485
TIC
TIC 53134037
Gaia DR2
Gaia DR2 4048037707717866880
Gaia DR3
Gaia DR3 4048037707717866880
System
HD 169830
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 225.67 Earth days (61.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.7650 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
79.460 m/s
Transit mid-time (BJD)
2,455,515.7500
Long. of periastron (ω)
147.74°
Angular separation (arcsec)
20.30000
Eq. Temperature
345K
(72 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.429
0 = alien, 1 = Earth-identical
Insufficient insolation data — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Naef et al. 2001Instrument
CORALIE Spectrograph
Publication
2001-08
Observation locale
Ground
Host System: HD 169830
Spectral Class
F-type yellow-white
Effective Temperature
6,300 K — hotter than the Sun (5,778 K)
Estimated Age
2.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.936 R☉
Stellar Mass
1.170 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.009 dex
Stellar density
0.215 g/cm³
Systemic radial velocity
-17.22 km/s
Rotational v·sin i
3.80 km/s
Activity index (log R'HK)
-4.950
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
26.564 mas
Total Proper Motion
16.460 mas/yr
PM Right Ascension
-0.49 mas/yr
PM Declination
16.45 mas/yr
Galactic Cartesian (pc)
x = 0.105 · y = -0.861 · z = -0.497
Equatorial (J2000)
RA 276.95619° · Dec -29.81679°
Galactic ℓ, b
3.687° · -8.471°
Ecliptic λ, β
276.067° · -6.524°
HTM-20 index
-1994034644
Observation Record
Photometric series
1
RV measurements
1
Stellar spectra
2
Archive notes
3
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