Key parameters at a glance
- A radius of 12.60 Earth radii
- A mass of 2,437.43 Earth masses
- Surface gravity around 15.35 g
- An orbital period of 1,818.823 days
- Semi-major axis 3.0750 AU
- Distance from Earth 122.65 light-years
- Earth Similarity Index 0.419
- Travel time at Voyager 1 speed 2,162,938 years
Context from the literature
HD 169830 c is an extrasolar planet, most likely a gas giant, with a minimum mass three and a half times that of Jupiter. Its orbit is eccentric, with a period (year) of 1830 days. In 2022, the true mass and inclination of HD 169830 c were measured via astrometry.
Excerpted from Wikipedia · full article
1 sibling around HD 169830
HD 169830 c 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 | Gas Giant | 13.20 | 804.42 | 225.674 | 345 | 2000 |
| HD 169830 c this | Gas Giant | 12.60 | 2,437.43 | 1,818.823 | — | 2003 |
HD 169830 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1179of 1771
top 66.5%
This planet
12.60R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 169830 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.60 | 11.21 |
| Mass (M⊕) | 1.00 | 2,437.43 | 317.83 |
| Density (g/cm³) | 5.51 | 6.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 15.35 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,437.426 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,125.118 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 about 4.98 Earth years on a mildly elliptical path at a mean orbital distance of 3.0750 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
49.041 m/s
Transit mid-time (BJD)
2,455,139.0000
Long. of periastron (ω)
313.48°
Angular separation (arcsec)
81.80000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.419
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Mayor et al. 2004Instrument
CORALIE Spectrograph
Publication
2004-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2003 at La Silla Observatory (11 shown).
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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