Key parameters at a glance
- A radius of 13.10 Earth radii
- A mass of 1,080.60 Earth masses
- Surface gravity around 6.30 g
- An orbital period of 5,584.000 days
- Semi-major axis 5.6000 AU
- Distance from Earth 301.31 light-years
- Earth Similarity Index 0.405
- Travel time at Voyager 1 speed 5,313,655 years
1 sibling around HAT-P-17
HAT-P-17 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 |
|---|---|---|---|---|---|---|
| HAT-P-17 b | Gas Giant | 11.77 | 184.34 | 10.339 | 800 | 2010 |
| HAT-P-17 c this | Gas Giant | 13.10 | 1,080.60 | 5,584.000 | — | 2010 |
HAT-P-17 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#910of 1771
top 51.3%
This planet
13.10R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-17 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.10 | 11.21 |
| Mass (M⊕) | 1.00 | 1,080.60 | 317.83 |
| Density (g/cm³) | 5.51 | 2.64 | 1.33 |
| Surface Gravity (g) | 1.00 | 6.30 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 1,080.600 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 266593143
Gaia DR2
Gaia DR2 1849786481031300608
Gaia DR3
Gaia DR3 1849786481032616960
System
HAT-P-17
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 15.29 Earth years on a highly eccentric trajectory at a mean orbital distance of 5.6000 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.405
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Howard et al. 2012Instrument
HIRES Spectrometer
Publication
2012-04
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at W. M. Keck Observatory (12 shown).
Host System: HAT-P-17
Spectral Class
K-type orange
Effective Temperature
5,337 K — cooler than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.839 R☉
Stellar Mass
0.920 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.555 dex
Stellar density
2.199 g/cm³
Systemic radial velocity
20.31 km/s
Rotational v·sin i
0.84 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
10.796 mas
Total Proper Motion
150.284 mas/yr
PM Right Ascension
-80.40 mas/yr
PM Declination
-126.97 mas/yr
Galactic Cartesian (pc)
x = 0.702 · y = -0.500 · z = 0.507
Equatorial (J2000)
RA 324.53598° · Dec 30.48819°
Galactic ℓ, b
80.852° · -16.177°
Ecliptic λ, β
339.892° · 41.634°
HTM-20 index
-227908809
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