Key parameters at a glance
- A radius of 13.00 Earth radii
- A mass of 1,150.54 Earth masses
- Surface gravity around 6.81 g
- An orbital period of 2,149.000 days
- Semi-major axis 3.5840 AU
- Distance from Earth 289.64 light-years
- Earth Similarity Index 0.411
- Travel time at Voyager 1 speed 5,107,834 years
1 sibling around HD 1605
HD 1605 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 1605 b | Gas Giant | 13.80 | 296.85 | 577.200 | — | 2015 |
| HD 1605 c this | Gas Giant | 13.00 | 1,150.54 | 2,149.000 | — | 2015 |
HD 1605 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#960of 1771
top 54.2%
This planet
13.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 1605 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.00 | 11.21 |
| Mass (M⊕) | 1.00 | 1,150.54 | 317.83 |
| Density (g/cm³) | 5.51 | 2.88 | 1.33 |
| Surface Gravity (g) | 1.00 | 6.81 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 1,150.545 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 1605
HIP
HIP 1640
TIC
TIC 57983992
Gaia DR2
Gaia DR2 2862328869351558272
Gaia DR3
Gaia DR3 2862328869351558272
System
HD 1605
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 5.88 Earth years on a nearly circular orbit at a mean orbital distance of 3.5840 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.411
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Harakawa et al. 2015Instrument
Multiple Instruments
Publication
2015-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2015 at Multiple Observatories (8 shown).
Host System: HD 1605
Spectral Class
K-type orange
Effective Temperature
4,915 K — cooler than the Sun (5,778 K)
Estimated Age
4.36 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
3.490 R☉
Stellar Mass
1.330 M☉
Metallicity [Fe/H]
0.22
Extended Stellar Properties
Surface gravity (log g)
3.400 dex
Systemic radial velocity
9.93 km/s
Rotational v·sin i
0.54 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
11.232 mas
Total Proper Motion
103.484 mas/yr
PM Right Ascension
84.84 mas/yr
PM Declination
59.26 mas/yr
Galactic Cartesian (pc)
x = 0.854 · y = 0.077 · z = 0.515
Equatorial (J2000)
RA 5.13175° · Dec 30.97506°
Galactic ℓ, b
115.167° · -31.430°
Ecliptic λ, β
17.851° · 26.212°
HTM-20 index
1815261676
Observation Record
Photometric series
1
RV measurements
2
Stellar spectra
2
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