Key parameters at a glance
- A radius of 2.11 Earth radii
- A mass of 5.10 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 56.056 days
- Semi-major axis 0.2320 AU
- Equilibrium temperature 265 K (-8 °C)
- Distance from Earth 903.06 light-years
- Earth Similarity Index 0.771
- Travel time at Voyager 1 speed 15,925,533 years
Kepler-705 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1806of 1978
top 91.3%
This planet
2.11R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-705 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.11 | 11.21 |
| Mass (M⊕) | 1.00 | 5.10 | 317.83 |
| Density (g/cm³) | 5.51 | 2.98 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.73 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122066949
Gaia DR2
Gaia DR2 2102244967931917184
Gaia DR3
Gaia DR3 2102244967931917184
System
Kepler-705
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 56.06 Earth days (15.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2320 AU.
Transit Fingerprint
Depth
0.185 %
Duration
4.595 h
Impact parameter b
0.018
Rp / R★
0.038247
Transit midpoint (BJD)
2,455,034.1656
Photometric dip
Transit produces a flux drop of 1,851 ppm lasting ≈ 4.60 h.
Extended Orbital Architecture
Planet / star radius ratio
0.038247
Semi-major axis / stellar radius
97.300
Impact parameter (b)
0.018
Transit mid-time (BJD)
2,455,034.1656
Angular separation (arcsec)
0.83800
Eq. Temperature
265K
(-8 °C)
Insolation (S⊕)
0.73
Earth = 1.00
Earth Similarity (ESI)
0.771
0 = alien, 1 = Earth-identical
Within the conservative habitable zone — surface water would be frozen.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-705
Spectral Class
K-type orange
Effective Temperature
3,722 K — cooler than the Sun (5,778 K)
Estimated Age
3.89 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.510 R☉
Stellar Mass
0.530 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.750 dex
Stellar density
4.558 g/cm³
Rotation period
20.09 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.584 mas
Total Proper Motion
21.160 mas/yr
PM Right Ascension
10.75 mas/yr
PM Declination
-18.22 mas/yr
Galactic Cartesian (pc)
x = 0.249 · y = -0.703 · z = 0.667
Equatorial (J2000)
RA 289.50856° · Dec 41.81202°
Galactic ℓ, b
73.450° · 13.132°
Ecliptic λ, β
303.264° · 63.016°
HTM-20 index
-1505099466
Similar Worlds
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K2-345 b
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HD 39194 d
Sub-Neptune · K-type orange
Radius 2.12 R⊕ · 86.1 ly