Key parameters at a glance
- A radius of 2.42 Earth radii
- A mass of 6.46 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 35.581 days
- Semi-major axis 0.1884 AU
- Equilibrium temperature 408 K (135 °C)
- Distance from Earth 637.44 light-years
- Earth Similarity Index 0.597
- Travel time at Voyager 1 speed 11,241,184 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1716 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1296of 1978
top 65.5%
This planet
2.42R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1716 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.42 | 11.21 |
| Mass (M⊕) | 1.00 | 6.46 | 317.83 |
| Density (g/cm³) | 5.51 | 2.49 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.30 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 273035189
Gaia DR2
Gaia DR2 2078735519547912832
Gaia DR3
Gaia DR3 2078735519547912832
System
Kepler-1716
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 35.58 Earth days (9.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1884 AU.
Transit Fingerprint
Depth
0.099 %
Duration
3.989 h
Impact parameter b
0.001
Rp / R★
0.027158
Transit midpoint (BJD)
2,455,022.0346
Photometric dip
Transit produces a flux drop of 988 ppm lasting ≈ 3.99 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027158
Semi-major axis / stellar radius
70.008
Impact parameter (b)
0.001
Transit mid-time (BJD)
2,455,022.0346
Angular separation (arcsec)
0.96400
Eq. Temperature
408K
(135 °C)
Insolation (S⊕)
6.30
Earth = 1.00
Earth Similarity (ESI)
0.597
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Primary reference
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-1716
Spectral Class
K-type orange
Effective Temperature
4,894 K — cooler than the Sun (5,778 K)
Estimated Age
7.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.684 R☉
Stellar Mass
0.753 M☉
Metallicity [Fe/H]
-0.24
Extended Stellar Properties
Surface gravity (log g)
4.637 dex
Stellar density
5.126 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
5.088 mas
Total Proper Motion
61.683 mas/yr
PM Right Ascension
-25.09 mas/yr
PM Declination
-56.35 mas/yr
Galactic Cartesian (pc)
x = 0.333 · y = -0.647 · z = 0.686
Equatorial (J2000)
RA 297.27172° · Dec 43.33306°
Galactic ℓ, b
77.473° · 8.731°
Ecliptic λ, β
316.143° · 62.472°
HTM-20 index
1513188697
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