Key parameters at a glance
- A radius of 2.30 Earth radii
- A mass of 5.90 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 18.925 days
- Semi-major axis 0.1694 AU
- Equilibrium temperature 1,171 K (898 °C)
- Distance from Earth 3,034.74 light-years
- Earth Similarity Index 0.217
- Travel time at Voyager 1 speed 53,517,660 years
2 siblings around Kepler-770
Kepler-770 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-770 c | Rocky Terrestrial | 1.20 | 1.87 | 1.475 | 2,740 | 2016 |
| Kepler-770 d | Super-Earth | 1.40 | 2.54 | 4.152 | 1,941 | 2016 |
| Kepler-770 b this | Sub-Neptune | 2.30 | 5.90 | 18.925 | 1,171 | 2016 |
Kepler-770 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1499of 1978
top 75.7%
This planet
2.30R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-770 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.30 | 11.21 |
| Mass (M⊕) | 1.00 | 5.90 | 317.83 |
| Density (g/cm³) | 5.51 | 2.66 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 27.74 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 120891972
Gaia DR2
Gaia DR2 2099980386293545216
Gaia DR3
Gaia DR3 2099980386293545216
System
Kepler-770
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.93 Earth days (5.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1694 AU.
Transit Fingerprint
Depth
0.064 %
Duration
3.741 h
Impact parameter b
0.826
Rp / R★
0.023478
Transit midpoint (BJD)
2,454,982.4941
Photometric dip
Transit produces a flux drop of 641 ppm lasting ≈ 3.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023478
Semi-major axis / stellar radius
39.480
Impact parameter (b)
0.826
Transit mid-time (BJD)
2,454,982.4941
Angular separation (arcsec)
0.18200
Eq. Temperature
1,171K
(898 °C)
Insolation (S⊕)
27.74
Earth = 1.00
Earth Similarity (ESI)
0.217
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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-770
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,598 K — cooler than the Sun (5,778 K)
Estimated Age
4.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.920 R☉
Stellar Mass
0.940 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.490 dex
Stellar density
0.978 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
1.046 mas
Total Proper Motion
11.590 mas/yr
PM Right Ascension
5.86 mas/yr
PM Declination
-10.00 mas/yr
Galactic Cartesian (pc)
x = 0.223 · y = -0.752 · z = 0.621
Equatorial (J2000)
RA 286.49046° · Dec 38.37487°
Galactic ℓ, b
69.252° · 13.821°
Ecliptic λ, β
296.681° · 60.296°
HTM-20 index
803195646
Similar Worlds
Kepler-1052 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.30 R⊕ · 3,077.1 ly
Kepler-1073 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.30 R⊕ · 2,641.5 ly
K2-183 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.30 R⊕ · 1,073.2 ly
EPIC 212624936 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.30 R⊕ · 1,832.8 ly
K2-183 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.30 R⊕ · 1,073.2 ly
K2-138 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.30 R⊕ · 660.7 ly