Key parameters at a glance
- A radius of 2.01 Earth radii
- A mass of 4.70 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 4.422 days
- Semi-major axis 0.0471 AU
- Equilibrium temperature 729 K (456 °C)
- Distance from Earth 1,037.19 light-years
- Earth Similarity Index 0.377
- Travel time at Voyager 1 speed 18,290,829 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1105 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1940of 1978
top 98.0%
This planet
2.01R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1105 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.01 | 11.21 |
| Mass (M⊕) | 1.00 | 4.70 | 317.83 |
| Density (g/cm³) | 5.51 | 3.18 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 47.18 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 123231917
Gaia DR2
Gaia DR2 2116733198288204288
Gaia DR3
Gaia DR3 2116733198288204288
System
Kepler-1105
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.42 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0471 AU.
Transit Fingerprint
Depth
0.072 %
Duration
2.075 h
Impact parameter b
0.744
Rp / R★
0.026805
Transit midpoint (BJD)
2,454,965.1835
Photometric dip
Transit produces a flux drop of 717 ppm lasting ≈ 2.07 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026805
Semi-major axis / stellar radius
8.810
Impact parameter (b)
0.744
Transit mid-time (BJD)
2,454,965.1835
Angular separation (arcsec)
0.14800
Eq. Temperature
729K
(456 °C)
Insolation (S⊕)
47.18
Earth = 1.00
Earth Similarity (ESI)
0.377
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.
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-1105
Spectral Class
K-type orange
Effective Temperature
4,299 K — cooler than the Sun (5,778 K)
Estimated Age
8.71 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.680 R☉
Stellar Mass
0.710 M☉
Metallicity [Fe/H]
0.28
Extended Stellar Properties
Surface gravity (log g)
4.620 dex
Stellar density
0.662 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.116 mas
Total Proper Motion
11.899 mas/yr
PM Right Ascension
-1.42 mas/yr
PM Declination
11.81 mas/yr
Galactic Cartesian (pc)
x = 0.142 · y = -0.724 · z = 0.675
Equatorial (J2000)
RA 281.11176° · Dec 42.45497°
Galactic ℓ, b
71.616° · 19.137°
Ecliptic λ, β
289.760° · 65.134°
HTM-20 index
-1620806660
Similar Worlds
Kepler-415 c
Sub-Neptune · K-type orange
Radius 2.01 R⊕ · 1,730.2 ly
TOI-544 b
Sub-Neptune · K-type orange
Radius 2.02 R⊕ · 134.1 ly
Kepler-801 b
Sub-Neptune · K-type orange
Radius 2.00 R⊕ · 1,436.5 ly
Kepler-968 b
Sub-Neptune · K-type orange
Radius 2.00 R⊕ · 946.9 ly
Kepler-261 c
Sub-Neptune · K-type orange
Radius 2.00 R⊕ · 1,035.5 ly
K2-343 c
Sub-Neptune · K-type orange
Radius 2.02 R⊕ · 542.0 ly