Key parameters at a glance
- A radius of 2.08 Earth radii
- A mass of 4.98 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 6.991 days
- Semi-major axis 0.0679 AU
- Equilibrium temperature 716 K (443 °C)
- Distance from Earth 1,590.09 light-years
- Earth Similarity Index 0.379
- Travel time at Voyager 1 speed 28,041,272 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-900 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1846of 1978
top 93.3%
This planet
2.08R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-900 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.08 | 11.21 |
| Mass (M⊕) | 1.00 | 4.98 | 317.83 |
| Density (g/cm³) | 5.51 | 3.04 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | 54.11 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 272278496
Gaia DR2
Gaia DR2 2080548957816447872
Gaia DR3
Gaia DR3 2080548957816447872
System
Kepler-900
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.99 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0679 AU.
Transit Fingerprint
Depth
0.056 %
Duration
2.212 h
Impact parameter b
0.851
Rp / R★
0.026111
Transit midpoint (BJD)
2,454,968.4626
Photometric dip
Transit produces a flux drop of 555 ppm lasting ≈ 2.21 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026111
Semi-major axis / stellar radius
13.880
Impact parameter (b)
0.851
Transit mid-time (BJD)
2,454,968.4626
Angular separation (arcsec)
0.13900
Eq. Temperature
716K
(443 °C)
Insolation (S⊕)
54.11
Earth = 1.00
Earth Similarity (ESI)
0.379
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-900
Spectral Class
K-type orange
Effective Temperature
4,836 K — cooler than the Sun (5,778 K)
Estimated Age
4.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.730 R☉
Stellar Mass
0.780 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
1.035 g/cm³
Systemic radial velocity
-18.32 km/s
Rotational v·sin i
5.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.023 mas
Total Proper Motion
7.553 mas/yr
PM Right Ascension
-2.98 mas/yr
PM Declination
-6.94 mas/yr
Galactic Cartesian (pc)
x = 0.301 · y = -0.612 · z = 0.731
Equatorial (J2000)
RA 296.17727° · Dec 46.99896°
Galactic ℓ, b
80.363° · 11.166°
Ecliptic λ, β
318.024° · 66.129°
HTM-20 index
-2015226318
Similar Worlds
Kepler-237 c
Sub-Neptune · K-type orange
Radius 2.08 R⊕ · 2,145.5 ly
Kepler-1195 b
Sub-Neptune · K-type orange
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K2-274 b
Sub-Neptune · K-type orange
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Kepler-934 b
Sub-Neptune · K-type orange
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Kepler-988 b
Sub-Neptune · K-type orange
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TOI-262 b
Sub-Neptune · K-type orange
Radius 2.07 R⊕ · 143.3 ly