Key parameters at a glance
- A radius of 1.40 Earth radii
- A mass of 2.54 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 86.829 days
- Semi-major axis 0.3006 AU
- Equilibrium temperature 212 K (-61 °C)
- Distance from Earth 865.89 light-years
- Earth Similarity Index 0.745
- Travel time at Voyager 1 speed 15,269,889 years
Context from the literature
Kepler-1229b is a confirmed super-Earth exoplanet, likely rocky, orbiting within the habitable zone of the red dwarf Kepler-1229, located about 870 light years from Earth in the constellation of Cygnus. It was discovered in 2016 by the Kepler space telescope. The exoplanet was found by using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured.
Excerpted from Wikipedia · full article
Kepler-1229 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#923of 1176
top 78.4%
This planet
1.40R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1229 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.40 | 11.21 |
| Mass (M⊕) | 1.00 | 2.54 | 317.83 |
| Density (g/cm³) | 5.51 | 5.09 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.52 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 273373582
Gaia DR2
Gaia DR2 2086316205543022336
Gaia DR3
Gaia DR3 2086316205543022336
System
Kepler-1229
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 86.83 Earth days (23.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3006 AU.
Transit Fingerprint
Depth
0.086 %
Duration
6.001 h
Impact parameter b
0.007
Rp / R★
0.024684
Transit midpoint (BJD)
2,455,022.2688
Photometric dip
Transit produces a flux drop of 857 ppm lasting ≈ 6.00 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024684
Semi-major axis / stellar radius
134.600
Impact parameter (b)
0.007
Transit mid-time (BJD)
2,455,022.2688
Angular separation (arcsec)
1.13000
Eq. Temperature
212K
(-61 °C)
Insolation (S⊕)
0.52
Earth = 1.00
Earth Similarity (ESI)
0.745
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-1229
Spectral Class
K-type orange
Effective Temperature
3,784 K — cooler than the Sun (5,778 K)
Estimated Age
3.72 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.510 R☉
Stellar Mass
0.540 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.750 dex
Stellar density
4.352 g/cm³
Rotation period
17.63 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.739 mas
Total Proper Motion
22.030 mas/yr
PM Right Ascension
21.62 mas/yr
PM Declination
-4.24 mas/yr
Galactic Cartesian (pc)
x = 0.315 · y = -0.605 · z = 0.731
Equatorial (J2000)
RA 297.48683° · Dec 46.99668°
Galactic ℓ, b
80.794° · 10.380°
Ecliptic λ, β
319.988° · 65.733°
HTM-20 index
1094729225
Similar Worlds
Kepler-1301 b
Super-Earth · K-type orange
Radius 1.40 R⊕ · 2,786.3 ly
K2-85 b
Super-Earth · K-type orange
Radius 1.40 R⊕ · 317.1 ly
Kepler-329 b
Super-Earth · K-type orange
Radius 1.40 R⊕ · 1,434.2 ly
Kepler-326 c
Super-Earth · K-type orange
Radius 1.40 R⊕ · 1,590.6 ly
Kepler-1145 b
Super-Earth · K-type orange
Radius 1.40 R⊕ · 2,256.9 ly
Kepler-716 c
Super-Earth · K-type orange
Radius 1.39 R⊕ · 2,071.1 ly