Key parameters at a glance
- A radius of 1.57 Earth radii
- A mass of 3.09 Earth masses
- Surface gravity around 1.25 g
- An orbital period of 15.368 days
- Semi-major axis 0.0970 AU
- Equilibrium temperature 332 K (59 °C)
- Distance from Earth 621.00 light-years
- Earth Similarity Index 0.817
- Travel time at Voyager 1 speed 10,951,410 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-249
Kepler-249 d 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-249 b | Rocky Terrestrial | 1.09 | 1.32 | 3.307 | 554 | 2014 |
| Kepler-249 c | Super-Earth | 1.51 | 2.89 | 7.114 | 429 | 2014 |
| Kepler-249 d this | Super-Earth | 1.57 | 3.09 | 15.368 | 332 | 2014 |
Kepler-249 d Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#618of 1176
top 52.5%
This planet
1.57R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-249 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.57 | 11.21 |
| Mass (M⊕) | 1.00 | 3.09 | 317.83 |
| Density (g/cm³) | 5.51 | 4.39 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 4.47 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 272942100
Gaia DR2
Gaia DR2 2078807228323035008
Gaia DR3
Gaia DR3 2078807228323035008
System
Kepler-249
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.37 Earth days (4.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0970 AU.
Transit Fingerprint
Depth
0.076 %
Duration
2.697 h
Impact parameter b
0.900
Rp / R★
0.026278
Transit midpoint (BJD)
2,454,980.3889
Photometric dip
Transit produces a flux drop of 756 ppm lasting ≈ 2.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026278
Semi-major axis / stellar radius
48.380
Impact parameter (b)
0.900
Transit mid-time (BJD)
2,454,980.3889
Angular separation (arcsec)
0.50900
Eq. Temperature
332K
(59 °C)
Insolation (S⊕)
4.47
Earth = 1.00
Earth Similarity (ESI)
0.817
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-249
Spectral Class
M-type red dwarf
Effective Temperature
3,568 K — cooler than the Sun (5,778 K)
Estimated Age
3.86 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.482 R☉
Stellar Mass
0.510 M☉
Metallicity [Fe/H]
-0.34
Extended Stellar Properties
Surface gravity (log g)
4.777 dex
Stellar density
5.345 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
5.223 mas
Total Proper Motion
37.825 mas/yr
PM Right Ascension
33.52 mas/yr
PM Declination
17.52 mas/yr
Galactic Cartesian (pc)
x = 0.328 · y = -0.645 · z = 0.690
Equatorial (J2000)
RA 296.98530° · Dec 43.65860°
Galactic ℓ, b
77.658° · 9.071°
Ecliptic λ, β
316.008° · 62.853°
HTM-20 index
1531327809
Similar Worlds
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Kepler-445 b
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Kepler-49 e
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 1,015.1 ly