Key parameters at a glance
- A radius of 1.43 Earth radii
- A mass of 2.63 Earth masses
- Surface gravity around 1.29 g
- An orbital period of 0.663 days
- Semi-major axis 0.0141 AU
- Equilibrium temperature 1,681 K (1408 °C)
- Distance from Earth 2,627.39 light-years
- Earth Similarity Index 0.168
- Travel time at Voyager 1 speed 46,333,999 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1259 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#864of 1176
top 73.4%
This planet
1.43R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1259 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.43 | 11.21 |
| Mass (M⊕) | 1.00 | 2.63 | 317.83 |
| Density (g/cm³) | 5.51 | 4.94 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.29 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,460.58 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 273592350
Gaia DR2
Gaia DR2 2086307031492729856
Gaia DR3
Gaia DR3 2086307031492729856
System
Kepler-1259
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 15.9 hours long on a nearly circular orbit at a mean orbital distance of 0.0141 AU.
Transit Fingerprint
Depth
0.032 %
Duration
1.069 h
Impact parameter b
0.305
Rp / R★
0.017123
Transit midpoint (BJD)
2,454,964.9795
Photometric dip
Transit produces a flux drop of 323 ppm lasting ≈ 1.07 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017123
Semi-major axis / stellar radius
4.642
Impact parameter (b)
0.305
Transit mid-time (BJD)
2,454,964.9795
Angular separation (arcsec)
0.01750
Eq. Temperature
1,681K
(1408 °C)
Insolation (S⊕)
2,460.58
Earth = 1.00
Earth Similarity (ESI)
0.168
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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-1259
Spectral Class
K-type orange
Effective Temperature
5,053 K — cooler than the Sun (5,778 K)
Estimated Age
5.25 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.770 R☉
Stellar Mass
0.800 M☉
Metallicity [Fe/H]
-0.07
Extended Stellar Properties
Surface gravity (log g)
4.580 dex
Stellar density
4.304 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.213 mas
Total Proper Motion
10.029 mas/yr
PM Right Ascension
-8.18 mas/yr
PM Declination
-5.80 mas/yr
Galactic Cartesian (pc)
x = 0.319 · y = -0.603 · z = 0.731
Equatorial (J2000)
RA 297.84146° · Dec 46.96763°
Galactic ℓ, b
80.888° · 10.155°
Ecliptic λ, β
320.481° · 65.599°
HTM-20 index
1105893435
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