Key parameters at a glance
- A radius of 2.32 Earth radii
- A mass of 5.99 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 7.066 days
- Semi-major axis 0.0591 AU
- Distance from Earth 589.35 light-years
- Earth Similarity Index 0.731
- Travel time at Voyager 1 speed 10,393,259 years
- Almost certainly tidally locked to its host star given the close orbit
K2-69 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1469of 1978
top 74.2%
This planet
2.32R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-69 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.32 | 11.21 |
| Mass (M⊕) | 1.00 | 5.99 | 317.83 |
| Density (g/cm³) | 5.51 | 2.64 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 17.90 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 39928614
Gaia DR2
Gaia DR2 2614926005638892032
Gaia DR3
Gaia DR3 2614926005638892032
System
K2-69
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.07 Earth days (1.9% of a terrestrial year) at a mean orbital distance of 0.0591 AU.
Transit Fingerprint
Depth
0.221 %
Duration
1.620 h
Impact parameter b
0.570
Rp / R★
0.042800
Transit midpoint (BJD)
2,456,982.7825
Photometric dip
Transit produces a flux drop of 2,210 ppm lasting ≈ 1.62 h.
Extended Orbital Architecture
Planet / star radius ratio
0.042800
Semi-major axis / stellar radius
27.600
Impact parameter (b)
0.570
Transit mid-time (BJD)
2,456,982.7825
Angular separation (arcsec)
0.32700
Eq. Temperature
—
Insolation (S⊕)
17.90
Earth = 1.00
Earth Similarity (ESI)
0.731
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water). Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Crossfield et al. 2016Instrument
Kepler CCD Array
Publication
2016-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at K2 (12 shown).
Host System: K2-69
Spectral Class
K-type orange
Effective Temperature
4,127 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.491 R☉
Stellar Mass
0.551 M☉
Metallicity [Fe/H]
—
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
5.506 mas
Total Proper Motion
39.132 mas/yr
PM Right Ascension
26.66 mas/yr
PM Declination
-28.65 mas/yr
Galactic Cartesian (pc)
x = 0.897 · y = -0.404 · z = -0.182
Equatorial (J2000)
RA 335.75968° · Dec -10.48868°
Galactic ℓ, b
51.183° · -51.351°
Ecliptic λ, β
333.713° · -0.369°
HTM-20 index
939942667
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