Key parameters at a glance
- A radius of 18.42 Earth radii
- A mass of 546.66 Earth masses
- Surface gravity around 1.61 g
- An orbital period of 2.627 days
- Semi-major axis 0.0439 AU
- Equilibrium temperature 2,090 K (1817 °C)
- Distance from Earth 2,165.13 light-years
- Earth Similarity Index 0.050
- Travel time at Voyager 1 speed 38,182,143 years
K2-260 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#57of 1771
top 3.2%
This planet
18.42R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | K2-260 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 18.42 | 11.21 |
| Mass (M⊕) | 1.00 | 546.66 | 317.83 |
| Density (g/cm³) | 5.51 | 0.48 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.61 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,520.03 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 546.665 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 451.319 M⊕ | Lower bound from radial-velocity fitting. |
| Computed mass | 451.440 M⊕ | Model-computed mass (e.g. from mass-radius relation). |
Star Catalogue Identifiers
TIC
TIC 293612446
Gaia DR2
Gaia DR2 3394923127797114496
Gaia DR3
Gaia DR3 3394923127797114496
System
K2-260
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.63 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0439 AU.
Transit Fingerprint
Depth
0.925 %
Duration
4.199 h
Impact parameter b
0.080
Rp / R★
0.096170
Transit midpoint (BJD)
2,457,894.2849
Photometric dip
Transit produces a flux drop of 9,250 ppm lasting ≈ 4.20 h.
Extended Orbital Architecture
Planet / star radius ratio
0.096170
Semi-major axis / stellar radius
5.370
Impact parameter (b)
0.080
RV semi-amplitude (K)
182.000 m/s
Transit mid-time (BJD)
2,457,894.2849
Long. of periastron (ω)
-72.00°
Angular separation (arcsec)
0.06620
Eq. Temperature
2,090K
(1817 °C)
Insolation (S⊕)
2,520.03
Earth = 1.00
Earth Similarity (ESI)
0.050
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Johnson et al. 2018Instrument
Kepler CCD Array
Publication
2018-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at K2 (12 shown).
Host System: K2-260
Spectral Class
F-type yellow-white
Effective Temperature
6,860 K — hotter than the Sun (5,778 K)
Estimated Age
0.65 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.755 R☉
Stellar Mass
1.637 M☉
Metallicity [Fe/H]
0.33
Extended Stellar Properties
Surface gravity (log g)
4.161 dex
Stellar density
0.424 g/cm³
Systemic radial velocity
29.07 km/s
Rotational v·sin i
16.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
1.479 mas
Total Proper Motion
6.082 mas/yr
PM Right Ascension
0.67 mas/yr
PM Declination
-6.05 mas/yr
Galactic Cartesian (pc)
x = 0.217 · y = 0.932 · z = 0.290
Equatorial (J2000)
RA 76.86733° · Dec 16.86769°
Galactic ℓ, b
185.343° · -13.942°
Ecliptic λ, β
77.368° · -5.998°
HTM-20 index
1308930860
Similar Worlds
WASP-187 b
Gas Giant · F-type yellow-white
Radius 18.38 R⊕ · 1,211.4 ly
HATS-31 b
Gas Giant · F-type yellow-white
Radius 18.38 R⊕ · 2,524.4 ly
NGTS-33 b
Gas Giant · F-type yellow-white
Radius 18.38 R⊕ · 1,428.1 ly
HAT-P-60 b
Gas Giant · F-type yellow-white
Radius 18.28 R⊕ · 760.7 ly
WASP-90 b
Gas Giant · F-type yellow-white
Radius 18.27 R⊕ · 1,521.3 ly
TOI-2886 b
Gas Giant · F-type yellow-white
Radius 18.64 R⊕ · 1,349.2 ly