Key parameters at a glance
- A radius of 1.71 Earth radii
- A mass of 7.34 Earth masses
- Surface gravity around 2.52 g
- An orbital period of 2.369 days
- Semi-major axis 0.0336 AU
- Equilibrium temperature 1,366 K (1093 °C)
- Distance from Earth 452.28 light-years
- Earth Similarity Index 0.194
- Travel time at Voyager 1 speed 7,976,024 years
K2-265 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#398of 1176
top 33.8%
This planet
1.71R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-265 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.71 | 11.21 |
| Mass (M⊕) | 1.00 | 7.34 | 317.83 |
| Density (g/cm³) | 5.51 | 7.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.52 | 2.53 |
| Insolation (S⊕) | 1.00 | 592.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 7.342 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 146364192
Gaia DR2
Gaia DR2 2597119620985658496
Gaia DR3
Gaia DR3 2597119620985658496
System
K2-265
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.37 Earth days (0.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0336 AU.
Transit Fingerprint
Depth
0.029 %
Duration
2.309 h
Impact parameter b
0.440
Rp / R★
0.016950
Transit midpoint (BJD)
2,457,017.1808
Photometric dip
Transit produces a flux drop of 287 ppm lasting ≈ 2.31 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016950
Semi-major axis / stellar radius
7.860
Impact parameter (b)
0.440
RV semi-amplitude (K)
3.870 m/s
Transit mid-time (BJD)
2,457,017.1808
Long. of periastron (ω)
-57.00°
Angular separation (arcsec)
0.24200
Eq. Temperature
1,366K
(1093 °C)
Insolation (S⊕)
592.00
Earth = 1.00
Earth Similarity (ESI)
0.194
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
Lam et al. 2018Instrument
Kepler CCD Array
Publication
2018-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at K2 (12 shown).
Host System: K2-265
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,420 K — cooler than the Sun (5,778 K)
Estimated Age
7.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.920 R☉
Stellar Mass
0.901 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.465 dex
Stellar density
1.630 g/cm³
Systemic radial velocity
-18.19 km/s
Rotational v·sin i
1.80 km/s
Activity index (log R'HK)
-4.878
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
7.183 mas
Total Proper Motion
38.164 mas/yr
PM Right Ascension
30.20 mas/yr
PM Declination
-23.34 mas/yr
Galactic Cartesian (pc)
x = 0.921 · y = -0.299 · z = -0.250
Equatorial (J2000)
RA 342.03165° · Dec -14.49478°
Galactic ℓ, b
50.422° · -58.655°
Ecliptic λ, β
337.916° · -6.363°
HTM-20 index
-1623475930
Similar Worlds
K2-58 d
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 592.8 ly
Kepler-1046 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 2,353.3 ly
Kepler-414 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 1,348.5 ly
Kepler-221 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 1,256.5 ly
Kepler-69 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 2,383.0 ly
Kepler-60 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 3,343.4 ly