Key parameters at a glance
- A radius of 2.63 Earth radii
- A mass of 24.50 Earth masses
- Surface gravity around 3.54 g
- An orbital period of 16.984 days
- Semi-major axis 0.1300 AU
- Equilibrium temperature 795 K (522 °C)
- Distance from Earth 372.77 light-years
- Earth Similarity Index 0.323
- Travel time at Voyager 1 speed 6,573,860 years
K2-292 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#969of 1978
top 48.9%
This planet
2.63R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-292 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.63 | 11.21 |
| Mass (M⊕) | 1.00 | 24.50 | 317.83 |
| Density (g/cm³) | 5.51 | 7.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.54 | 2.53 |
| Insolation (S⊕) | 1.00 | 67.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 24.500 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 119130
TIC
TIC 743941
Gaia DR2
Gaia DR2 3616931735377523712
Gaia DR3
Gaia DR3 3616931735377523712
System
K2-292
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.98 Earth days (4.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1300 AU.
Transit Fingerprint
Duration
3.660 h
Impact parameter b
0.680
Rp / R★
0.022000
Transit midpoint (BJD)
2,458,180.2842
Extended Orbital Architecture
Planet / star radius ratio
0.022000
Semi-major axis / stellar radius
25.900
Impact parameter (b)
0.680
RV semi-amplitude (K)
6.100 m/s
Transit mid-time (BJD)
2,458,180.2842
Long. of periastron (ω)
104.00°
Angular separation (arcsec)
1.14000
Eq. Temperature
795K
(522 °C)
Insolation (S⊕)
67.00
Earth = 1.00
Earth Similarity (ESI)
0.323
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Luque et al. 2019Instrument
Kepler CCD Array
Publication
2019-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2019 at K2 (12 shown).
Host System: K2-292
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,725 K — cooler than the Sun (5,778 K)
Estimated Age
6.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.090 R☉
Stellar Mass
1.000 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.330 dex
Stellar density
1.140 g/cm³
Systemic radial velocity
-28.18 km/s
Rotational v·sin i
4.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
8.721 mas
Total Proper Motion
88.215 mas/yr
PM Right Ascension
-88.20 mas/yr
PM Declination
1.67 mas/yr
Galactic Cartesian (pc)
x = -0.890 · y = -0.422 · z = -0.173
Equatorial (J2000)
RA 205.37588° · Dec -9.94607°
Galactic ℓ, b
322.755° · 50.989°
Ecliptic λ, β
207.126° · 0.541°
HTM-20 index
1026459253
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