Key parameters at a glance
- A radius of 2.08 Earth radii
- A mass of 4.98 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 14.133 days
- Semi-major axis 0.0964 AU
- Equilibrium temperature 655 K (382 °C)
- Distance from Earth 744.70 light-years
- Earth Similarity Index 0.414
- Travel time at Voyager 1 speed 13,132,823 years
- Almost certainly tidally locked to its host star given the close orbit
K2-274 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1846of 1978
top 93.3%
This planet
2.08R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-274 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.08 | 11.21 |
| Mass (M⊕) | 1.00 | 4.98 | 317.83 |
| Density (g/cm³) | 5.51 | 3.04 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 195193560
Gaia DR2
Gaia DR2 664406705976755712
Gaia DR3
Gaia DR3 664406705976755712
System
K2-274
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 14.13 Earth days (3.9% of a terrestrial year) at a mean orbital distance of 0.0964 AU.
Transit Fingerprint
Depth
0.097 %
Duration
3.648 h
Impact parameter b
0.340
Rp / R★
0.027300
Transit midpoint (BJD)
2,457,145.1113
Photometric dip
Transit produces a flux drop of 974 ppm lasting ≈ 3.65 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027300
Semi-major axis / stellar radius
29.680
Impact parameter (b)
0.340
Transit mid-time (BJD)
2,457,145.1113
Angular separation (arcsec)
0.42200
Eq. Temperature
655K
(382 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.414
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Livingston et al. 2018Instrument
Kepler CCD Array
Publication
2018-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at K2 (12 shown).
Host System: K2-274
Spectral Class
K-type orange
Effective Temperature
5,044 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.700 R☉
Stellar Mass
0.790 M☉
Metallicity [Fe/H]
-0.16
Extended Stellar Properties
Surface gravity (log g)
4.640 dex
Stellar density
2.989 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
4.353 mas
Total Proper Motion
30.469 mas/yr
PM Right Ascension
-15.66 mas/yr
PM Declination
-26.14 mas/yr
Galactic Cartesian (pc)
x = -0.593 · y = 0.725 · z = 0.349
Equatorial (J2000)
RA 129.28237° · Dec 20.39925°
Galactic ℓ, b
204.794° · 32.015°
Ecliptic λ, β
126.418° · 1.789°
HTM-20 index
-1542484808
Similar Worlds
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Sub-Neptune · K-type orange
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Kepler-900 b
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Kepler-934 b
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Kepler-988 b
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TOI-262 b
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Radius 2.07 R⊕ · 143.3 ly