Key parameters at a glance
- A radius of 13.45 Earth radii
- A mass of 174.49 Earth masses
- Surface gravity around 0.96 g
- An orbital period of 8.407 days
- Semi-major axis 0.0854 AU
- Equilibrium temperature 1,566 K (1293 °C)
- Distance from Earth 2,865.05 light-years
- Earth Similarity Index 0.074
- Travel time at Voyager 1 speed 50,525,192 years
- Almost certainly tidally locked to its host star given the close orbit
K2-97 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#724of 1771
top 40.8%
This planet
13.45R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | K2-97 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.45 | 11.21 |
| Mass (M⊕) | 1.00 | 174.49 | 317.83 |
| Density (g/cm³) | 5.51 | 0.39 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.96 | 2.53 |
| Insolation (S⊕) | 1.00 | 114.15 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 174.488 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 366568760
Gaia DR2
Gaia DR2 600859258922054272
Gaia DR3
Gaia DR3 600859258922054272
System
K2-97
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.41 Earth days (2.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0854 AU.
Transit Fingerprint
Depth
0.089 %
Duration
6.271 h
Impact parameter b
0.895
Rp / R★
0.029800
Transit midpoint (BJD)
2,457,722.1447
Photometric dip
Transit produces a flux drop of 891 ppm lasting ≈ 6.27 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029800
Semi-major axis / stellar radius
4.440
Impact parameter (b)
0.895
RV semi-amplitude (K)
48.700 m/s
Transit mid-time (BJD)
2,457,722.1447
Long. of periastron (ω)
68.40°
Angular separation (arcsec)
0.09720
Eq. Temperature
1,566K
(1293 °C)
Insolation (S⊕)
114.15
Earth = 1.00
Earth Similarity (ESI)
0.074
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
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
Grunblatt et al. 2016Instrument
Kepler CCD Array
Publication
2016-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at K2 (12 shown).
Host System: K2-97
Spectral Class
K-type orange
Effective Temperature
4,673 K — cooler than the Sun (5,778 K)
Estimated Age
7.50 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
4.140 R☉
Stellar Mass
1.170 M☉
Metallicity [Fe/H]
0.33
Extended Stellar Properties
Surface gravity (log g)
3.276 dex
Stellar density
0.024 g/cm³
Systemic radial velocity
17.09 km/s
Rotational v·sin i
2.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
1.109 mas
Total Proper Motion
6.898 mas/yr
PM Right Ascension
-1.28 mas/yr
PM Declination
-6.78 mas/yr
Galactic Cartesian (pc)
x = -0.601 · y = 0.776 · z = 0.188
Equatorial (J2000)
RA 127.76284° · Dec 10.84756°
Galactic ℓ, b
214.288° · 26.993°
Ecliptic λ, β
127.377° · -7.827°
HTM-20 index
944910546
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