Key parameters at a glance
- A radius of 2.59 Earth radii
- A mass of 7.20 Earth masses
- Surface gravity around 1.08 g
- An orbital period of 13.603 days
- Semi-major axis 0.0980 AU
- Equilibrium temperature 536 K (263 °C)
- Distance from Earth 1,096.70 light-years
- Earth Similarity Index 0.460
- Travel time at Voyager 1 speed 19,340,295 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around EPIC 212737443
EPIC 212737443 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| EPIC 212737443 b this | Sub-Neptune | 2.59 | 7.20 | 13.603 | 536 | 2019 |
| EPIC 212737443 c | Sub-Neptune | 2.69 | 7.70 | 65.550 | 316 | 2019 |
EPIC 212737443 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1055of 1978
top 53.3%
This planet
2.59R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | EPIC 212737443 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.59 | 11.21 |
| Mass (M⊕) | 1.00 | 7.20 | 317.83 |
| Density (g/cm³) | 5.51 | 2.29 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.08 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 670036
Gaia DR2
Gaia DR2 3630680754621236096
Gaia DR3
Gaia DR3 3630680754621236096
System
EPIC 212737443
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.60 Earth days (3.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0980 AU.
Transit Fingerprint
Depth
0.110 %
Duration
2.976 h
Impact parameter b
0.479
Rp / R★
0.035200
Transit midpoint (BJD)
2,457,234.9700
Photometric dip
Transit produces a flux drop of 1,100 ppm lasting ≈ 2.98 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035200
Semi-major axis / stellar radius
31.994
Impact parameter (b)
0.479
Transit mid-time (BJD)
2,457,234.9700
Angular separation (arcsec)
0.29100
Eq. Temperature
536K
(263 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.460
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
Herath et al. 2019Instrument
Kepler CCD Array
Publication
2019-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2019 at K2 (12 shown).
Host System: EPIC 212737443
Spectral Class
K-type orange
Effective Temperature
4,684 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.673 R☉
Stellar Mass
0.690 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.622 dex
Stellar density
3.190 g/cm³
Systemic radial velocity
-16.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 13 bands
Astrometric Data
Parallax
2.946 mas
Total Proper Motion
51.270 mas/yr
PM Right Ascension
-46.23 mas/yr
PM Declination
22.16 mas/yr
Galactic Cartesian (pc)
x = -0.905 · y = -0.407 · z = -0.127
Equatorial (J2000)
RA 204.22151° · Dec -7.31806°
Galactic ℓ, b
322.271° · 53.838°
Ecliptic λ, β
205.112° · 2.579°
HTM-20 index
-1155296478
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