Key parameters at a glance
- A radius of 1.98 Earth radii
- A mass of 4.58 Earth masses
- Surface gravity around 1.17 g
- An orbital period of 8.015 days
- Semi-major axis 0.0730 AU
- Equilibrium temperature 865 K (592 °C)
- Distance from Earth 2,328.64 light-years
- Earth Similarity Index 0.318
- Travel time at Voyager 1 speed 41,065,501 years
1 sibling around Kepler-273
Kepler-273 c 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 |
|---|---|---|---|---|---|---|
| Kepler-273 b | Super-Earth | 1.50 | 2.86 | 2.937 | 1,209 | 2014 |
| Kepler-273 c this | Super-Earth | 1.98 | 4.58 | 8.015 | 865 | 2014 |
Kepler-273 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#25of 1176
top 2.0%
This planet
1.98R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-273 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.98 | 11.21 |
| Mass (M⊕) | 1.00 | 4.58 | 317.83 |
| Density (g/cm³) | 5.51 | 3.24 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 74.89 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 159726559
Gaia DR2
Gaia DR2 2129193070214982016
Gaia DR3
Gaia DR3 2129193070214982016
System
Kepler-273
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.01 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0730 AU.
Transit Fingerprint
Depth
0.036 %
Duration
3.379 h
Impact parameter b
0.940
Rp / R★
0.016700
Transit midpoint (BJD)
2,454,967.8320
Photometric dip
Transit produces a flux drop of 363 ppm lasting ≈ 3.38 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016700
Semi-major axis / stellar radius
16.020
Impact parameter (b)
0.940
Transit mid-time (BJD)
2,454,967.8320
Angular separation (arcsec)
0.10200
Eq. Temperature
865K
(592 °C)
Insolation (S⊕)
74.89
Earth = 1.00
Earth Similarity (ESI)
0.318
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-273
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,626 K — cooler than the Sun (5,778 K)
Estimated Age
10.47 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.815 R☉
Stellar Mass
0.756 M☉
Metallicity [Fe/H]
-0.28
Extended Stellar Properties
Surface gravity (log g)
4.514 dex
Stellar density
1.670 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.372 mas
Total Proper Motion
25.216 mas/yr
PM Right Ascension
-7.73 mas/yr
PM Declination
-24.00 mas/yr
Galactic Cartesian (pc)
x = 0.245 · y = -0.627 · z = 0.740
Equatorial (J2000)
RA 291.30215° · Dec 47.69766°
Galactic ℓ, b
79.503° · 14.436°
Ecliptic λ, β
311.012° · 68.126°
HTM-20 index
-244216985
Similar Worlds
Kepler-1336 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.98 R⊕ · 3,674.6 ly
Kepler-85 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.98 R⊕ · 2,495.2 ly
Kepler-1144 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.99 R⊕ · 3,720.0 ly
Kepler-181 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.99 R⊕ · 1,987.2 ly
Kepler-1133 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.97 R⊕ · 2,456.4 ly
Kepler-1457 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.99 R⊕ · 2,902.4 ly