Key parameters at a glance
- A radius of 2.93 Earth radii
- A mass of 8.91 Earth masses
- Surface gravity around 1.04 g
- An orbital period of 117.040 days
- Semi-major axis 0.4533 AU
- Equilibrium temperature 349 K (76 °C)
- Distance from Earth 2,071.56 light-years
- Earth Similarity Index 0.628
- Travel time at Voyager 1 speed 36,532,021 years
2 siblings around Kepler-549
Kepler-549 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-549 d | Neptune-like | 4.20 | 16.40 | 24.615 | 586 | 2023 |
| Kepler-549 b | Sub-Neptune | 2.57 | 11.00 | 42.950 | 487 | 2016 |
| Kepler-549 c this | Sub-Neptune | 2.93 | 8.91 | 117.040 | 349 | 2016 |
Kepler-549 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#585of 1978
top 29.5%
This planet
2.93R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-549 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.93 | 11.21 |
| Mass (M⊕) | 1.00 | 8.91 | 317.83 |
| Density (g/cm³) | 5.51 | 1.95 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.04 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.51 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164455792
Gaia DR2
Gaia DR2 2107622335702262400
Gaia DR3
Gaia DR3 2107622335702262400
System
Kepler-549
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 117.04 Earth days (32.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4533 AU.
Transit Fingerprint
Depth
0.077 %
Duration
8.545 h
Impact parameter b
0.613
Rp / R★
0.032021
Transit midpoint (BJD)
2,455,078.6162
Photometric dip
Transit produces a flux drop of 770 ppm lasting ≈ 8.55 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032021
Semi-major axis / stellar radius
132.100
Impact parameter (b)
0.613
Transit mid-time (BJD)
2,455,078.6162
Angular separation (arcsec)
0.71400
Eq. Temperature
349K
(76 °C)
Insolation (S⊕)
2.51
Earth = 1.00
Earth Similarity (ESI)
0.628
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-549
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,360 K — cooler than the Sun (5,778 K)
Estimated Age
4.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.840 R☉
Stellar Mass
0.880 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.540 dex
Stellar density
1.620 g/cm³
Systemic radial velocity
4.33 km/s
Rotational v·sin i
5.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.546 mas
Total Proper Motion
6.864 mas/yr
PM Right Ascension
1.93 mas/yr
PM Declination
-6.59 mas/yr
Galactic Cartesian (pc)
x = 0.153 · y = -0.661 · z = 0.734
Equatorial (J2000)
RA 283.02285° · Dec 47.26114°
Galactic ℓ, b
76.896° · 19.462°
Ecliptic λ, β
295.928° · 69.531°
HTM-20 index
1564641347
Similar Worlds
Kepler-708 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.93 R⊕ · 4,547.3 ly
HD 96700 b
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Radius 2.93 R⊕ · 82.9 ly
TOI-451 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.93 R⊕ · 403.6 ly
Kepler-736 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.93 R⊕ · 3,279.3 ly
Kepler-1052 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.93 R⊕ · 3,077.1 ly
Kepler-221 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.93 R⊕ · 1,256.5 ly