Key parameters at a glance
- A radius of 2.57 Earth radii
- A mass of 11.00 Earth masses
- Surface gravity around 1.67 g
- An orbital period of 42.950 days
- Semi-major axis 0.2324 AU
- Equilibrium temperature 487 K (214 °C)
- Distance from Earth 2,071.56 light-years
- Earth Similarity Index 0.472
- Travel time at Voyager 1 speed 36,532,021 years
2 siblings around Kepler-549
Kepler-549 b 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 this | Sub-Neptune | 2.57 | 11.00 | 42.950 | 487 | 2016 |
| Kepler-549 c | Sub-Neptune | 2.93 | 8.91 | 117.040 | 349 | 2016 |
Kepler-549 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1074of 1978
top 54.2%
This planet
2.57R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-549 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.57 | 11.21 |
| Mass (M⊕) | 1.00 | 11.00 | 317.83 |
| Density (g/cm³) | 5.51 | 1.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.67 | 2.53 |
| Insolation (S⊕) | 1.00 | 9.55 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 11.000 M⊕ | Direct mass measurement (not derived). |
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 42.95 Earth days (11.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2324 AU.
Transit Fingerprint
Depth
0.096 %
Duration
5.347 h
Impact parameter b
0.758
Rp / R★
0.028486
Transit midpoint (BJD)
2,454,986.7376
Photometric dip
Transit produces a flux drop of 959 ppm lasting ≈ 5.35 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028486
Semi-major axis / stellar radius
62.260
Impact parameter (b)
0.758
Transit mid-time (BJD)
2,454,986.7376
Angular separation (arcsec)
0.36600
Eq. Temperature
487K
(214 °C)
Insolation (S⊕)
9.55
Earth = 1.00
Earth Similarity (ESI)
0.472
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
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-1549 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.57 R⊕ · 2,619.2 ly
Kepler-1991 c
Sub-Neptune · G-type yellow (Sun-like)
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Kepler-313 c
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Radius 2.57 R⊕ · 3,520.5 ly
Kepler-879 b
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K2-248 b
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Kepler-203 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.57 R⊕ · 2,293.9 ly