Key parameters at a glance
- A radius of 8.08 Earth radii
- A mass of 298.76 Earth masses
- Surface gravity around 4.57 g
- An orbital period of 394.625 days
- Semi-major axis 1.1370 AU
- Equilibrium temperature 363 K (90 °C)
- Distance from Earth 2,681.44 light-years
- Earth Similarity Index 0.499
- Travel time at Voyager 1 speed 47,287,181 years
Kepler-849 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#151of 574
top 26.1%
This planet
8.08R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-849 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 8.08 | 11.21 |
| Mass (M⊕) | 1.00 | 298.76 | 317.83 |
| Density (g/cm³) | 5.51 | 3.09 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.57 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.86 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 298.759 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 417659078
Gaia DR2
Gaia DR2 2129512821938786176
Gaia DR3
Gaia DR3 2129512821938786176
System
Kepler-849
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 1.08 Earth years on a nearly circular orbit at a mean orbital distance of 1.1370 AU.
Transit Fingerprint
Depth
0.165 %
Duration
24.010 h
Impact parameter b
0.190
Rp / R★
0.040630
Transit midpoint (BJD)
2,455,010.8377
Photometric dip
Transit produces a flux drop of 1,651 ppm lasting ≈ 24.01 h.
Extended Orbital Architecture
Planet / star radius ratio
0.040630
Semi-major axis / stellar radius
134.000
Impact parameter (b)
0.190
RV semi-amplitude (K)
22.400 m/s
Transit mid-time (BJD)
2,455,010.8377
Long. of periastron (ω)
-74.00°
Angular separation (arcsec)
1.38000
Eq. Temperature
363K
(90 °C)
Insolation (S⊕)
2.86
Earth = 1.00
Earth Similarity (ESI)
0.499
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.
Radial velocity
Stellar wobble has been measured spectroscopically.
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-849
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,950 K — hotter than the Sun (5,778 K)
Estimated Age
4.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.822 R☉
Stellar Mass
1.259 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.016 dex
Stellar density
0.292 g/cm³
Systemic radial velocity
-28.54 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.188 mas
Total Proper Motion
6.320 mas/yr
PM Right Ascension
-1.88 mas/yr
PM Declination
-6.03 mas/yr
Galactic Cartesian (pc)
x = 0.236 · y = -0.619 · z = 0.749
Equatorial (J2000)
RA 290.85180° · Dec 48.52132°
Galactic ℓ, b
80.150° · 15.050°
Ecliptic λ, β
311.137° · 69.001°
HTM-20 index
345439804
Similar Worlds
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