Key parameters at a glance
- A radius of 3.10 Earth radii
- A mass of 9.80 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 17.317 days
- Semi-major axis 0.1054 AU
- Equilibrium temperature 454 K (181 °C)
- Distance from Earth 2,351.67 light-years
- Earth Similarity Index 0.496
- Travel time at Voyager 1 speed 41,471,748 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-749 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#433of 1978
top 21.8%
This planet
3.10R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-749 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.10 | 11.21 |
| Mass (M⊕) | 1.00 | 9.80 | 317.83 |
| Density (g/cm³) | 5.51 | 1.81 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 24.63 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 269263934
Gaia DR2
Gaia DR2 2076090506891080704
Gaia DR3
Gaia DR3 2076090506891080704
System
Kepler-749
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 17.32 Earth days (4.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1054 AU.
Transit Fingerprint
Depth
0.147 %
Duration
3.160 h
Impact parameter b
0.491
Rp / R★
0.038366
Transit midpoint (BJD)
2,454,975.3578
Photometric dip
Transit produces a flux drop of 1,473 ppm lasting ≈ 3.16 h.
Extended Orbital Architecture
Planet / star radius ratio
0.038366
Semi-major axis / stellar radius
38.300
Impact parameter (b)
0.491
Transit mid-time (BJD)
2,454,975.3578
Angular separation (arcsec)
0.14600
Eq. Temperature
454K
(181 °C)
Insolation (S⊕)
24.63
Earth = 1.00
Earth Similarity (ESI)
0.496
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-749
Spectral Class
K-type orange
Effective Temperature
5,009 K — cooler than the Sun (5,778 K)
Estimated Age
4.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.750 R☉
Stellar Mass
0.790 M☉
Metallicity [Fe/H]
-0.11
Extended Stellar Properties
Surface gravity (log g)
4.590 dex
Stellar density
3.546 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.360 mas
Total Proper Motion
37.174 mas/yr
PM Right Ascension
12.53 mas/yr
PM Declination
35.00 mas/yr
Galactic Cartesian (pc)
x = 0.359 · y = -0.625 · z = 0.693
Equatorial (J2000)
RA 299.89733° · Dec 43.90407°
Galactic ℓ, b
78.935° · 7.372°
Ecliptic λ, β
320.383° · 62.213°
HTM-20 index
1713198132
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