Key parameters at a glance
- A radius of 2.87 Earth radii
- A mass of 731.21 Earth masses
- Surface gravity around 88.77 g
- An orbital period of 14.128 days
- Semi-major axis 0.1190 AU
- Equilibrium temperature 739 K (466 °C)
- Distance from Earth 3,734.03 light-years
- Earth Similarity Index 0.165
- Travel time at Voyager 1 speed 65,849,608 years
2 siblings around Kepler-276
Kepler-276 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-276 b this | Sub-Neptune | 2.87 | 731.21 | 14.128 | 739 | 2014 |
| Kepler-276 c | Sub-Neptune | 2.90 | 16.60 | 31.884 | 563 | 2013 |
| Kepler-276 d | Sub-Neptune | 2.80 | 16.30 | 48.648 | 489 | 2013 |
Kepler-276 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#659of 1978
top 33.3%
This planet
2.87R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-276 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.87 | 11.21 |
| Mass (M⊕) | 1.00 | 731.21 | 317.83 |
| Density (g/cm³) | 5.51 | 73.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 88.77 | 2.53 |
| Insolation (S⊕) | 1.00 | 58.59 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 731.209 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 138213510
Gaia DR2
Gaia DR2 2052304325169514880
Gaia DR3
Gaia DR3 2052304325169514880
System
Kepler-276
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 14.13 Earth days (3.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1190 AU.
Transit Fingerprint
Depth
0.063 %
Duration
3.733 h
Impact parameter b
0.850
Rp / R★
0.025630
Transit midpoint (BJD)
2,454,975.8952
Photometric dip
Transit produces a flux drop of 629 ppm lasting ≈ 3.73 h.
Extended Orbital Architecture
Planet / star radius ratio
0.025630
Semi-major axis / stellar radius
20.588
Impact parameter (b)
0.850
Transit mid-time (BJD)
2,454,975.8952
Angular separation (arcsec)
0.10400
Eq. Temperature
739K
(466 °C)
Insolation (S⊕)
58.59
Earth = 1.00
Earth Similarity (ESI)
0.165
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-276
Spectral Class
F-type yellow-white
Effective Temperature
6,105 K — hotter than the Sun (5,778 K)
Estimated Age
0.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.046 R☉
Stellar Mass
0.845 M☉
Metallicity [Fe/H]
-0.29
Extended Stellar Properties
Surface gravity (log g)
4.453 dex
Stellar density
1.270 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.846 mas
Total Proper Motion
8.070 mas/yr
PM Right Ascension
8.00 mas/yr
PM Declination
1.10 mas/yr
Galactic Cartesian (pc)
x = 0.311 · y = -0.712 · z = 0.630
Equatorial (J2000)
RA 293.56820° · Dec 39.03631°
Galactic ℓ, b
72.306° · 9.133°
Ecliptic λ, β
307.638° · 59.434°
HTM-20 index
1302657699
Similar Worlds
Kepler-880 c
Sub-Neptune · F-type yellow-white
Radius 2.87 R⊕ · 1,961.3 ly
KOI-351 d
Sub-Neptune · F-type yellow-white
Radius 2.87 R⊕ · 2,766.6 ly
TOI-1052 b
Sub-Neptune · F-type yellow-white
Radius 2.87 R⊕ · 423.4 ly
KOI-351 f
Sub-Neptune · F-type yellow-white
Radius 2.88 R⊕ · 2,766.6 ly
Kepler-1723 b
Sub-Neptune · F-type yellow-white
Radius 2.88 R⊕ · 2,646.0 ly
Kepler-1666 b
Sub-Neptune · F-type yellow-white
Radius 2.88 R⊕ · 4,498.9 ly