Kepler-277

Kepler-277
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra[1]
Right ascension 19h 06m 19.95772s[2]
Declination +39° 04′ 37.8616″[2]
Apparent magnitude (V) 13.544[3]
Characteristics
Evolutionary stage Main sequence[citation needed]
Spectral type G1V[citation needed]
Astrometry
Radial velocity (Rv)−62.35±1.85[2] km/s
Proper motion (μ) RA: 5.818 mas/yr[2]
Dec.: 17.290 mas/yr[2]
Parallax (π)1.0406 ± 0.0106 mas[2]
Distance3,130 ± 30 ly
(961 ± 10 pc)
Absolute magnitude (MV)3.39[citation needed]
Details[3]
Mass1.1 M☉
Radius1.83166 R☉
Luminosity0.5679111 L☉
Temperature5914 K
Metallicity [Fe/H]0.100 dex
Age4.07 Gyr
Other designations
Kepler-277, KOI-1215, KIC 3939150, 2MASS J19061996+3904379[4]
Database references
SIMBADdata

Kepler-277 is a large yellow star about 961 ± 10 parsecs (3,134 ± 33 ly) away in the constellation of Lyra. It is 1.69 R☉ and 1.12 M☉, with a temperature of 5946 K, a metallicity of -0.315 [Fe/H], and an unknown age.[3] For comparison, the Sun has a temperature of 5778 K, a metallicity of 0.00 [Fe/H], and an age of about 4.5 billion years. The large radius in comparison to its mass and temperature suggest that Kepler-277 could be a subgiant star.

Planetary system

The Kepler-277 planetary system[3]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 87.3+41.7
−39.9 M🜨 		0.136 17.324 — — 2.92+0.73
−0.63 R🜨
c 64.2+18.1
−15.7 M🜨 		0.209 33.006 — — 3.36+0.83
−0.72 R🜨

Kepler-277b

Main article: Kepler-277b

Kepler-277b (KOI-1215.01) is the second most massive and third-largest rocky planet ever discovered,[improper synthesis?] with a mass close to that of Saturn. It was discovered in 2014. Kepler-277b orbits close to its host star, with one orbit lasting 17.324 days.[3]

Kepler-277c

Main article: Kepler-277c

Kepler-277c (KOI-1215.02) is the third most massive and second-largest rocky planet ever discovered,[improper synthesis?] with a mass about 64 times that of Earth. It was discovered in 2014. Kepler-277c orbits close to its host star, with one orbit lasting 33.006 days.[3]

See also

References

  1. ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c d e f "Kepler-277". NASA Exoplanet Archive. Retrieved 21 October 2023.
  4. ^ "Kepler-277". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 October 2023.