Kepler-421 (KOI-1274 A) is a yellow main sequence star, being of spectral class G7V. Orange star of spectral class K9V (KOI-1274 B), projected on sky plane just 1.085″ away, is not physically associated to it.[3] The distance to star KOI-1274 A is approximately 1150 light-years, and to KOI-1274 B is about 1900 light-years.
Planetary system
Kepler-421 has an exoplanet (Kepler-421b), which is notable for its position near the snow line.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 1.219+0.089 −0.106 |
704.20±0.01 | 0.041+0.095 −0.034 |
89.965+0.024 −0.031° |
0.411+0.021 −0.016 RJ |
References
- ^ a b c d 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.
- ^ a b c d Kipping, D. M.; Torres, G.; Buchhave, L. A.; Kenyon, S. J.; Henze, C.; Isaacson, H.; Kolbl, R.; Marcy, G. W.; Bryson, S. T.; Stassun, K.; Bastien, F. (9 October 2014). "Discovery of a Transiting Planet Near the Snow-Line". The Astrophysical Journal. 795 (1): 25. arXiv:1407.4807. Bibcode:2014ApJ...795...25K. doi:10.1088/0004-637X/795/1/25. S2CID 119240746.
- ^ a b Atkinson, Dani; Baranec, Christoph; Ziegler, Carl; Law, Nicholas; Riddle, Reed; Morton, Tim (2016), "Probability of the Physical Association of 104 Blended Companions To Kepler Objects of Interest Using Visible and Near-Infrared Adaptive Optics Photometry", The Astronomical Journal, 153: 25, arXiv:1609.09512, doi:10.3847/1538-3881/153/1/25, S2CID 119307017
- ^ a b c d Brewer, John M.; Fischer, Debra A. (2018). "Spectral Properties of Cool Stars: Extended Abundance Analysis of Kepler Objects of Interest". The Astrophysical Journal Supplement Series. 237 (2): 38. arXiv:1804.00673. Bibcode:2018ApJS..237...38B. doi:10.3847/1538-4365/aad501. S2CID 119431797.
- ^ a b Herman, Miranda K.; Zhu, Wei; Wu, Yanqin (2019), "Revisiting the Long-period Transiting Planets from Kepler", The Astronomical Journal, 157 (6): 248, arXiv:1901.01974, Bibcode:2019AJ....157..248H, doi:10.3847/1538-3881/ab1f70, S2CID 119550672
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ "Kepler-421". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ Kawahara, Hajime; Masuda, Kento (2019), "Transiting Planets near the Snow Line from Kepler. I. Catalog", The Astronomical Journal, 157 (6): 218, arXiv:1904.04980, Bibcode:2019AJ....157..218K, doi:10.3847/1538-3881/ab18ab, S2CID 119099510
- ^ Planet Kepler-421 b at exoplanets.eu