astro.wikisort.org - Star
Kepler-33 is a star in the constellation of Cygnus with a system of five known planets. Having just begun to evolve off from the main sequence,[6] its radius and mass are difficult to ascertain, although data available in 2020 shows its best-fit mass of 1.3M☉ and diameter of 1.6R☉ are compatible with a model of a subgiant star.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 16m 18.6100s[1] |
| Declination | +46° 00′ 18.813″[1] |
| Apparent magnitude (V) | 13.988 |
| Characteristics | |
| Spectral type | G1IV |
| Astrometry | |
| Proper motion (μ) | RA: −1.107±0.031[1] mas/yr Dec.: −13.083±0.029[1] mas/yr |
| Parallax (π) | 0.7982 ± 0.0151 mas[1] |
| Distance | 4,090 ± 80 ly (1,250 ± 20 pc) |
| Details | |
| Mass | 1.3 [2] M☉ |
| Radius | 1.6 [2] R☉ |
| Temperature | 5849 [3] K |
| Metallicity [Fe/H] | 0.12 [3] dex |
| Age | 4.8+1.4 −0.6 [4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
First detections of the four-body planetary system were reported in February 2011.[7] On January 26, 2012, a 5th planet around the star was confirmed.[6] However, unlike other planets confirmed via Kepler, their masses were initially not known, as Doppler Spectroscopy measurements were not done before the announcement. Judging by their radii, b may be a large Super-Earth or small Hot Neptune while the other four are all likely to be the latter.
Planets b and c may actually be in a 7:3 resonance, as there is a 0.05 day discrepancy; there is also a small 0.18 day discrepancy between a 5:3 resonance between planets c and d. The other planets do not seem to be in any resonances, though near resonances are 3d:2e and 4e:3f.
The planetary system in current configuration is highly susceptible to perturbations, therefore assuming stability, no additional giant planets can be located within 30 AU from the parent star.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.0677 ± 0.0014 | 5.66793 ± 0.00012 | — | — | 0.16 ± 0.02 RJ |
| c | — | 0.1189 ± 0.0025 | 13.1756 ± 0.00014 | — | — | 0.29 ± 0.027 RJ |
| d | 4.3+2.0 −2.0 M🜨 |
0.1626±0.0022 | 21.776 ± 0.00011 | — | — | 0.48 ± 0.04 RJ |
| e | 6.1+1.1 −1.0 M🜨 |
0.2092±0.0028 | 31.7844 ± 0.00039 | — | — | 0.36 ± 0.034 RJ |
| f | 10.6+1.6 −1.5 M🜨 |
0.2535 ± 0.0054 | 41.029 ± 0.00042 | — | — | 0.4 ± 0.037 RJ |
See also
References
- 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.
- Berger, Travis A.; Huber, Daniel; van Saders, Jennifer L.; Gaidos, Eric; Tayar, Jamie; Kraus, Adam L. (2020), "The Gaia-Kepler Stellar Properties Catalog. I. Homogeneous Fundamental Properties for 186,301 Kepler Stars", The Astronomical Journal, 159 (6): 280, arXiv:2001.07737, Bibcode:2020AJ....159..280B, doi:10.3847/1538-3881/159/6/280, S2CID 210859307
- Johnson, Michele (9 April 2015). "How many exoplanets has Kepler discovered?". nasa.gov. Archived from the original on 27 May 2010.
- Chachan, Yayaati; Jontof-Hutter, Daniel; Knutson, Heather A.; Adams, Danica; Gao, Peter; Benneke, Björn; Berta-Thompson, Zachory; Dai, Fei; Deming, Drake; Ford, Eric; Lee, Eve J.; Libby-Roberts, Jessica E.; Madhusudhan, Nikku; Wakeford, Hannah R.; Wong, Ian (2020), "A Featureless Infrared Transmission Spectrum for the Super-Puff Planet Kepler-79d", The Astronomical Journal, 160 (5): 201, arXiv:2008.05480, Bibcode:2020AJ....160..201C, doi:10.3847/1538-3881/abb23a, S2CID 221112629
- "Notes for star Kepler-33". Archived from the original on 2012-04-26. Retrieved 2012-02-01.
- Lissauer, Jack J.; Marcy, Geoffrey W.; Rowe, Jason F.; Bryson, Stephen T.; Adams, Elisabeth; Buchhave, Lars A.; Ciardi, David R.; Cochran, William D.; Fabrycky, Daniel C.; Ford, Eric B.; Fressin, Francois; Geary, John; Gilliland, Ronald L.; Holman, Matthew J.; Howell, Steve B.; Jenkins, Jon M.; Kinemuchi, Karen; Koch, David G.; Morehead, Robert C.; Ragozzine, Darin; Seader, Shawn E.; Tanenbaum, Peter G.; Torres, Guillermo; Twicken, Joseph D. (10 May 2012). "Almost All of Kepler's Multiple Planet Candidates are Planets". The Astrophysical Journal. 750 (2): 112. arXiv:1201.5424. Bibcode:2012ApJ...750..112L. doi:10.1088/0004-637X/750/2/112. S2CID 30549908.
- Ford, Eric B.; Rowe, Jason F.; Fabrycky, Daniel C.; Carter, Joshua A.; Holman, Matthew J.; Lissauer, Jack J.; Ragozzine, Darin; Steffen, Jason H.; Batalha, Natalie M.; Borucki, William J.; Bryson, Steve; Caldwell, Douglas A.; Dunham, Edward W.; Gautier, Thomas N.; Jenkins, Jon M.; Koch, David G.; Li, Jie; Lucas, Philip; Marcy, Geoffrey W.; McCauliff, Sean; Mullally, Fergal R.; Quintana, Elisa; Still, Martin; Tenenbaum, Peter; Thompson, Susan E.; Twicken, Joseph D. (2011), "Transit Timing Observations from Kepler : I. Statistical Analysis of the First Four Months", The Astrophysical Journal Supplement Series, 197 (1): 2, arXiv:1102.0544, Bibcode:2011ApJS..197....2F, doi:10.1088/0067-0049/197/1/2, S2CID 118472942
- Becker, Juliette C.; Adams, Fred C. (2017), "Effects of Unseen Additional Planetary Perturbers on Compact Extrasolar Planetary Systems", Monthly Notices of the Royal Astronomical Society, 468: 549–563, arXiv:1702.07714, doi:10.1093/mnras/stx461, S2CID 119325005
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На других языках
[de] Kepler-33
Kepler-33 ist ein Unterriese im Sternbild Schwan, der ein Planetensystem mit fünf bekannten Exoplaneten besitzt. Die Entfernung des Sterns zum Sonnensystem ist unbekannt.- [en] Kepler-33
[ru] Kepler-33
Kepler-33 — звезда, которая находится в созвездии Лебедя на расстоянии около 4279 световых лет от нас. Вокруг звезды обращаются, как минимум, пять планет.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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