RW Cephei
  Lokasi RW Cephei. | |
| Data pengamatan Epos J2000.0 Ekuinoks J2000.0 | |
|---|---|
| Rasi bintang | Cepheus |
| Asensio rekta | 22j 23m 07.01657d[1] |
| Deklinasi | +55° 57′ 47.6262″[1] |
| Magnitudo tampak (V) | +6.65[2] (6.0 - 7.3[3]) |
| Ciri-ciri | |
| Kelas spektrum | K2 0-Ia[4] (G8 - M2Ia-0[3]) |
| Magnitudo semu (K) | 1.88[2] |
| Indeks warna U−B | 2.38[2] |
| Indeks warna B−V | 2.22[2] |
| Jenis variabel | SRd[5] |
| Astrometri | |
| Kecepatan radial (Rv) | -56.00[6] km/s |
| Gerak diri (μ) | RA: -2.74[1] mdb/thn Dek.: -2.66[1] mdb/thn |
| Paralaks (π) | 0,2357±0,0944[7] mdb |
| Jarak | sekitar 14.000 tc (sekitar 4.000 pc) |
| Magnitudo mutlak (MV) | −8.0[8] - −9.4[9] |
| Detail | |
| Massa | 13.9[10] M☉ |
| Radius | 1,158[11] R☉ |
| Luminositas | 417,000[12] L☉ |
| Gravitasi permukaan (log g) | 0.2[13] |
| Suhu | 3,956 ± 129[11] (3,749 - 5,018)[13] K |
| Usia | 18.7[10] megatahun |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
RW Cephei adalah bintang superraksasa g8 yang dapat ditemukan di rasi bintang Cepheus dan juga bintang variabel, yang terletak sekitar 3.500 tahun cahaya dari Bumi dan berdiameter 1.535 jari-jari matahari. RW Cephei adalah salah satu bintang yang paling istimewa karena merupakan satu-satunya superraksasa oranye yang dikenal.[14][15][16][17]
Referensi
[sunting | sunting sumber]- ^ a b c d Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
- ^ a b Watson, C. L. (2006). "The International Variable Star Index (VSX)". The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23–25. 25: 47. Bibcode:2006SASS...25...47W.
- ^ Keenan, P. C.; Yorka, S. B. (1988). "1988 Revised MK Spectral Standards for Stars GO and Later". Bulletin d'Information du Centre de Données Stellaires. 35: 37. Bibcode:1988BICDS..35...37K.
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878 . Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.
- ^ Brown, A. G. A.; et al. (kolaborasi Gaia) (Agustus 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 . Catatan Gaia DR2 untuk sumber tersebut di VizieR.
- ^ Stencel, Robert E.; Pesce, Joseph E.; Hagen Bauer, Wendy (1988). "Far-infrared circumstellar 'debris' shell of red supergiant stars". Astronomical Journal. 95: 141. Bibcode:1988AJ.....95..141S. doi:10.1086/114622.
- ^ Humphreys, R. M. (1978). "Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way". The Astrophysical Journal Supplement Series. 38: 309. Bibcode:1978ApJS...38..309H. doi:10.1086/190559.
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883 . Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.
- ^ a b Stassun K.G.; et al. (October 2019). "The revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4). arXiv:1905.10694 . Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ^ Humphreys, R. M. (1984). "The brightest stars in the Magellanic Clouds and other late-type galaxies". IAU Symposium. 108: 145–156. Bibcode:1984IAUS..108..145H. doi:10.1017/S0074180900040134.
- ^ a b Kesalahan pengutipan: Tag
<ref>tidak sah; tidak ditemukan teks untuk ref bernamairtf - ^ "RW Cephei (Supergiant Star) Star Facts". Universe Guide (dalam bahasa Inggris). Diakses tanggal 2020-07-19.
- ^ "RW Cephei". Beyond Universe Wiki (dalam bahasa Inggris). Diarsipkan dari versi asli tanggal 2020-07-19. Diakses tanggal 2020-07-19.
- ^ July 2018, Nola Taylor Redd 26. "What Is the Biggest Star?". Space.com (dalam bahasa Inggris). Diakses tanggal 2020-07-19.
- ^ Cain, Fraser (2016-05-12). "What is the Biggest Star in the Universe?". Universe Today (dalam bahasa Inggris). Diakses tanggal 2020-07-19.
