Zeta Ceti
| Data pengamatan Epos J2000.0 Ekuinoks J2000.0 (ICRS) | |
|---|---|
| Rasi bintang | Cetus |
| Asensio rekta | 01j 51m 27.63482d[1] |
| Deklinasi | −10° 20′ 06.1289″[1] |
| Magnitudo tampak (V) | 3,742[2] |
| Ciri-ciri | |
| Kelas spektrum | K0 III Ba0.1[3] |
| Indeks warna U−B | +1,076[2] |
| Indeks warna B−V | +1,131[2] |
| Jenis variabel | Suspected[4] |
| Astrometri | |
| Kecepatan radial (Rv) | +10,86±0,64[5] km/s |
| Gerak diri (μ) | RA: +40,80[1] mdb/thn Dek.: −37,25[1] mdb/thn |
| Paralaks (π) | 13,88±0,57[1] mdb |
| Jarak | 235 ± 10 tc (72 ± 3 pc) |
| Magnitudo mutlak (MV) | −0,54[6] |
| Orbit[7] | |
| Periode (P) | 1.652 hari |
| Eksentrisitas (e) | 0,59 |
| Bujur node menaik (Ω) | 85° |
| Epos apsis (T) | 2414377 JD |
| Semiamplitudo (K1) (primer) | 3,3 km/s |
| Detail[5] | |
| ζ Cet A | |
| Massa | 2,34[8] M☉ |
| Radius | 25 R☉ |
| Luminositas | 240 L☉ |
| Gravitasi permukaan (log g) | 2,4 |
| Suhu | 4,581±14 K |
| Metalisitas [Fe/H] | −0,13 |
| Kecepatan rotasi (v sin i) | 3,2 km/s |
| Usia | 1,24[8] gigatahun |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
Zeta Ceti (ζ Cet / ζ Ceti) merupakan salah satu bintang pada rasi bintang Cetus. Zeta Ceti merupakan bintang kuning dengan kelas K0 III Ba0.1[3] dan berada pada jarak 235 tahun cahaya (72 parsec) dari Matahari.[1] Bintang ini memiliki magnitudo tampak 3,742.[2]
Etimologi
Baten Kaitos adalah nama tradisional dari bintang ini, berasal dari bahasa Arab batn qaytus yang berarti "perut ikan paus". Nama lain yang diberikan oleh para astronom adalah:
| nama lain | asal bahasa | arti |
|---|---|---|
| Rabah al Naamat / Quarta Sthrutionum | Arab / Latin | burung unta keempat[10] |
| 天倉四 / Tiāncāngsì | China | bintang keempat pada rasi Lumbung Persegi Empat di Langit[11] |
Selain rasi Cetus, bintang ini juga merupakan anggota dari berbagai rasi atau asterisma berikut:
| nama rasi / asterisma | asal | arti | anggota lainnya |
|---|---|---|---|
| 天倉 / Tiāncāng | China | Lumbung Persegi Empat di Langit | ι Cet, η Cet, θ Cet, τ Cet, 57 Cet |
| Al Naʽāmāt[12] | Arab | burung unta betina | η Cet, θ Cet, τ Cet, υ Cet |
Referensi
- ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- ^ a b c d Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society, 172: 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667. Pemeliharaan CS1: DOI bebas tanpa ditandai (link)
- ^ a b Lu, Phillip K. (1991), "Taxonomy of barium stars", Astronomical Journal (ISSN 0004-6256), 101: 2229, Bibcode:1991AJ....101.2229L, doi:10.1086/115845.
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2007), Combined General Catalogue of Variable Stars (GCVS4.2), diakses tanggal 2016-09-30.
- ^ a b Massarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- ^ Pourbaix, D.; et al. (2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy & Astrophysics, 424 (2): 727, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213.
- ^ a b Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 23, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, 88.
- ^ "zet Cet -- Spectroscopic binary", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, diakses tanggal 2017-02-04.
- ^ http://articles.adsabs.harvard.edu//full/1895MNRAS..55..429K/0000432.000.html
- ^ salah satu rasi bintang menurut bangsa Cina
- ^ http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Cetus*.html
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