Alpha Ceti
Ang Alpha Ceti (α Cet, α Ceti) ay isang bituin sa konstelasyon ng Cetus. May tradisyunal na pangalan itong Menkar o Menkab. Nanggaling ang salitang Menkar mula sa salitang Arabe na منخر manħar "butas ng ilong" (ng Cetus).
 Lokasyon ng α Ceti(nakabilog) | |
| Impormasyon sa pagtingin Epoka J2000 Equinox J2000 | |
|---|---|
| Konstelasyon | Cetus |
| Kanang asensiyon | 03h 02m 16.77307s[1] |
| Deklinasyon | +04° 05′ 23.0596″[1] |
| Maliwanag na kalakhan (V) | 2.53[2] |
| Katangian | |
| Pag-uuring pambituin | M1.5 IIIa[3] |
| U−B sa talatuntunan ng kulay | +1.93[2] |
| B−V sa talatuntunan ng kulay | +1.64[2] |
| Uri ng baryabulo | Wala[4] |
| Astrometriya | |
| Radyal na hagibis (Rv) | –26.08 ± 0.02[5] km/s |
| Tamang mosyon (μ) | KA: -10.41 ± 0.51[1] mas/yr Dek.: -76.85 ± 0.36[1] mas/yr |
| Paralaks (π) | 13.09 ± 0.44[1] mas |
| Layo | 249 ± 8 st (76 ± 3 pc) |
| Lubusang kalakhan (MV) | –3.2 ± 0.3[3] |
| Detalye | |
| Bigat | 2.3 ± 0.2[6] M☉ |
| Radyos | 89 ± 5[6] R☉ |
| Luminosidad | 1455 ± 328[6] L☉ |
| Pang-ibabaw na grabidad (log g) | 0.9 ± 0.1[6] |
| Temperatura | 3,795 ± 70[6] K |
| Metalisidad [Fe/H] | 0.00 ± 0.30[6] dex |
| Rotasyonal na hagibis (v sin i) | 6.9[7] km/s |
| Iba pang pagtatanda | |
| Sangguniang pangimpormasyon | |
| SIMBAD | data |
Ang bituing ito, kasama ang γ Cet (Kaffaljidhma), δ Cet, λ Cet (Menkar), μ Cet, ξ1 Cet at ξ2 Cet ay mga Al Kaff al Jidhmah, "bahagi ng isang kamay".[8]
Sa Wikang Tsino, tumutukoy ang 天囷 (Tiān Qūn), na may kahulugang Circular Celestial Granary, sa isang asterismo na naglalaman ng α Ceti, κ1 Ceti, λ Ceti, μ Ceti, ξ1 Ceti, ξ2 Ceti, ν Ceti, γ Ceti, δ Ceti, 75 Ceti, 70 Ceti, 63 Ceti at 66 Ceti. Dahil dito, nakilala ang α Ceti bilang 天囷一 (Tiān Qūn yī, Ingles: the First Star of Circular Celestial Granary.)[9]
Talababa
baguhin- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (Nobyembre 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.
{{cite journal}}: CS1 maint: date auto-translated (link) - ↑ 2.0 2.1 2.2 Johnson, H. L.; atbp. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99). Bibcode:1966CoLPL...4...99J.
{{cite journal}}: CS1 maint: date auto-translated (link) - ↑ 3.0 3.1 Tsuji, T. (Oktubre 2008), "Cool luminous stars: the hybrid nature of their infrared spectra", Astronomy and Astrophysics, 489 (3): 1271–1289, arXiv:0807.4387, Bibcode:2008A&A...489.1271T, doi:10.1051/0004-6361:200809869
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Wittkowski, M.; atbp. (Nobyembre 2007), "Polychromatic Interferometry of Mira Variables", sa Kerschbaum, F.; Charbonnel, C.; Wing, R. F. (mga pat.), Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes, proceedings of the conference held 7-11 August 2006 at University Campus, Vienna, Austria, ASP Conference Series, bol. 378, San Francisco: Astronomical Society of the Pacific, p. 262, Bibcode:2007ASPC..378..262W
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Famaey, B.; atbp. (Enero 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430 (1): 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
{{cite journal}}: CS1 maint: date auto-translated (link) - ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Wittkowski, M.; atbp. (Disyembre 2006), "Tests of stellar model atmospheres by optical interferometry. IV. VINCI interferometry and UVES spectroscopy of Menkar", Astronomy and Astrophysics, 460 (3): 855–864, arXiv:astro-ph/0610150, Bibcode:2006A&A...460..855W, doi:10.1051/0004-6361:20066032
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Massarotti, Alessandro; atbp. (Enero 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
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Star Name - R.H. Allen p.160
- ↑ (sa Tsino) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日 Naka-arkibo 2012-02-04 sa Wayback Machine.