Gamma Ceti
Ang Gamma Ceti (γ Cet, γ Ceti) ay isang sistemang pambituin sa ekwador ng konstelasyong Cetus. Mayroon itong tradisyonal na pangalan na Kaffaljidhma at mayroong maliwanag na kalakhan ng 3.47.[2] Base sa sukatang paralaks, makikita ang lokasyon ng bituin sa layong 80 sinag-taon (24.4 parsec) from Earth.[1]
 Lokasyon ng γ Ceti (nakabilog) malapit sa gitna | |
| Impormasyon sa pagtingin Epoka J2000.0 Equinox J2000.0 | |
|---|---|
| Konstelasyon | Cetus |
| Kanang asensiyon | 02h 43m 18.03910s[1] |
| Deklinasyon | +03° 14′ 08.9390″[1] |
| Maliwanag na kalakhan (V) | 3.47[2] (3.56/6.63/10.16)[3] |
| Katangian | |
| Pag-uuring pambituin | A3 V + F3 V + K5[3] |
| U−B sa talatuntunan ng kulay | +0.07[2] |
| B−V sa talatuntunan ng kulay | +0.09[2] |
| Astrometriya | |
| Radyal na hagibis (Rv) | –5.1[4] km/s |
| Tamang mosyon (μ) | KA: –146.10[1] mas/yr Dek.: –146.12[1] mas/yr |
| Paralaks (π) | 40.97 ± 0.63[1] mas |
| Layo | 80 ± 1 st (24.4 ± 0.4 pc) |
| Detalye | |
| γ Cet A | |
| Radyos | 1.9[5] R☉ |
| Rotasyonal na hagibis (v sin i) | 186[6] km/s |
| Edad | 300[7] Myr |
| Iba pang pagtatanda | |
Etymology
baguhinNagmula ang pamagat na Kaffaljidhma mula sa salitang Arabiko na الكف الجذماء Al Kaff al Jidhmah, na may kahulugang "Ang putol na maikling kamay".[9] Ayon sa katalogo ng mga bituin sa Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, orihinal na pamagat ang Al Kaff al Jidhmah sa limang bituin: γ Cet bilang Kaffaljidhma, ξ1 Cet bilang Al Kaff al Jidhmah I, ξ2 Cet bilang Al Kaff al Jidhmah II, δ Cet bilang Al Kaff al Jidhmah III at μ Cet bilang Al Kaff al Jidhmah IV (hindi kasama ang α Cet at λ Cet).[10]
Sa Wikang Tsino, tumutukoy ang 天囷 (Tiān Qūn), na may kahulugang Circular Celestial Granary, sa asterismong naglalaman ng γ Ceti, α Ceti, κ1 Ceti, λ Ceti, μ Ceti, ξ1 Ceti, ξ2 Ceti, ν Ceti, δ Ceti, 75 Ceti, 70 Ceti, 63 Ceti at 66 Ceti. Dahil dito, nakilala ang γ Ceti bilang 天囷八 (Tiān Qūn bā, Ingles: the Eighth Star of Circular Celestial Granary.)[11]
Talababa
baguhin- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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
{{citation}}: Unknown parameter|month=ignored (tulong)CS1 maint: date auto-translated (link) - ↑ 2.0 2.1 2.2 2.3 Johnson, H. L.; atbp. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J
{{citation}}: CS1 maint: date auto-translated (link) - ↑ 3.0 3.1 Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x
{{citation}}: Unknown parameter|month=ignored (tulong)CS1 maint: date auto-translated (link) - ↑ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495.....
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, bol. 1 (ika-3 (na) edisyon), Birkhäuser, ISBN 3-540-29692-1
{{citation}}: CS1 maint: date auto-translated (link). The radius (R*) is given by: - ↑ Royer, F.; Zorec, J.; Gómez, A. E. (2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224
{{citation}}: Unknown parameter|month=ignored (tulong)CS1 maint: date auto-translated (link) - ↑ Su, K. Y. L.; atbp. (2006), "Debris Disk Evolution around A Stars", The Astrophysical Journal, 653 (1): 675–689, arXiv:astro-ph/0608563, Bibcode:2006ApJ...653..675S, doi:10.1086/508649
{{citation}}: Unknown parameter|month=ignored (tulong)CS1 maint: date auto-translated (link) - ↑ "LTT 10892 -- High proper-motion Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, nakuha noong 2012-03-04
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Allen, Richard Hinckley (1963), Star Names: Their Lore and Meaning (ika-Dover (na) edisyon), University of Chicago, p. 160
{{citation}}: CS1 maint: date auto-translated (link) - ↑ Rhoads, Jack W. (Nobyembre 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars (PDF), Jet Propulsion Laboratory, California Institute of Technology
{{citation}}: CS1 maint: date auto-translated (link) - ↑ (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.
Mga kawing panlabas
baguhin- Kaler, James B., "KAFFALJIDHMA (Gamma Ceti)", Stars, University of Illinois, nakuha noong 2012-03-04
{{citation}}: CS1 maint: date auto-translated (link)