Arcturus
IsArcturus(α Boo, α Boötis, Alpha Boötis) sa réaltbhuíonBoötesan réalta is gile sa leathsféar thuaidh spéartha. Le mhéid radharcach de −0.05, s’é an ceathrú réalta is gile i spéir na hoíche ag leanúintSiriusde mhéid -1.46,Canopusde mhéid -0.86 agusAlpha Centauride mhéid -0.27. Tá sé ina réalta i ngar go maith mar níl sé ach ar chianfhad de 36.7 solasbhliain ón Dhomhain agus mar aon leVegaagusSiriusis cheann de na réaltaí is lonraí i gcomharsanacht naGréineé.
Cineál
[cuir in eagar|athraigh foinse]Tá Arcturus ina réalta oráisteach de chineál K0 III le dearbhmhéid de -0.30. Is dócha go bhfuil a hidrigin cáite óna chorplár agus go bhfuil sé anois ina réimloscaidh slige hidrigine.Leanfaidh sé ag méadú roimh dul isteach sa réimcraobh cothrománachdá thimthriall beatha.
Tá Arcturus i réaltbhuíon Boötes.
Sonra Breathnaithe
[cuir in eagar|athraigh foinse]RéaltbhuíonBoötes
Fuaimneadh/ɑːrkˈtjʊərəs/
Ceartéirí14u 15n 39.7s
Díochlaonadh+19° 10′ 56″
Méid fhollasach (breathnaithe)−0.05
Tréithe
[cuir in eagar|athraigh foinse]Cineál speictreachK0 III
Méid fhollasach (radharcach)−2.25
U−B innéacs dathach+1.28
B−V innéacs dathach+1.23
R−I innéacs dathach+0.65
Nóta (catagóir: athrógach): H and K astaíocht
Réaltmhéadracht
[cuir in eagar|athraigh foinse]Luas gathach (Rv)−5.19 km/s
Gluaiseacht ceart (μ) RA:−1093.45 mais/yr
Dec.:−1999.40[5] mais/bhl
Saobhdhiallas (π)88.83 ± 0.54[1] mais
Cianfhad36.7 ± 0.2 sbh,, (11.26 ± 0.07 pc)
Dearbhmhéid (MV)−0.30±0.02
Mionphointí
[cuir in eagar|athraigh foinse]Mais1.08±0.06M☉
Ga25.4±0.2R☉
Lonrachas170L☉
Imtharraingt dromchlach (log g)1.66±0.05 cgs
Teocht4286±30 K
Cóimheas miotalach [Fe/H]−0.52±0.04 dex
Luas rothlaithe (v sin i)2.4±1.0 km/s
Aois7.1+1.5 | −1.2 Gbhl
Ainmchomharthaí eile
[cuir in eagar|athraigh foinse]Alramech,Abramech,α Boötis,16 Boötes,BD+19°2777, GCTP 3242.00, GJ 541, HD 124897, HIP 69673, HR 5340, LHS 48, SAO 100944.
Tagairtí storshonracha SIMBAD sonra
- ↑Olin J. Eggen (1962). "Space-velocity vectors for 3483 stars with proper motion and radial velocity":79.
- ↑Caroline Soubiran (Márta 2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants"(as Béarla) (1): 91–101. doi: .
- ↑Ráite i:Catalogue of Stellar Photometry in Johnson's 11-color system.Stated in source according to:SIMBAD.Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: 2002.
- ↑4.04.1Henrik Jönsson (8 Feabhra 2017). "Abundances of disk and bulge giants from high-resolution optical spectra. I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples"(as Béarla). doi: .
- ↑5.05.15.2George David Gatewood (13 Meitheamh 2008). "Astrometric Studies of Aldebaran, Arcturus, Vega, the Hyades, and Other Regions"(as Béarla) (1): 452–460. doi: .
- ↑David Latham (7 Nollaig 2007). "Rotational and radial velocities for a sample of 761 Hipparcos giants and the role of binarity"(as Béarla) (1): 209–231. doi: .
- ↑Henrik Jönsson (8 Feabhra 2017). "Abundances of disk and bulge giants from high-resolution optical spectra. I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples"(as Béarla). doi: .
- ↑8.08.1Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction"(as Béarla) (2): 653–664. doi: .
- ↑Richard J. Patterson (5 Nollaig 2012). "Identifying contributions to the stellar halo from accreted, kicked-out, and in situ populations"(as Béarla) (2): 161. doi: .