Arcturus

Is Arcturus (α Boo, α Boötis, Alpha Boötis) sa réaltbhuíon Boötes an 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 leanúint Sirius de mhéid -1.46, Canopus de mhéid -0.86 agus Alpha Centauri de 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 le Vega agus Sirius is cheann de na réaltaí is lonraí i gcomharsanacht na Gréine é.

Arcturus
Cineál	réalta threorach, foinse neas-infridhearg agus foinse UV
Cineál speictreach (réalta)	K2IIIp[1]
Réaltbhuíon	an tAoire
Aois	J2000.0
Saintréithe fisiceacha agus réaltmhéadracha
Fad ón Domhan	36.7 ly
Ga	25.4 R☉
Dearbhmhéid	−0.38 −0.304[2]
Méid dhealraitheach (V)	−0.05 (banda V)[3]
Mais	1.3 M☉
Teocht éifeachtach	4,251 K[4]
Saobhdhiallas	87.5 mas[5]
Dualghluaisne (diallas)	−1,999.96 mas/y [5]
Dualghluaisne (dronairde)	−1,092.66 mas/y [5]
Luas rothlaithe réaltach	4.2 km/s[6]
Luas gathach	−5.16 km/s[7]
Imtharraingt dromchla	52 cm/s²[4]
Dronairde (α)	14h 15m 39.6721s[8]
Diallas (δ)	19° 10′ 56.673″[8]
Miotalacht	−0.57[9]
Dath	dath U-B= 1.27
Lonrachas	215 lonrachas na gréine
Compánaigh	alf Boo B
Cuid de	Arcturus stream (en) , Spring Triangle (en) agus an tAoire
Catalóga réalteolaíochta
HD 124897 (catalóg Henry Draper) HIP 69673 (Hipparcos Catalogue (en) ) HR 5340 (Bright Star Catalogue (en) ) IRAS 14133+1925 (IRAS) SAO 100944 (Smithsonian Astrophysical Observatory Star Catalog (en) ) 2MASS J14153968+1910558 (2MASS) GJ 541 (Gliese Catalogue of Nearby Stars (en) ) α Boo (Bayer designation (en) ) ASCC 870215 (All-sky Compiled Catalogue (en) ) BD+19 2777 (Durchmusterung (en) ) CSV 101433 (Catalogue of suspected variable stars (en) ) FK5 526 (FK5 (en) ) GC 19242 (Boss General Catalogue (en) ) GCRV 8341 (General Catalogue of Stellar Radial Velocities (en) ) HIC 69673 (Hipparcos Input Catalogue (en) ) IRC +20270 (Two-Micron Sky Survey (en) ) JP11 2486 (JP11 (en) ) LFT 1084 (Luyten Five-Tenths catalogue (en) ) LHS 48 (Luyten Half-Second catalogue (en) ) LSPM J1415+1910 (LSPM-NORTH catalog (en) ) LTT 14184 (Luyten Two-Tenths catalogue (en) ) N30 3229 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ) NLTT 36756 (New Luyten Two-Tenths catalogue (en) ) NSV 6603 (New Catalogue of Suspected Variable Stars (en) ) PLX 3242 (General Catalogue of Trigonometric Stellar Parallaxes (en) ) PLX 3242.00 (General Catalogue of Trigonometric Stellar Parallaxes (en) ) PMC 90-93 376 (Tokyo Photoelectric Meridian Circle Catalog (en) ) PPM 130442 (PPM Star Catalogue (en) ) RAFGL 1693 (The Revised AFGL (RAFGL) catalogue (en) ) ROT 2044 (Catalogue of rotational velocities of the stars (en) ) SRS 30526 (Southern Reference Star Catalog (en) ) TD1 17351 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ) TYC 1472-1436-1 (Tycho Catalogue (en) ) UBV 12551 (UBV Photoelectric Photometry Catalogue (en) ) uvby98 100124897 (uvbyβ Photoelectric Photometric Catalogue (en) ) YPAC 52 (Yunnan Photoelectric Astrolabe Catalogue (en) ) CCDM J14157+1911A (Catalog of Components of Double and Multiple Stars (en) ) WDS J14157+1911A (Washington Double Star Catalog (en) ) Ci 20 843 (Catalogue of proper motion stars (en) ) PM 14134+1927 (Catalogs of proper-motion stars. I. Stars brighter than visual magnitude 15 and with annual proper motion of 1" or more (en) ) PM 14134-1927 (Catalogs of proper-motion stars. I. Stars brighter than visual magnitude 15 and with annual proper motion of 1" or more (en) ) WEB 12132 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ) 16 Boo (Flamsteed designation (en) ) TIC 459832522 (TESS Input Catalog (en) ) AAVSO 1411+19 (AAVSO (en) ) AG+19 1335 (AGK3U (en) ) UBV M 20076 (UBV Photoelectric Photometry Catalogue (en) )

Cineál

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 réim loscaidh slige hidrigine. Leanfaidh sé ag méadú roimh dul isteach sa réim craobh cothrománach dá thimthriall beatha.

Tá Arcturus i réaltbhuíon Boötes.

Sonra Breathnaithe

Réaltbhuíon Boötes

Fuaimneadh /ɑːrkˈtjʊərəs/

Ceartéirí 14u 15n 39.7s

Díochlaonadh +19° 10′ 56″

Méid fhollasach (breathnaithe) −0.05

Tréithe

Cineál speictreach K0 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

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

Cianfhad 36.7 ± 0.2 sbh ,, (11.26 ± 0.07 pc)

Dearbhmhéid (MV) −0.30±0.02

Mionphointí

Mais 1.08±0.06 M☉

Ga 25.4±0.2 R☉

Lonrachas 170 L☉

Imtharraingt dromchlach (log g) 1.66±0.05 cgs

Teocht 4286±30 K

Cóimheas miotalach [Fe/H] −0.52±0.04 dex

Luas rothlaithe (v sin i) 2.4±1.0 km/s

Aois 7.1+1.5 | −1.2 Gbhl

Ainmchomharthaí eile

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

1. Olin J. Eggen (1962). "Space-velocity vectors for 3483 stars with proper motion and radial velocity": 79.
2. Caroline Soubiran (Márta 2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants" (as Béarla) (1): 91–101. doi:10.1051/0004-6361:20078788.
3. 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. 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:10.1051/0004-6361/201629128.
5. George David Gatewood (13 Meitheamh 2008). "Astrometric Studies of Aldebaran, Arcturus, Vega, the Hyades, and Other Regions" (as Béarla) (1): 452–460. doi:10.1088/0004-6256/136/1/452.
6. 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:10.1088/0004-6256/135/1/209.
7. 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:10.1051/0004-6361/201629128.
8. Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction" (as Béarla) (2): 653–664. doi:10.1051/0004-6361:20078357.
9. 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:10.1088/0004-637X/761/2/161.