An Réalta Thuaidh

An Réalta Thuaidh
Cineál	F-chineál, triple star system (en) , classical Cepheid variable (en) , réalta eolais, réalta threorach, foinse infridhearg, foinse neas-infridhearg agus foinse UV
Cineál speictreach (réalta)	F7 :IB-II SB,V
Réaltbhuíon	an Béar Beag
Aois	J2000.0
Saintréithe fisiceacha agus réaltmhéadracha
Fad ón Domhan	432 ly
Ga	30 R☉
Dearbhmhéid	−3.64
Méid dhealraitheach (V)	2.02 (banda V)
Mais	6 M☉
Teocht éifeachtach	6,206 K
Saobhdhiallas	7.54 mas
Dualghluaisne (diallas)	−11.85 mas/y
Dualghluaisne (dronairde)	44.48 mas/y
Luas rothlaithe réaltach	17 km/s
Luas gathach	−20.81 km/s
Imtharraingt dromchla	44 cm/s²
Dronairde (α)	2h 31m 49.0946s
Diallas (δ)	89° 15′ 50.7923″
Miotalacht	0.19
Lonrachas	2,200 lonrachas na gréine
Aois measta	70 megaannum (en)
Catalóga réalteolaíochta
	α UMi (Bayer designation (en) ); ADS 1477 A (Aitken Double Star Catalogue (en) ); 2MASS J02314822+8915503 (2MASS); ADS 1477 AP (Aitken Double Star Catalogue (en) ); BD+88 8 (Durchmusterung (en) ); CCDM J02319+8915A (Catalog of Components of Double and Multiple Stars (en) ); FK5 907 (FK5 (en) ); GC 2243 (Boss General Catalogue (en) ); GCRV 1037 (General Catalogue of Stellar Radial Velocities (en) ); GSC 04628-00237 (Guide Star Catalog (en) ); HD 8890 (catalóg Henry Draper); HIC 11767 (Hipparcos Input Catalogue (en) ); HIP 11767 (Hipparcos Catalogue (en) ); HR 424 (Bright Star Catalogue (en) ); IDS 01226+8846 A (Index Catalogue of Visual Double Stars (en) ); IRAS 01490+8901 (IRAS); JP11 498 (JP11 (en) ); N30 381 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ); PLX 299 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); PLX 299.00 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); PMC 90-93 640 (Tokyo Photoelectric Meridian Circle Catalog (en) ); PPM 431 (PPM Star Catalogue (en) ); ROT 3491 (Catalogue of rotational velocities of the stars (en) ); SAO 308 (Smithsonian Astrophysical Observatory Star Catalog (en) ); TD1 835 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ); TYC 4628-237-1 (Tycho Catalogue (en) ); UBV 21589 (UBV Photoelectric Photometry Catalogue (en) ); alf UMi (General Catalogue of Variable Stars); WDS J02318+8916A (Washington Double Star Catalog (en) ); WDS J02318+8916Aa,Ab (Washington Double Star Catalog (en) ); SBC9 76 (Eighth catalogue of the orbital elements of spectroscopic binary systems (en) ); SBC7 51 (Seventh catalogue of the orbital elements of spectroscopic binary systems (en) ); WEB 2438 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ); 1 UMi (Flamsteed designation (en) ); TIC 303256075 (TESS Input Catalog (en) ); AAVSO 0122+88 (AAVSO (en) ); AG+89 4 (AGK3U (en) ); UBV M 8201 (UBV Photoelectric Photometry Catalogue (en) )

An réalta is gile i réaltbhuíon an Bhéir Bhig, a luíonn taobh istigh de 1° ón mol neamhaí thuaidh anois. Tugtar Polaris uirthi freisin. Is ionann a airde le domhanleithead an fhéachadóra, a bheag nó a mhór. D'úsáidtí le fada í i gcomhair loingseoireachta simplí.^[7]

Tagairtí

↑ "Color excesses for supergiants and classical Cepheids. I. Calibration of the G-band photometry" (as Béarla) (1960): 330–350. doi:10.1086/146837.
↑ 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.
↑ ^3.0 ^3.1 ^3.2 "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library" (as Béarla) (Feabhra 2012): A143. doi:10.1051/0004-6361/201118065.
↑ ^4.0 ^4.1 ^4.2 ^4.3 ^4.4 Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction" (as Béarla) (2): 653–664. doi:10.1051/0004-6361:20078357.
↑ Ráite i: Catalogue of rotational velocities of the stars. Stated in source according to: SIMBAD. Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: Meitheamh 1970.
↑ Ráite i: Gaia Data Release 2. Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: 25 Aibreán 2018.
↑ Hussey, Matt (2011). "An Réalta Thuaidh". Fréamh an Eolais. Coiscéim. p. 552.

[598be73b83d3e07928e2e2f834a6401cd308affc-1] "Color excesses for supergiants and classical Cepheids. I. Calibration of the G-band photometry" (as Béarla) (1960): 330–350. doi:10.1086/146837.

[a1b1b6b07c06876959d87fc2f8c07203d5b512f3-2] 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.

[ca9a66db4803ddcd6c9fd949a921bc14bbdd1d9e-3] 3.0 ^3.1 ^3.2 "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library" (as Béarla) (Feabhra 2012): A143. doi:10.1051/0004-6361/201118065.

[8edd049ced48440d6882cc10b733308727e81acc-4] 4.0 ^4.1 ^4.2 ^4.3 ^4.4 Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction" (as Béarla) (2): 653–664. doi:10.1051/0004-6361:20078357.

[9236234eae2b798f9e4568c650db8ec35ac4e092-5] Ráite i: Catalogue of rotational velocities of the stars. Stated in source according to: SIMBAD. Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: Meitheamh 1970.

[b64af6c056b6c5f6a7ea17156dcd718d4744bbf8-6] Ráite i: Gaia Data Release 2. Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: 25 Aibreán 2018.

[FreamhanEolais-7] Hussey, Matt (2011). "An Réalta Thuaidh". Fréamh an Eolais. Coiscéim. p. 552.

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