Altair

Coordenaes: 19^h 50^m 46.999^s, 8^° 52^′ 5.956^″

Altair

Altair
estrella[1], estrella doble (es) [1], near-IR source (en) [1] y UV-emission source (en) [1]
Parte de	Nube G (es) y Triángulu de branu
Datos d'observación
Ascensión reuta (α)	297,695827296 °[2]
Declinación (δ)	8,868321196 °[2]
Distancia a la Tierra	17 ly
Magnitú aparente (V)	0,76 (banda V)
Magnitú absoluta	2,22
Constelación	Aquila (es)
Velocidá de rotación	90,8 km/s[3]
Velocidá radial	−26,6 km/s[4]
Parallax	194,95 mas[2]
Carauterístiques físiques
Radiu	1,7 Radius solars
Diámetru	2 530 000 km [5]
Masa	1,7 M☉
Gravedá superficial	9000 cm/s²[3]
Achatamientu	0,2[6]
Tipu espectral	A7Vn[7]
Otros nomes
Ver llista SAO 125122 (Catálogu SAO) 2MASS J19504698+0852060 (2MASS (es) ) GSC 01058-03399 (Guide Star Catalog (es) ) HD 187642 (Catálogu Henry Draper) HIP 97649 (Catálogu Hipparcos) HR 7557 (Bright Star Catalogue) IRAS 19483+0844 (IRAS (es) ) GJ 768 (Catálogu Gliese) α Aql (Denominación de Bayer) ADS 13009 A (Aitken Double Star Catalogue (en) ) 1ES 1948+08.7 (Einstein Slew survey, Version No. 1 (en) ) 1RXS J195047.0+085159 (1RXS (en) ) ASCC 1075038 (All-sky Compiled Catalogue (en) ) BD+08 4236 (Bonner Durchmusterung) CCDM J19508+0852A (Catalog of Components of Double and Multiple Stars (en) ) FK5 745 (FK5 (en) ) GC 27470 (Boss General Catalogue (es) ) GCRV 12193 (General Catalogue of Stellar Radial Velocities (es) ) HIC 97649 (Hipparcos Input Catalogue (en) ) IDS 19459+0836 A (Index Catalogue of Visual Double Stars (en) ) IRC +10441 (Two-Micron Sky Survey (en) ) JP11 3142 (JP11 (en) ) LFT 1499 (Luyten Five-Tenths catalogue (en) ) LHS 3490 (Luyten Half-Second catalogue (en) ) LSPM J1950+0852 (LSPM-NORTH catalog (en) ) LTT 15795 (Luyten Two-Tenths catalogue (en) ) N30 4388 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ) NLTT 48314 (New Luyten Two-Tenths catalogue (en) ) NSV 24910 (New Catalogue of Suspected Variable Stars (es) ) PLX 4665 (General Catalogue of Trigonometric Stellar Parallaxes (es) ) PLX 4665.00 (General Catalogue of Trigonometric Stellar Parallaxes (es) ) PMC 90-93 530 (Tokyo Photoelectric Meridian Circle Catalog (en) ) PPM 168779 (Catálogo de estrellas PPM (es) ) RAFGL 2463 (The Revised AFGL (RAFGL) catalogue (en) ) ROT 2857 (Catalogue of rotational velocities of the stars (en) ) TD1 25537 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ) TYC 1058-3399-1 (Tycho Catalogue (en) ) UBV 16885 (UBV Photoelectric Photometry Catalogue (en) ) uvby98 100187642 (uvbyβ Photoelectric Photometric Catalogue (en) ) alf Aql (General Catalogue of Variable Stars) WDS J19508+0852A (Catálogo de Estrellas Dobles Washington (es) ) Zkh 297 (Catálogo Zakhozhaj (es) ) Ci 20 1169 (Catalogue of proper motion stars (en) ) PM 19484+0844 (Catalogs of proper-motion stars. I. Stars brighter than visual magnitude 15 and with annual proper motion of 1" or more (en) ) WEB 17173 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ) 53 Aql (Denominación de Flamsteed (es) ) TIC 70257116 (TESS Input Catalog (en) ) AG+08 2636 (AGK3U (en) ) UBV M 24205 (UBV Photoelectric Photometry Catalogue (en) )

Altair ye una estrella mui luminosa, de primer magnitú, que s'asitia na constelación del Aigla (Aquilae). Ta cerquina la Tierra, a unos 15,4 años-lluz, y eso ye lo que la fai tan resplandiente, porque realmente ye una estrella tirando a débil.