Achernar

Achernar
Cineál	déréalta, near-IR source (en) , réalta athraitheach rothlach agus UV-emission source (en)
Cineál speictreach (réalta)	B6Vpe
Réad linbh	Alpha Eridani II (en)
Réaltbhuíon	An Abhainn
Aois	J2000.0
Saintréithe fisiceacha agus réaltmhéadracha
Fad ón Domhan	44.091710758377 pc
Ga	7.3 R☉
Leacú	0.75
Dearbhmhéid	−2.77
Méid dhealraitheach (V)	0.46 (banda V)
Mais	6.7 M☉
Teocht éifeachtach	15,000 K
Saobhdhiallas	23.39 mas
Dualghluaisne (diallas)	−38.24 mas/y
Dualghluaisne (dronairde)	87 mas/y
Luas rothlaithe réaltach	250 km/s
Luas gathach	18.6 km/s
Imtharraingt dromchla	3,980 cm/s²
Dronairde (α)	1h 37m 42.8455s
Diallas (δ)	-57° -14′ -12.3101″
Lonrachas	1,076 solar luminosity (en)
Aois measta	37.3 megaannum (en)
Catalóga réalteolaíochta
	2MASS J01374284-5714119 (2MASS); GSC 08478-01395 (Guide Star Catalog (en) ); HD 10144 (Henry Draper Catalogue (en) ); HIP 7588 (Hipparcos Catalogue (en) ); HR 472 (Bright Star Catalogue (en) ); IRAS 01358-5729 (IRAS (en) ); SAO 232481 (Smithsonian Astrophysical Observatory Star Catalog (en) ); α Eri (Bayer designation (en) ); ALS 16724 (Catalog of Galactic OB Stars (en) ); CD-57 316 (Cordoba Durchmusterung (en) ); CPC 20 447 (Cape Photographic Catalogue (en) ); CPD-57 334 (Cape Photographic Durchmusterung (en) ); FK5 54 (FK5 (en) ); GC 1979 (Boss General Catalogue (en) ); GCRV 916 (General Catalogue of Stellar Radial Velocities (en) ); HIC 7588 (Hipparcos Input Catalogue (en) ); JP11 517 (JP11 (en) ); N30 335 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ); NSV 15353 (New Catalogue of Suspected Variable Stars (en) ); PLX 344 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); PLX 344.00 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); PPM 331199 (PPM Star Catalogue (en) ); ROT 233 (Catalogue of rotational velocities of the stars (en) ); TD1 938 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ); UBV 1700 (UBV Photoelectric Photometry Catalogue (en) ); UBV M 8330 (Photoelectric catalogue, magnitudes and colors of stars in the UBV and UCBV systems (en) ); uvby98 100010144 (uvbyβ Photoelectric Photometric Catalogue (en) ); alf Eri (General Catalogue of Variable Stars); TYC 8478-1395-1 (catalóg Tycho-2); [JE82] 39 (A catalogue of Be stars (en) ); WEB 1623 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ); 70 Eri (Flamsteed designation (en) )

Is é Achernar (α Eri, Alfa Eridani) an réalta is gile ar réaltbhuíon na hAbhann, agus tá sé an deichiú (10ú) réalta is gile ar spéir na hoíche. Tá sé suite in aice leis an bpointe is faide ó dheas ar an réaltbhuíon.