Beta Lacertae

Beta Lacertae

Classe spettrale	G9 III bCa1^[1]
Distanza dal Sole	170 anni luce
Costellazione	Lucertola
Coordinate
(all'epoca J2000)
Ascensione retta	22^h 23^m 33^s
Declinazione	52° 13′ 44″
Lat. galattica	-4,3°
Long. galattica	101,26°
Dati fisici
Raggio medio	10,7^[2] R_⊙
Massa	1,85^[1] M_⊙
Temperatura superficiale	4710 K^[1] (media)
Luminosità	60 L_⊙
Indice di colore (B-V)	+1,015(B-V)
Metallicità	[Fe/H] = 47% del Sole^[1]
Età stimata	1300 milioni di anni^[1]
Dati osservativi
Magnitudine app.	+4,42
Magnitudine ass.	+0,67
Parallasse	0,00192 sec
Moto proprio	-0,00148(in AR) -0,18646(in Dec)
Velocità radiale	-10,4 km/s
Nomenclature alternative
3 Lac, HD 212496, HIP 110538, PPM 40598, SAO34395, HR 8538
Modifica dati su Wikidata · Manuale

Beta Lacertae (β Lacertae, β Lac) è una stella della costellazione della Lucertola, situata nella parte settentrionale della costellazione, proprio all'apice nord del disegno serpentino di stelle che designa la parte visibile della costellazione.

È anche stella doppia, designata come CHR 108, la cui compagna è separata da soli 0,2 secondi d'arco e angolo di posizione pari a 168°.

Caratteristiche fisiche

La stella è una gigante gialla di tipo spettrale G8,5 III, con una massa 1,85 volte quella del Sole ed un raggio quasi 11 volte superiore, mentre la sua metallicità è molto inferiore a quella del Sole, con valori stimati che arrivano al massimo a [Fe/H]= -0,33.

Note

^ ^a ^b ^c ^d ^e Yoichi TAKEDA et al., Stellar Parameters and Elemental Abundances of Late-G Giants (PDF), in Publications of the Astronomical Society of Japan, vol. 60, n. 4, pp. 781-802.
^ Tyler E. Nordgren et al., Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer, in Astronomical Journal, vol. 118, n. 6, dicembre 1999, pp. 3032–3038, DOI:10.1086/301114.

Collegamenti esterni

(EN) Scenta, su scenta.co.uk. URL consultato il 14 gennaio 2008 (archiviato dall'url originale il 10 ottobre 2008).
Software astronomico: Megastar 5.0

Portale Stelle: accedi alle voci di Wikipedia che trattano di stelle e costellazioni

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