Beta Comae Berenices

Beta Comae Berenices
Constelación Cabellera de Berenice
Ascensión recta α 13h 11min 52,39s
Declinación δ +27º 52’ 41,5’’
Distancia 29,9 ± 0,2 años luz
Magnitud visual +4,23
Magnitud absoluta +4,42
Luminosidad 1,37 soles
Temperatura 6000 K
Masa 1,1 soles (aprox)
Radio 1,10 soles
Tipo espectral G0V
Velocidad radial +6,1 km/s

Beta Comae Berenices (β Com / 43 Com / HD 114710) es la estrella más brillante de la constelación de Cabellera de Berenice, con magnitud aparente +4,23. Relativamente próxima al sistema solar, se encuentra a solo 29,9 años luz de distancia. La estrella conocida más cercana a ella es GJ 3801, distante 4,5 años luz.[1]

Beta Comae Berenices es una enana amarilla no muy distinta del Sol cuyo tipo espectral es G0V.[2]​ Con una temperatura efectiva de 6000 K, es unos 280 K más caliente que el Sol, siendo un 37% más luminosa que este. Su parámetros de masa y diámetro son un 10% mayores que los del Sol. Su metalicidad —medida por el contenido de hierro en relación con el de hidrógeno— parece ser mayor que la solar, en torno a un 7%.[3]​ Con una velocidad de rotación doble que la del Sol, presenta también actividad magnética, incluyendo erupciones y manchas estelares, en un ciclo de 16,6 años y un posible ciclo secundario de 9,6 años. Aunque más joven que el Sol, no hay acuerdo sobre su edad, que según la fuente consultada puede ser de 1700, 4100 o 4400 millones de años.[1]

Beta Comae Berenices puede tener una compañera estelar próxima, detectada solo por espectroscopia, que no ha sido confirmada.[4][3]​ Estudios llevados a cabo mediante la técnica de velocidad radial no han detectado planetas a su alrededor.[1]

Véase también

Referencias

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