<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: I-Passage: I-Alpha Gruis inekilasi lezinkanyezi elingu-B6 V, yize eminye imithombo iyinikeza ukuhlukaniswa kwe-B7 IV. Ukwahlukaniswa kokuqala kubonisa ukuthi lena inkanyezi yohlobo B ekulandelaneni okuyinhloko kwezinkanyezi ezikhiqiza amandla ngokuhlanganiswa kwe-hydrogen enkanjini. Kodwa-ke, isigaba sokukhanya esingu-IV singasho ukuthi lena inkanyezi engaphansi; okusho ukuthi ukunikezwa kwe-hydrogen enkabeni yayo kuyaphela futhi inkanyezi isiqalile inqubo yokuziphendukela kwemvelo kude nokulandelana okuyinhloko. Ayinazo izihlobo ezaziwayo. I-angular diameter elinganisiwe yale nkanyezi, ngemuva kokulungisa ukufiphala kwemikhawulo, ingu-1.02 0.07 mas. Ebudeni obulinganiswa nge-parallax yeminyaka yokukhanya engu-101 31 parsecs ukusuka eMhlabeni, lokhu kunikeza usayizi ongokoqobo ophindwe izikhathi ezingu-3.4 ububanzi beLanga. Iphenduka ngokushesha, ngesivinini sokujikeleza esicatshangelwayo esingaba ngu-215 km s esinikeza umkhawulo ophansi wezinga lokujikeleza kwe-azimuthal eduze nenkabazwe. Le nkanyezi inesisindo esiphindwe kane seLanga futhi ikhipha ukukhanya okuphindwe izikhathi ezingaba ngu-520 kunelanga. Izinga lokushisa langaphandle le-Alpha Gruis lingu-13,920 K, okwenza kube nombala omhlophe oluhlaza okwesibhakabhaka ohlukile kwezinkanyezi zohlobo B. Ubuningi bezinye izakhi ngaphandle kwe-hydrogen ne-helium, lokho izazi zezinkanyezi ezikubiza ngokuthi yi-metallicity, cishe bungu-74 wobuningi beLanga. Ngokusekelwe eminyakeni ecatshangelwayo nokunyakaza, kungenzeka ukuthi uyilungu leqembu elihambayo le-AB Doradus elihlanganyela ukunyakaza okuvamile emkhathini. Leli qembu lineminyaka engaba yizigidi ezingama-70 ubudala, okuhambisana neminyaka engu-100 yeminyaka ecatshangelwayo ye-α Gruis ivumela i-margin yephutha. Izakhi zejubane lesikhala sale nkanyezi ohlelweni lwe-Galactic coordinate U, V, W 7.0 1.1, 25.6 0.7, 15.5 1.4 km s. Umbuzo: Zingaki iminyaka yokukhanya?  <response>: 101 izinga 