2009年12月份月掩星
十二月份精選 (5 cm 口徑望遠鏡可見),預報採用香港標準時間
day Time P Star Sp Mag Mag % Elon Sun Moon CA PA VA AA
年 月 日 時 分 秒 No D v r V ill Alt Alt Az o o o o
09 Dec 1 20 42 49 D 545 B6 4.1 4.2v 99+ 169 52 79 62N 69 153 83
R545 = Merope = 23 Tauri = 昴宿五
545 = V0971 Tau, 4.18, range 0.01 to ( 0.01V, Type BCEP
Distance of 545 to Terminator = 14.3"; to 3km sunlit peak = 4.7"
09 Dec 1 21 25 56 D 552SB7 2.9 2.9S 99+ 169 62 80 51N 59 147 73
R552 = Alcyone = eta Tauri = 昴宿六
552 is multiple: AB 3.0 4.6 0.031" 207.1 : AB 1.6 0.031"207.1 : AB 2.9 6.3 117" 290.1 : AC 2.9 8.3 181" 312.0
552 = NSV 15775, 2.87V, Type VAR:
Distance of 552 to Terminator = 10.5"; to 3km sunlit peak = 2.3"
09 Dec 1 22 21 46 D 560cB8 3.6 3.7s 99+ 169 74 80 89N 98 192 112
R560 = Atlas = 27 Tauri = 昴宿七
560 is double: AB 3.8 6.8 0.003" 279.2
560 = NSV 01345, 3.60 to 3.65V
09 Dec 1 22 22 30 d 561cB7 5.1 5.1V 99+ 169 74 80 72N 81 175 95
R561 = Pleione = 28 BU Tauri = 昴宿增十二
561 is double: AB 5.1 0.20" 311.9
561 = BU Tau, 4.77 to 5.50V, Type GCAS
Distance of 561 to Terminator = 15.0"; to 3km sunlit peak = 5.2"
09 Dec 26 23 56 59 D 221cG8 3.8 s 68+ 111 28 276 72N 52 340 74
R221 = Kullat Nunu = eta Piscium = 右更二
221 is double: AB 3.8 7.5 0.53" 52.7
221 = NSV 00532, 3.59 to 3.65V
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