สำนักราชบัณฑิตยสภา

นิ พนธ์ ทรายเพชร วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๑ ม.ค.-มี.ค. ๒๕๕๕ 95 Abstract Two Total Lunar Eclipses in 2011 Nibondh Saibejra Fellow of the Academy of Science, The Royal Institute, Thailand A total lunar eclipse will take place on June 15, 2011 after midnight. Thus it will be June 16, 2011 in Thailand. Penumbral lunar eclipse begins at 00:23:05 (hr:mn:sc) local time. Partial lunar eclipse begins at 01:22:37. Total lunar eclipse will take place at 02:22:11 and end at 04:03:22. The partial lunar eclipse will end at 05:02:35. And the penumbral partial eclipse ends at 06:02:15. The duration of the total lunar eclipse is 1 hour 40 minutes 52 seconds. The eclipse will be visible completely over Africa and Central Asia, visible rising over South America, western Africa and Europe, and setting over eastern Asia. In western Asia, Australia and the Philippines, the lunar eclipse will be visible just before sunrise. Another total lunar eclipse will take place on December 10, 2011. It will be visible from all of Asia and Australia, seen as rising over eastern Europe, and setting over northwest North America. Penumbral lunar eclipse begins at 18:33:36 local time. Partial lunar eclipse begins at 19:45:43. Total lunar eclipse will take place at 21:06:16 and will end at 21:57:24. Partial lunar eclipse ends at 23:17:58. Penumbral lunar eclipse ends at 00:29:57 of December 11, 2011. The duration of total lunar eclipse is 51 minutes 8 seconds. Key words: total lunar eclipse, partial lunar eclipse, penumbral lunar eclipse