發信人: jses1.bbs@ptt.cc (冠翔) 看板: astronomy
標  題: Re: [新聞] 澳洲發現新彗星 週五南半球看得最清楚
發信站: 批踢踢實業 (2011/12/16 Fri 20:36:00)

2011/12/15
COMET LOVEJOY UPDATE: Matthew Knight of the Lowell Observatory and JHU-APL
reports: "As of 16:30 UT on Dec. 15th, Comet Lovejoy has reached magnitude
-3, possibly brighter. It is starting to saturate SOHO images even with
narrow filters and shorter than normal exposure times." The comet is now
brighter than Jupiter, but not quite as bright as Venus. If these
developments continue apace, Comet Lovejoy could become visible to the naked
eye in broad daylight before the end of Dec. 15th. See the news item below
for further discussion of this possibility.
在UTC12/15 16:30時，這顆彗星的亮度達到-3等或是更亮...(略)
若是亮度持續增加，12/15結束以前的白天有機會直接看見

2011/12/16
COMET LOVEJOY SURVIVES: Incredibly, sungrazing Comet Lovejoy appears to have
survived its close encounter with the sun. Lovejoy flew only 140,000 km over
the stellar surface during the early hours of Dec. 16th. NASA's Solar
Dynamics Observatory caught the comet emerging from perihelion (closest
approach).
Curiously, the comet seems to have lost its tail in transit through the sun's
atmosphere. A decapitated remnant tail can still be seen tracing Comet
Lovejoy's path into the sun, but the exiting comet has no obvious trail of
dust behind it.
在12/16稍早的時間，彗星Lovejoy以只有140,000公里的近距離掠過太陽，並且難以置信
地存活下來...(略)
奇特的是，彗星在經過太陽大氣層時失去了尾巴。進入太陽背面前遺留的彗尾痕跡仍可
以看見，但出來的彗星背後已經沒有明顯的塵埃尾跡。

http://spaceweather.com/archive.php?view=1&day=15&month=12&year=2011
http://spaceweather.com/archive.php?view=1&day=16&month=12&year=2011

SOHO的LASCO C3視野中可以很明顯地看見彗星進入太陽背面以及出現
http://spaceweather.com/images2011/16dec11/lovejoy_c3_anim.gif

SDO影像中顯示彗星近掠太陽時忍受的坎坷之路
http://spaceweather.com/images2011/16dec11/ipad/comet_whoosh.m4v

SDO影像捕捉到通過近日點後再度出現的彗星Lovejoy
http://sdoisgo.blogspot.com/2011/12/phoenix-comet-emerges.html

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 140.112.252.177