观测地点：浙江安吉天荒坪，江南天池
参与学校：上海高校天文联盟以及申空追星会
集合时间与地点：2012年12月15日市区的同学9：00于人民广场博物馆正门口（靠近延安路高架）集合9:30发车；闵行大学城同学10:15交大庙门集合,10:30发车；奉贤大学城同学于10:20在华理北侧门集合。
回程时间：12月16日上午9:30天荒坪发车返沪
食宿：12月15日及16日午餐自理，15日晚餐及16日早餐在农家乐。夜宿农家乐或者帐篷（自行选择）。鉴于腐败党们的建议，本次活动提供烧烤项目作为夜宵（自选）。（满十人起订）
必备品：饮料、零食、手电、防寒衣物（晚上预计-50度，强烈建议羽绒服羊毛衫等）
观测与拍摄仪器：信达200F4牛反、信达150F5牛反（小蓝）、博冠150马卡；大观152F4.5牛反、信达130牛反、信达80900普消折射、博冠70900折射等。其他老样子：拍摄党器材自备~腐败党道具自备~
主要观测目标： 18:00 开始观测
M31 (Andromeda Galaxy; NGC224 3.5)
M33 (Triangulum Galaxy; NGC598 7.0)
NGC 6992; NGC6960 ( D.N. 7.0)
NGC 7000(4.0 D.N)
NGC 884(6.1); NGC869 (5.3)(O.C.)
Jupiter(-2.1) (Io; Europa; Callisto; Ganymede)
Pleiades (Seven Sisters, M45, 1.4)
Orion Nebula (M42 D.N, 5.0)
NGC 1977 (7.0) (O.C)
NGC 1981 (4.2) (O.C)
NGC 1975 (7.0) (D.N)
NGC 1973 (7.0) (D.N)
EBN 756 (5.0)(D.N)
M35(5.1) (O,C)
M41(4.0)(O.C)
Beehive Cluster (M44 4.0）
M3 (6.5) (G.C)
Saturn（0.9）(Titan 9.1)
Venus (-4.5)
Sun Rise （-26.7）
以及双子流星雨（上次狮子座平均每人看到10-20颗流星左右）；教大家认识秋、冬和初春的三个季节的星空
费用说明：车费： 120；餐饮：35（D1晚饭+D2早饭）；农家乐50元/人（有空调洗澡）；帐篷60元/顶（含两张防潮垫，可以睡两个、三个或者坐四个人聊天）；烧烤25元/人（自选）。
备注：
1.报名者预收120元/人车费作为押金，若是因为个人原因不能去的将不退还；
2.本次活动人数限制在两辆车（108人）之内，报名以及器材分配遵循先来后到原则；
3.视天气情况，活动会取消或者顺延一周至12月22日。
上海高校天文联盟
2012.12.2
关于双子座流星雨
Active: December 4—17; Maximum: December 13, 23h30m UT (λ⊙ = 262.2°); ZHR = 120;
Radiant: α = 112°, δ = +33°; Radiant drift: see Table 6;
V∞ = 35 km/s; r = 2.6;
TFC: α = 87°, δ = +20° and α = 135°, δ = +49° before 23h local time,
α = 87°, δ = +20° and α = 129°, δ = +20° after 23h local time (β > 40° N);
α = 120°, δ = −3° and α = 84°, δ = +10° (β < 40° N).
IFC: α = 150°, δ = +20° and α = 60°, δ = +40° (β > 20° N);
α = 135°, δ = -5° and α = 80°, δ = 0° (β < 20° N). |
One of the finest, and probably the most reliable, of the major annual showers presently observable, whose peak this year falls perfectly for new Moon. Well north of the equator, the radiant rises about sunset, reaching a usable elevation from the local evening hours onwards. In the southern hemisphere, the radiant appears only around local midnight or so. It culminates near 02h. Even from more southerly sites, this is a splendid stream of often bright, medium-speed meteors, a rewarding event for all observers, whatever method they employ. The peak has shown slight signs of variability in its rates and timing in recent years, with the more reliably-reported maxima during the past two decades (HMO, p. 171) all having occurred within λ⊙ = 261.5° to 262.4°, 2012 December 13, 07h to December 14, 04h UT. Near-peak rates usually persist for almost a day, so much of the world has the chance to enjoy something of the Geminids’ best. Some mass-sorting within the stream means fainter telescopic meteors should be most abundant almost a day ahead of the visual maximum, with telescopic results indicating such meteors radiate from an elongated region, perhaps with three sub-centres. Further results on this topic would be useful.
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