A=2tan -1 (a/2f)*2tan -1 (b/2f) LM=2.512log 10 (g*f -1 *d 2 )-9.95 X=A*(d 2 *f -1 ) 1.21 *f 0.056 *10-4 LM 800 =2.512log 10 (800*50-1 *27.8 2 )- 9.95=+0.33 LM 400 =2.512log 10 (400*50-1 *27.8 2 )- N=A*(d 2 *f -1 ) 1.35 *f 0.056 *4*10-6 9.95=-0.43
1.Handbook for Visual Meteor Observers, 3/e Edited by Jurgen, Rainer Arlt and Alastair McBeath, International Meteor Organization 2.HandBook for Photographic Meteor Observations, Jurgen Rendtel, International Meteor Organization 3.Observing Hints for the 1998 Leonid Return, Rainer Arlt, Sirko Molau, Malcolm Currie, WGN, the JOURNAL of the IMO 26:4(1998) 4.The Leonids Bulletion 12 of the International Leonid Watch:Final Results of the 1997 Leobuds and Prospects for 1998, Rainer Arlt and Peter Brown, WGN, the JOURNAL of the IMO 26:4(1998) 5.The Return of the Leonid Meteors, Joe Rao, Sky & Telscope, Nov., 1998 6.Awaiting the Storm, Joe Rao, Sky & Telscope, Mar., 1999 7.Hawkings G., 1964:Meteors, Comets & Meteorites. McGraw-Hill Book Co.
1.Schlosser,W.,Schmidt-Kaler,T.,andMilone,E.F.1991."ChallengesofAstronomy". (Springer-Verlag New York Inc.) 2.Morrison,D.and Owen,T.1987."The Planetary System".(Addison-Wesley Publishing Company)
Astronomical Classroom
Astronomical Laboratory