Evolution of the Geminids Observed Over 60 Years

Details Evolution of the Geminids Observed Over 60 Years Evolution of the Geminids Observed Over 60 Years

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004em%26p...95...27r&link_type=abstract

Earth, Moon, and Planets, Volume 95, Issue 1-4, pp. 27-32

Physics

4

Geminids, Meteoroid Stream

Scientific paper

Visual observations collected over 60 years (1944 2003) are analysed. The profiles and values of the population index near the activity peak are rather constant over the entire period and confirm the strong mass segregation within the stream. The peak activity is characterized by a plateau in the profile with a ZHR between 120 and 130 lasting for about 12 h between λ&sun;=261.5° and 262.4° (J2000). This is consistent with an age of the Geminid stream of about 6000 years. The position of this plateau is constant. Variations of the ZHR by more than 10% within the peak period are found in data of well-observed returns. These structures of about 0.2° duration can be traced over more than a decade with an average drift of about -0.02° in solar longitude per year

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