1  1954-01-10.39  Groeneveld & Kuiper (1954) 
 2  1954-01-17.37  Groeneveld & Kuiper (1954) 
 3  1954-01-28.33  Groeneveld & Kuiper (1954) 
 4  1958-01-14.20  Gehrels & Owings (1962) 
 5  1970-10-11.38  Birch & Taylor (1989) 
 6  1973-06-15.23  Birch & Taylor (1989) 
 7  1973-06-15.22  Birch & Taylor (1989) 
 8  1979-10-15.43  Harris et al. (1989) 
 9  1979-12-10.44  Harris et al. (1989) 
10  1979-12-11.43  Millis et al. (1981) 
11  1979-12-11.42  Millis et al. (1981) 
12  1979-12-16.35  Harris et al. (1989) 
13  1980-02-09.37  Schroll et al. (1981) 
14  1980-02-09.36  Schroll et al. (1981) 
15  1980-02-09.33  Schroll et al. (1981) 
16  1980-02-09.46  Schroll et al. (1981) 
17  1980-02-09.48  Schroll et al. (1981) 
18  1983-10-24.95  di Martino et al. (1987) 
19  1983-10-25.98  di Martino et al. (1987) 
20  1985-03-19.82  Birch & Taylor (1989) 
21  1985-03-21.63  Birch & Taylor (1989) 
22  1985-03-26.70  Birch & Taylor (1989) 
23  1985-03-29.68  Birch & Taylor (1989) 
24  1985-04-12.66  Birch & Taylor (1989) 
25  1985-04-18.60  Birch & Taylor (1989) 
26  1985-04-19.60  Birch & Taylor (1989) 
27  1985-04-20.54  Birch & Taylor (1989) 
28  2015-04-03.91  Viikinkoski et al. (2015)