1           1979-01-15.98  Zappala et al. (1983) 
 2           1979-01-16.80  Zappala et al. (1983) 
 3           1982-06-22.49  Weidenschilling et al. (1990) 
 4           1982-06-22.93  Weidenschilling et al. (1990) 
 5           1983-06-28.41  Weidenschilling et al. (1990) 
 6           1983-06-28.54  Weidenschilling et al. (1990) 
 7           1983-06-28.69  Weidenschilling et al. (1990) 
 8           1983-06-28.81  Weidenschilling et al. (1990) 
 9           1983-06-29.05  Weidenschilling et al. (1990) 
10           1983-09-04.93  Haupt & Hanslmeier (1985) 
11           1983-09-08.98  Haupt & Hanslmeier (1985) 
12           1983-09-13.38  Weidenschilling et al. (1990) 
13           1983-09-13.48  Weidenschilling et al. (1990) 
14           1983-09-13.62  Weidenschilling et al. (1990) 
15           1983-09-13.94  Weidenschilling et al. (1990) 
16           1983-10-14.25  Weidenschilling et al. (1990) 
17           1983-10-14.58  Weidenschilling et al. (1990) 
18           1983-10-14.82  Weidenschilling et al. (1990) 
19           1983-11-13.17  Weidenschilling et al. (1990) 
20           1989-11-22.33  Weidenschilling et al. (1990) 
21           1993-07-24.18  Hainaut-Rouelle et al. (1995) 
22           1994-08-03.33  Piironen et al. (1998) 
23           1994-08-04.34  Piironen et al. (1998) 
24           1994-08-12.29  Piironen et al. (1998) 
25           1994-08-13.22  Piironen et al. (1998) 
26           1994-08-15.26  Piironen et al. (1998) 
27           1994-08-27.28  Piironen et al. (1998) 
28           1994-09-02.28  Piironen et al. (1998) 
29  1999-06-22--2008-02-11  USNO 
30  2005-09-26--2007-05-21  Catalina 
31  2004-03-16--2005-06-03  Siding Spring