1           1990-10-14.20  Barucci et al. (1994) 
2           1990-10-15.21  Barucci et al. (1994) 
3           1990-10-18.19  Barucci et al. (1994) 
4  1999-01-10--2003-08-06  USNO 
5  2005-12-05--2008-02-02  Catalina