1           1990-10-12.20  Barucci et al. (1994) 
2           1990-10-13.25  Barucci et al. (1994) 
3           1990-10-18.19  Barucci et al. (1994) 
4  1998-05-08--2007-06-30  USNO 
5  2003-11-21--2008-09-06  Catalina