1           1994-06-05.31  Dahlgren et al. (1998) 
2           1994-06-06.28  Dahlgren et al. (1998) 
3           1994-06-07.28  Dahlgren et al. (1998) 
4           1994-06-08.27  Dahlgren et al. (1998) 
5  1999-02-09--2008-06-10  USNO 
6  2003-11-24--2010-11-09  Catalina