1           1982-09-21.29  Harris et al. (1999) 
2           1982-09-22.38  Harris et al. (1999) 
3           1982-10-13.21  Harris et al. (1999) 
4           1991-08-04.12  Lagerkvist et al. (1992) 
5           1991-08-05.14  Lagerkvist et al. (1992) 
6  1998-02-26--2007-03-06  USNO 
7  2003-05-06--2010-11-10  Catalina