1           1988-02-16.36  Wisniewski et al. (1997) 
2           1988-02-17.37  Wisniewski et al. (1997) 
3  1998-03-04--2004-02-16  USNO 
4  2006-11-11--2008-06-06  Catalina 
5  2006-09-30--2008-03-27  Mt. Lemmon