1           2003-04-20.35  Stephens (2003) 
2           2003-04-25.19  Stephens (2003) 
3           2003-04-27.27  Stephens (2003) 
4           2003-04-28.18  Stephens (2003) 
5           2003-05-01.30  Stephens (2003) 
6           2003-05-02.28  Stephens (2003) 
7  1998-02-14--2003-06-11  USNO