1           1979-07-31.35  Harris & Young (1983) 
2           1979-08-17.30  Carlsson & Lagerkvist (1981) 
3           1979-08-18.40  Carlsson & Lagerkvist (1981) 
4           1979-08-20.18  Carlsson & Lagerkvist (1981) 
5  1997-11-24--2008-02-02  USNO