1           1978-04-04.20  Vesely & Taylor (1985) 
 2           1985-11-14.17  Lagerkvist et al. (1987) 
 3           1987-02-28.20  Magnusson & Lagerkvist (1991) 
 4           1987-03-01.26  Magnusson & Lagerkvist (1991) 
 5           1987-03-04.26  Magnusson & Lagerkvist (1991) 
 6           1987-03-06.18  Magnusson & Lagerkvist (1991) 
 7           1993-09-19.13  Lagerkvist et al. (1995) 
 8           1993-09-23.15  Lagerkvist et al. (1995) 
 9           1993-09-24.16  Lagerkvist et al. (1995) 
10           2007-12-07.16  Ďurech et al. (2009) 
11           2007-12-25.18  Ďurech et al. (2009) 
12           2007-12-30.17  Ďurech et al. (2009) 
13           2007-12-07.08  Ďurech et al. (2009) 
14           2007-12-11.11  Ďurech et al. (2009) 
15           2007-12-12.99  Ďurech et al. (2009) 
16           2008-01-03.08  Ďurech et al. (2009) 
17  1998-08-26--2004-03-14  USNO