1           1953-03-28.21  Groeneveld & Kuiper (1954) 
 2           1953-03-31.28  Groeneveld & Kuiper (1954) 
 3           1953-04-02.30  Groeneveld & Kuiper (1954) 
 4           1953-04-19.23  Groeneveld & Kuiper (1954) 
 5           1955-12-23.19  van Houten-Groeneveld & van Houten (1958) 
 6           1955-12-24.35  van Houten-Groeneveld & van Houten (1958) 
 7           1955-12-25.28  van Houten-Groeneveld & van Houten (1958) 
 8           1977-07-19.86  Lupishko et al. (1979) 
 9           1977-07-20.81  Lupishko et al. (1979) 
10           1977-07-21.84  Lupishko et al. (1979) 
11           1977-07-22.81  Lupishko et al. (1979) 
12           1977-07-23.82  Lupishko et al. (1979) 
13           1977-07-25.84  Lupishko et al. (1979) 
14           1977-07-26.80  Lupishko et al. (1979) 
15           1977-07-27.79  Lupishko et al. (1979) 
16           1977-08-02.80  Lupishko et al. (1979) 
17           1977-08-08.80  Lupishko et al. (1979) 
18           1977-08-09.76  Lupishko et al. (1979) 
19           1981-07-27.23  Harris et al. (1992) 
20           1984-04-04.83  Lupishko et al. (1989) 
21           1985-09-02.71  Michałowski et al. (1995) 
22           1985-09-03.73  Michałowski et al. (1995) 
23           1985-09-05.69  Michałowski et al. (1995) 
24           1985-09-06.66  Michałowski et al. (1995) 
25           1985-09-27.08  Michałowski et al. (1995) 
26           1985-09-28.10  Michałowski et al. (1995) 
27           1993-09-19.25  Lagerkvist et al. (1995) 
28           1993-09-22.27  Lagerkvist et al. (1995) 
29           1993-09-23.03  Michałowski et al. (1995) 
30           1993-09-23.20  Lagerkvist et al. (1995) 
31           1993-09-24.19  Lagerkvist et al. (1995) 
32           1993-10-07.84  Denchev et al. (1998) 
33           1993-10-07.84  Denchev et al. (1998) 
34           1993-10-07.87  Michałowski et al. (1995) 
35           1993-10-08.93  Denchev et al. (1998) 
36           1993-10-08.93  Denchev et al. (1998) 
37           1993-10-08.93  Denchev et al. (1998) 
38           1993-10-08.97  Michałowski et al. (1995) 
39           1993-10-16.86  Michałowski et al. (1995) 
40           1993-10-17.91  Michałowski et al. (1995) 
41           1993-10-19.87  Michałowski et al. (1995) 
42           1993-10-20.79  Michałowski et al. (1995) 
43           1993-11-10.83  Michałowski et al. (1995) 
44           1993-11-12.78  Michałowski et al. (1995) 
45           1993-11-15.74  Michałowski et al. (1995) 
46           1994-11-13.05  Michałowski et al. (1995) 
47           1995-01-09.04  Michałowski et al. (1995) 
48           1995-01-21.76  Michałowski et al. (1995) 
49           1995-01-31.29  Michałowski et al. (1995) 
50           1995-02-01.26  Michałowski et al. (1995) 
51           1995-02-03.26  Michałowski et al. (1995) 
52           1995-02-04.31  Michałowski et al. (1995) 
53  1997-12-31--2004-06-30  USNO