| Date | Conf. | Sources |
| 1990 Feb. 26 | A | RX Boo, U Her, OH 39.7+1.5, |
| OH 83.4-0.9, VX Sgr | ||
| 1990 Jun. 3 | A | RX Boo, U Her, OH 39.7+1.5, |
| OH 83.4-0.9, VX Sgr | ||
| 1991 Aug. 23 | A | OH 39.7+1.5 |
| 1991 Oct. 20 | BnA | RX Boo, U Her |
| 1992 Jan. 10 | B | VX Sgr, NML Cyg |
| 1992 Dec. 28 | A | RX Boo, U Her, OH 39.7+1.5 |
| 1995 Sep. 5 | A | RX Boo |
| 1996 Dec. 10 | A | OH 26.5+0.6 |
| 1998 May 31 | A | OH 26.5+0.6 |