| Supernova: SN1996aa | |
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| Discovery Date: | 16 May 1996 |
| SN Type: | Ia |
| Apparent Magnitude: | 17.0 |
| Offset from Center: | 5" West 3" North |
| IAUC Announcement: | 6403 |
| Discoverers: | W. Johnson |
| Galaxy: NGC5557 | |
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| Constellation: | Bootes |
| Right Ascension: | 14 : 18.4 (hours : minutes) |
| Declination: | +36 : 30 (degrees : minutes) |
| Apparent Magnitude: | 11.1 |
| Apparent Diameter: | 2.4 (arc minutes) |
| Galaxy Classification: | E2 |
| Dreyer's description: | cB, S, R, vsbM * |