| Event type | Supernova  |
|---|---|
| SN Ib[1] | |
| Date | October 2, 1999[2] |
| Constellation | Canis Major |
| Right ascension | 06h16m 16.16s[2] |
| Declination | −21° 22′ 09.8″[2] |
| Epoch | J2000.0 |
| Galactic coordinates | 228.6723 -17.0277 |
| Distance | 31.3 Mpc[1] |
| Host | NGC 2207) |
| Progenitor | 38M☉ star |
| Peak apparent magnitude | 17.9[3] |
| Other designations | SN 1999ec |
SN 1999ec was a type Ib supernova that was discovered in the interacting galaxy NGC 2207 on October 2, 1999.[2] It was found on images taken with the Katzman Automatic Imaging Telescope at the Lick Observatory.[2] The progenitor is estimated to have had 38 times the mass of the Sun and was 5.34 million years old at the time of the outburst.[1]
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