| # | Title | Status | Researcher | Start date | End date | Requested data types |
|---|---|---|---|---|---|---|
| 271 | Alert Notice 271: 1749-19 N? Sgr 00 - possible nova in Sagittarius | Archived | AAVSO | 2000-02-04 (UTC) | 2000-02-23 (UTC) | Spectroscopy, Photometry |
| 270 | 2036+65 Supernova 2000E in NGC 6951 in Cepheus | Archived | AAVSO | 2000-01-26 (UTC) | 2000-01-28 (UTC) | Spectroscopy, Photometry |
| 269 | 0735-40 CGCS 1825 - NEW RED VARIABLE IN PUPPIS | Archived | AAVSO | 2000-01-07 (UTC) | 2000-01-14 (UTC) | Photometry |
| 268 | 1216+05 Supernova 1999gn in NGC 4303 = M61 | Archived | AAVSO | 1999-12-17 (UTC) | 1999-12-20 (UTC) | Photometry |
| 264 | 1918+04 Nova Aquilae 1999 Number 2 | Archived | AAVSO | 1999-12-01 (UTC) | 1999-12-02 (UTC) | Photometry |
| 265 | Alert Notice 265: 1918+04 Nova Aquilae 1999 Number 2 = V1494 Aql | Archived | AAVSO | 1999-12-01 (UTC) | 1999-12-02 (UTC) | Spectroscopy |
| 263 | 0436-03 Supernova 1999em in NGC 1637 | Archived | AAVSO | 1999-10-29 (UTC) | 1999-12-01 (UTC) | Spectroscopy, Photometry |
| 262 | 1415-68 Nova Circini 1999 | Archived | AAVSO | 1999-08-23 (UTC) | 1999-08-25 (UTC) | Spectroscopy, Photometry |
| 260 | 0014-06 Supernova 1999cw in MCG -01-02-001 (PGC 1288) | Archived | AAVSO | 1999-06-28 (UTC) | 1999-06-30 (UTC) | Photometry |
| 259 | Alert Notice 259: 1040-51 Nova Velorum 1999 [V382 Vel] | Archived | AAVSO | 1999-05-22 (UTC) | 1999-05-25 (UTC) | Spectroscopy, Photometry |
