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The AAVSO International Database is a repository of variable star observations contributed by amateur and professional astronomers worldwide. Use the form below to search for observations of specific stars or by specific observers.
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| # | Target | Observer | Julian Date | UTC Date | Magnitude | Uncertainty | Band | Type |
|---|---|---|---|---|---|---|---|---|
| 1 | CH Cyg | FRF | 2447000.4000 | 1987-07-23 21:35 | 7.9 | N/A | Visual | Visual |
| 2 | CH Cyg | KVI | 2447000.4000 | 1987-07-23 21:35 | 7.8 | N/A | Visual | Visual |
| 3 | CH Cyg | MZS | 2447000.4000 | 1987-07-23 21:35 | 7.8 | N/A | Visual | Visual |
| 4 | CH Cyg | DPA | 2447000.4190 | 1987-07-23 22:03 | 7.8 | N/A | Visual | Visual |
| 5 | CH Cyg | HMG | 2447000.5000 | 1987-07-24 00:00 | 7.5 | N/A | Visual | Visual |
| 6 | CH Cyg | WEI | 2447000.6200 | 1987-07-24 02:52 | 8.0 | N/A | Visual | Visual |
| 7 | CH Cyg | WEF | 2447000.6340 | 1987-07-24 03:12 | 7.3 | N/A | Visual | Visual |
| 8 | CH Cyg | FAA | 2447001.3700 | 1987-07-24 20:52 | 7.1 | N/A | Visual | Visual |
| 9 | CH Cyg | PPS | 2447001.4000 | 1987-07-24 21:35 | 7.9 | N/A | Visual | Visual |
| 10 | CH Cyg | WEI | 2447001.6100 | 1987-07-25 02:38 | 8.0 | N/A | Visual | Visual |
| 11 | CH Cyg | UND | 2447001.8000 | 1987-07-25 07:11 | 7.0 | N/A | Visual | Visual |
| 12 | CH Cyg | KIS | 2447002.4000 | 1987-07-25 21:35 | 7.2 | N/A | Visual | Visual |
| 13 | CH Cyg | MMI | 2447002.4000 | 1987-07-25 21:35 | 7.4 | N/A | Visual | Visual |
| 14 | CH Cyg | PPS | 2447002.4000 | 1987-07-25 21:35 | 7.7 | N/A | Visual | Visual |
| 15 | CH Cyg | ZAG | 2447002.4000 | 1987-07-25 21:35 | 7.6 | N/A | Visual | Visual |
| 16 | CH Cyg | LLH | 2447002.5000 | 1987-07-26 00:00 | 7.5 | N/A | Visual | Visual |
| 17 | CH Cyg | MED | 2447002.5000 | 1987-07-26 00:00 | 7.8 | N/A | Visual | Visual |
| 18 | CH Cyg | VWS | 2447002.5710 | 1987-07-26 01:42 | 7.8 | N/A | Visual | Visual |
| 19 | CH Cyg | TDM | 2447002.6000 | 1987-07-26 02:24 | 7.6 | N/A | Visual | Visual |
| 20 | CH Cyg | WEI | 2447002.6100 | 1987-07-26 02:38 | 8.1 | N/A | Visual | Visual |
| 21 | CH Cyg | SUS | 2447003.5000 | 1987-07-27 00:00 | 7.8 | N/A | Visual | Visual |
| 22 | CH Cyg | OV | 2447003.6000 | 1987-07-27 02:24 | 7.8 | N/A | Visual | Visual |
| 23 | CH Cyg | PN | 2447003.6000 | 1987-07-27 02:24 | 7.8 | N/A | Visual | Visual |
| 24 | CH Cyg | HE | 2447003.6140 | 1987-07-27 02:44 | 7.6 | N/A | Visual | Visual |
| 25 | CH Cyg | HLS | 2447004.4000 | 1987-07-27 21:35 | 7.8 | N/A | Visual | Visual |