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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.

Enter list of star names, comma separated.
Enter a date in natural language, jd, or utc format.
Enter a date in natural language, jd, or utc format.
Separate multiple observers with commas.
Campaign overrides targets and dates.

Found 7015 records

# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 CH Cyg BXT 2456047.4431 2012-04-29 22:38 7.9 N/A Visual Visual
2 CH Cyg BLQ 2456047.4130 2012-04-29 21:54 7.7 N/A Visual Visual
3 CH Cyg JM 2456046.9548 2012-04-29 10:54 5.678 .02 Cousins R CCD
4 CH Cyg JM 2456046.9546 2012-04-29 10:54 7.518 .02 Johnson V CCD
5 CH Cyg JM 2456046.9544 2012-04-29 10:54 8.957 .02 Johnson B CCD
6 CH Cyg PSD 2456046.9521 2012-04-29 10:51 7.457 0.002 Johnson V CCD
7 CH Cyg JM 2456046.9394 2012-04-29 10:32 5.767 .02 Cousins R CCD
8 CH Cyg JM 2456046.9392 2012-04-29 10:32 7.510 .02 Johnson V CCD
9 CH Cyg JM 2456046.9390 2012-04-29 10:32 8.970 .02 Johnson B CCD
10 CH Cyg JM 2456046.9241 2012-04-29 10:10 5.716 .02 Cousins R CCD
11 CH Cyg JM 2456046.9239 2012-04-29 10:10 7.461 .02 Johnson V CCD
12 CH Cyg JM 2456046.9237 2012-04-29 10:10 8.977 .02 Johnson B CCD
13 CH Cyg HMB 2456046.9173 2012-04-29 10:00 7.285 0.021 Johnson V CCD
14 CH Cyg HMB 2456046.9170 2012-04-29 10:00 7.214 0.021 Johnson V CCD
15 CH Cyg HMB 2456046.9168 2012-04-29 10:00 7.217 0.021 Johnson V CCD
16 CH Cyg HMB 2456046.9166 2012-04-29 09:59 7.265 0.021 Johnson V CCD
17 CH Cyg HMB 2456046.9164 2012-04-29 09:59 7.239 0.021 Johnson V CCD
18 CH Cyg HMB 2456046.9161 2012-04-29 09:59 7.233 0.021 Johnson V CCD
19 CH Cyg HMB 2456046.9159 2012-04-29 09:58 7.250 0.021 Johnson V CCD
20 CH Cyg HMB 2456046.9157 2012-04-29 09:58 7.225 0.021 Johnson V CCD
21 CH Cyg HMB 2456046.9155 2012-04-29 09:58 7.143 0.021 Johnson V CCD
22 CH Cyg HMB 2456046.9153 2012-04-29 09:57 7.219 0.021 Johnson V CCD
23 CH Cyg HMB 2456046.9150 2012-04-29 09:57 7.236 0.021 Johnson V CCD
24 CH Cyg HMB 2456046.9148 2012-04-29 09:57 7.232 0.021 Johnson V CCD
25 CH Cyg HMB 2456046.9146 2012-04-29 09:57 7.277 0.021 Johnson V CCD