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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 3175 records

# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 V1491 CYG HMH 2458789.5519 2019-11-02 01:14 13.425 0.165 Cousins I CCD
2 V1491 CYG HMH 2458789.5566 2019-11-02 01:21 15.375 0.041 Johnson V CCD
3 V1491 CYG HMH 2458789.5613 2019-11-02 01:28 16.764 0.132 Johnson B CCD
4 V1491 CYG SDM 2458789.5609 2019-11-02 01:27 15.202 0.016 Johnson V CCD
5 V1491 CYG SDM 2458789.5697 2019-11-02 01:40 13.243 0.122 Cousins I CCD
6 V1491 CYG SDM 2458789.5651 2019-11-02 01:33 16.853 0.075 Johnson B CCD
7 V1491 CYG SDM 2458789.5609 2019-11-02 01:27 15.211 0.031 Johnson V CCD
8 V1491 CYG HMH 2458791.6280 2019-11-04 03:04 13.438 0.159 Cousins I CCD
9 V1491 CYG HMH 2458791.6327 2019-11-04 03:11 15.380 0.051 Johnson V CCD
10 V1491 CYG HMH 2458791.6374 2019-11-04 03:17 17.230 0.148 Johnson B CCD
11 V1491 CYG SFGA 2458791.7116 2019-11-04 05:04 16.601 0.135 Johnson B CCD
12 V1491 CYG SFGA 2458791.7073 2019-11-04 04:58 15.220 0.053 Johnson V CCD
13 V1491 CYG KNAA 2458791.6408 2019-11-04 03:22 13.116 0.025 Cousins I CCD
14 V1491 CYG KNAA 2458791.6333 2019-11-04 03:11 14.100 0.024 Cousins R CCD
15 V1491 CYG KNAA 2458791.6259 2019-11-04 03:01 15.150 0.026 Johnson V CCD
16 V1491 CYG KNAA 2458791.6184 2019-11-04 02:50 16.841 0.049 Johnson B CCD
17 V1491 CYG LPAC 2458789.7103 2019-11-02 05:02 13.376 0.021 Cousins I CCD
18 V1491 CYG LPAC 2458789.7114 2019-11-02 05:04 13.340 0.019 Cousins I CCD
19 V1491 CYG LPAC 2458789.7125 2019-11-02 05:06 13.316 0.020 Cousins I CCD
20 V1491 CYG LPAC 2458789.7136 2019-11-02 05:07 13.371 0.020 Cousins I CCD
21 V1491 CYG LPAC 2458789.7147 2019-11-02 05:09 13.279 0.018 Cousins I CCD
22 V1491 CYG LPAC 2458789.7158 2019-11-02 05:10 13.348 0.020 Cousins I CCD
23 V1491 CYG LPAC 2458789.7169 2019-11-02 05:12 13.310 0.019 Cousins I CCD
24 V1491 CYG LPAC 2458789.7181 2019-11-02 05:14 13.373 0.021 Cousins I CCD
25 V1491 CYG LPAC 2458789.7192 2019-11-02 05:15 13.306 0.019 Cousins I CCD