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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 1107 records

# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 T CrB GZN 2459487.3306 2021-09-29 19:56 9.9 N/A Visual Visual
2 T CrB TOO 2459487.3270 2021-09-29 19:50 9.9 N/A Visual Visual
3 T CrB DFS 2459487.3225 2021-09-29 19:44 11.044 0.010 Johnson B CCD
4 T CrB DFS 2459487.3224 2021-09-29 19:44 10.087 0.007 Johnson V CCD
5 T CrB OJR 2459487.3104 2021-09-29 19:27 9.9 N/A Visual Visual
6 T CrB NDQ 2459487.2938 2021-09-29 19:03 10.0 N/A Visual Visual
7 T CrB HDAE 2459487.2861 2021-09-29 18:51 10.1 N/A Visual Visual
8 T CrB BLQ 2459487.2820 2021-09-29 18:46 10.3 N/A Visual Visual
9 T CrB ZUD 2459486.5483 2021-09-29 01:09 9.9 N/A Visual Visual
10 T CrB DJED 2459486.5302 2021-09-29 00:43 7.556 0.034 Cousins I CCD
11 T CrB DJED 2459486.5298 2021-09-29 00:42 9.106 0.025 Cousins R CCD
12 T CrB DJED 2459486.5293 2021-09-29 00:42 10.048 0.029 Johnson V CCD
13 T CrB DJED 2459486.5277 2021-09-29 00:39 7.572 0.032 Cousins I CCD
14 T CrB DJED 2459486.5273 2021-09-29 00:39 9.117 0.026 Cousins R CCD
15 T CrB DJED 2459486.5268 2021-09-29 00:38 10.034 0.030 Johnson V CCD
16 T CrB DJED 2459486.5260 2021-09-29 00:37 11.021 0.141 Johnson B CCD
17 T CrB DJED 2459486.5251 2021-09-29 00:36 7.572 0.032 Cousins I CCD
18 T CrB DJED 2459486.5247 2021-09-29 00:35 9.105 0.026 Cousins R CCD
19 T CrB DJED 2459486.5242 2021-09-29 00:34 10.034 0.031 Johnson V CCD
20 T CrB DJED 2459486.5234 2021-09-29 00:33 11.007 0.116 Johnson B CCD
21 T CrB DJED 2459486.5226 2021-09-29 00:32 7.558 0.028 Cousins I CCD
22 T CrB DJED 2459486.5222 2021-09-29 00:31 9.094 0.026 Cousins R CCD
23 T CrB DJED 2459486.5217 2021-09-29 00:31 10.024 0.031 Johnson V CCD
24 T CrB DJED 2459486.5209 2021-09-29 00:30 11.018 0.094 Johnson B CCD
25 T CrB DJED 2459486.5202 2021-09-29 00:29 7.589 0.030 Cousins I CCD