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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.
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Separate multiple observers with commas.
Campaign overrides targets and dates.

Found 484117 records

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# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 T CrB WGR 2460865.8926 2025-07-09 09:25 11.2095 0.0358 Sloan u CCD
2 T CrB WGR 2460865.8885 2025-07-09 09:19 11.3231 0.0317 Sloan u CCD
3 T CrB WGR 2460865.8864 2025-07-09 09:16 11.2281 0.0326 Sloan u CCD
4 T CrB WGR 2460865.8795 2025-07-09 09:06 11.1764 0.0024 Johnson B CCD
5 T CrB WGR 2460865.8750 2025-07-09 08:59 11.1934 0.0337 Sloan u CCD
6 T CrB BALQ 2460865.8729 2025-07-09 08:57 10.2 N/A Visual Visual
7 T CrB WGR 2460865.8688 2025-07-09 08:51 11.3190 0.0232 Sloan u CCD
8 T CrB WGR 2460865.8639 2025-07-09 08:43 11.2086 0.0019 Johnson B CCD
9 T CrB WGR 2460865.8614 2025-07-09 08:40 11.3057 0.0254 Sloan u CCD
10 T CrB WGR 2460865.8573 2025-07-09 08:34 11.2260 0.0238 Sloan u CCD
11 T CrB WGR 2460865.8532 2025-07-09 08:28 11.2043 0.0224 Sloan u CCD
12 T CrB SDN 2460865.7571 2025-07-09 06:10 11.209 0.006 Johnson B CCD
13 T CrB SDN 2460865.7568 2025-07-09 06:09 11.194 0.006 Johnson B CCD
14 T CrB SDN 2460865.7564 2025-07-09 06:09 11.199 0.006 Johnson B CCD
15 T CrB SDN 2460865.7560 2025-07-09 06:08 11.202 0.006 Johnson B CCD
16 T CrB SDN 2460865.7557 2025-07-09 06:08 11.173 0.006 Johnson B CCD
17 T CrB SDN 2460865.7553 2025-07-09 06:07 11.201 0.006 Johnson B CCD
18 T CrB SDN 2460865.7549 2025-07-09 06:07 11.227 0.006 Johnson B CCD
19 T CrB SDN 2460865.7545 2025-07-09 06:06 11.207 0.006 Johnson B CCD
20 T CrB SDN 2460865.7541 2025-07-09 06:05 11.216 0.006 Johnson B CCD
21 T CrB SDN 2460865.7538 2025-07-09 06:05 11.213 0.006 Johnson B CCD
22 T CrB SDN 2460865.7534 2025-07-09 06:04 11.203 0.006 Johnson B CCD
23 T CrB SDN 2460865.7530 2025-07-09 06:04 11.236 0.006 Johnson B CCD
24 T CrB SDN 2460865.7526 2025-07-09 06:03 11.237 0.006 Johnson B CCD
25 T CrB SDN 2460865.7522 2025-07-09 06:03 11.238 0.006 Johnson B CCD