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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 344 records

# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 TW Hya OAAA 2459291.4331 2021-03-17 22:23 10.652 0.031 Cousins R CCD
2 TW Hya OAAA 2459291.4331 2021-03-17 22:23 11.189 0.019 Johnson V CCD
3 TW Hya OAAA 2459291.4331 2021-03-17 22:23 11.993 0.026 Johnson B CCD
4 TW Hya MLF 2459291.4200 2021-03-17 22:04 9.39 0.02 Cousins I CCD
5 TW Hya MLF 2459291.4200 2021-03-17 22:04 10.27 0.02 Cousins R CCD
6 TW Hya MLF 2459291.4200 2021-03-17 22:04 11.17 0.02 Johnson V CCD
7 TW Hya MLF 2459291.4200 2021-03-17 22:04 12.17 0.05 Johnson B CCD
8 TW Hya HMB 2459290.6480 2021-03-17 03:33 10.548 0.006 Cousins R CCD
9 TW Hya HMB 2459290.6478 2021-03-17 03:32 10.536 0.006 Cousins R CCD
10 TW Hya HMB 2459290.6475 2021-03-17 03:32 12.661 0.010 Johnson B CCD
11 TW Hya HMB 2459290.6471 2021-03-17 03:31 12.644 0.011 Johnson B CCD
12 TW Hya HMB 2459290.6467 2021-03-17 03:31 11.435 0.006 Johnson V CCD
13 TW Hya HMB 2459290.6464 2021-03-17 03:30 11.450 0.006 Johnson V CCD
14 TW Hya HMB 2459290.6462 2021-03-17 03:30 9.644 0.015 Cousins I CCD
15 TW Hya HMB 2459290.6460 2021-03-17 03:30 9.633 0.015 Cousins I CCD
16 TW Hya HMB 2459289.6509 2021-03-16 03:37 10.109 0.005 Cousins R CCD
17 TW Hya HMB 2459289.6507 2021-03-16 03:36 10.116 0.005 Cousins R CCD
18 TW Hya HMB 2459289.6503 2021-03-16 03:36 11.687 0.007 Johnson B CCD
19 TW Hya HMB 2459289.6499 2021-03-16 03:35 11.674 0.007 Johnson B CCD
20 TW Hya HMB 2459289.6496 2021-03-16 03:35 10.893 0.005 Johnson V CCD
21 TW Hya HMB 2459289.6493 2021-03-16 03:35 10.877 0.005 Johnson V CCD
22 TW Hya HMB 2459289.6491 2021-03-16 03:34 9.426 0.014 Cousins I CCD
23 TW Hya HMB 2459289.6489 2021-03-16 03:34 9.405 0.015 Cousins I CCD
24 TW Hya MGW 2459289.0733 2021-03-15 13:45 9.358 0.005 Cousins I CCD
25 TW Hya MGW 2459289.0727 2021-03-15 13:44 9.992 0.003 Cousins R CCD