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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 6156 records

# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 3C 273 HBB 2455573.9348 2011-01-12 10:26 12.686 0.003 Johnson V CCD
2 3C 273 SGOR 2455574.9530 2011-01-13 10:52 12.679 0.010 Johnson V CCD
3 3C 273 SGOR 2455574.9538 2011-01-13 10:53 12.752 0.010 Johnson V CCD
4 3C 273 SGOR 2455574.9547 2011-01-13 10:54 12.746 0.010 Johnson V CCD
5 3C 273 NAO 2455574.9047 2011-01-13 09:42 12.05 N/A Cousins I CCD
6 3C 273 NAO 2455574.8977 2011-01-13 09:32 12.82 N/A Johnson B CCD
7 3C 273 NAO 2455574.9025 2011-01-13 09:39 12.53 N/A Cousins R CCD
8 3C 273 NAO 2455574.9001 2011-01-13 09:36 12.68 N/A Johnson V CCD
9 3C 273 MGW 2455575.9249 2011-01-14 10:11 12.086 0.020 Cousins I CCD
10 3C 273 MGW 2455575.9227 2011-01-14 10:08 12.551 0.011 Cousins R CCD
11 3C 273 MGW 2455575.9204 2011-01-14 10:05 12.753 0.015 Johnson V CCD
12 3C 273 SGOR 2455575.9442 2011-01-14 10:39 12.069 0.014 Cousins I CCD
13 3C 273 SGOR 2455575.9450 2011-01-14 10:40 12.076 0.015 Cousins I CCD
14 3C 273 SGOR 2455575.9458 2011-01-14 10:41 12.060 0.015 Cousins I CCD
15 3C 273 SGOR 2455575.9468 2011-01-14 10:43 12.554 0.007 Cousins R CCD
16 3C 273 SGOR 2455575.9477 2011-01-14 10:44 12.551 0.007 Cousins R CCD
17 3C 273 SGOR 2455575.9485 2011-01-14 10:45 12.555 0.008 Cousins R CCD
18 3C 273 SGOR 2455575.9495 2011-01-14 10:47 12.741 0.010 Johnson V CCD
19 3C 273 SGOR 2455575.9504 2011-01-14 10:48 12.734 0.010 Johnson V CCD
20 3C 273 SGOR 2455576.9424 2011-01-15 10:37 12.061 0.014 Cousins I CCD
21 3C 273 SGOR 2455576.9433 2011-01-15 10:38 12.055 0.014 Cousins I CCD
22 3C 273 SGOR 2455576.9441 2011-01-15 10:39 12.067 0.014 Cousins I CCD
23 3C 273 SGOR 2455576.9451 2011-01-15 10:40 12.546 0.007 Cousins R CCD
24 3C 273 SGOR 2455576.9459 2011-01-15 10:42 12.556 0.007 Cousins R CCD
25 3C 273 SGOR 2455576.9467 2011-01-15 10:43 12.554 0.007 Cousins R CCD