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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 9318 records

# Target Observer Julian Date UTC Date Magnitude Uncertainty Band Type
1 GK Per RFDA 2459506.6097 2021-10-19 02:37 11.490 0.011 Cousins I CCD
2 GK Per RFDA 2459506.6089 2021-10-19 02:36 12.186 0.003 Cousins R CCD
3 GK Per RFDA 2459506.6081 2021-10-19 02:35 13.797 0.018 Johnson B CCD
4 GK Per RFDA 2459506.6071 2021-10-19 02:34 12.903 0.005 Johnson V CCD
5 GK Per CKB 2459505.9243 2021-10-18 10:11 12.9 N/A Visual Visual
6 GK Per KMA 2459505.6264 2021-10-18 03:02 12.7 N/A Visual Visual
7 GK Per CIVA 2459505.4627 2021-10-17 23:06 11.331 0.148 Cousins I CCD
8 GK Per CIVA 2459505.4606 2021-10-17 23:03 12.998 0.124 Johnson V CCD
9 GK Per MUY 2459505.3785 2021-10-17 21:05 12.9 N/A Visual Visual
10 GK Per WPB 2459505.3470 2021-10-17 20:19 13.0 N/A Visual Visual
11 GK Per DUBF 2459505.3120 2021-10-17 19:29 12.764 0.018 Johnson V CCD
12 GK Per DUBF 2459505.3106 2021-10-17 19:27 12.759 0.017 Johnson V CCD
13 GK Per NDQ 2459505.2965 2021-10-17 19:06 <12.6 N/A Visual Visual
14 GK Per MED 2459505.2743 2021-10-17 18:35 <11.5 N/A Visual Visual
15 GK Per TRE 2459504.9507 2021-10-17 10:48 12.778 0.005 Johnson V CCD
16 GK Per TRE 2459504.9475 2021-10-17 10:44 12.793 0.005 Johnson V CCD
17 GK Per TRE 2459504.9420 2021-10-17 10:36 12.819 0.005 Johnson V CCD
18 GK Per TRE 2459504.9365 2021-10-17 10:28 12.834 0.005 Johnson V CCD
19 GK Per TRE 2459504.9333 2021-10-17 10:23 12.843 0.005 Johnson V CCD
20 GK Per CIVA 2459504.5347 2021-10-17 00:50 12.862 0.022 Johnson V CCD
21 GK Per CIVA 2459504.5284 2021-10-17 00:40 12.861 0.020 Johnson V CCD
22 GK Per CIVA 2459504.5219 2021-10-17 00:31 12.947 0.019 Johnson V CCD
23 GK Per CIVA 2459504.5153 2021-10-17 00:22 12.929 0.018 Johnson V CCD
24 GK Per CIVA 2459504.5088 2021-10-17 00:12 12.909 0.017 Johnson V CCD
25 GK Per CIVA 2459504.5033 2021-10-17 00:04 14.090 0.276 Johnson B CCD