NGC 5273 is a known optical and X-ray variable AGN. We analyze new and
archival IR, optical, UV, and X-ray data in order to characterize its long-term
variability from 2000 to 2022. At least one changing-look event occurred
between 2011 and 2014, when the AGN changed from a Type 1.8/1.9 Seyfert to a
Type 1. It then faded considerably at all wavelengths, followed by a dramatic
but slow increase in UV/optical brightness between 2021 and 2022. We propose
that NGC 5273 underwent multiple changing-look events between 2000 and 2022 --
starting as a Type 1.8/1.9, NGC 5273 changes-look to a Type 1 only temporarily
in 2002 and again in 2014, reverting back to a Type 1.8/1.9 by 2005 and 2017,
respectively. In 2022, it is again a Type 1 Seyfert with optical and NIR broad
emission lines. We characterize the changing-look events and their connection
to the dynamic accretion and radiative processes in NGC 5273.Comment: 18 pages, 13 figures, 4 tables, submitting to MNRA