  Here we present an analysis of 14 transit light curves of the hot Jupiter
HAT-P-54 b. Thirteen of our datasets were obtained with the 6-inch
MicroObservatory telescope, Cecilia, and one was measured with the 61-inch
Kuiper Telescope. We used the EXOplanet Transit Interpretation Code (EXOTIC) to
reduce 49 datasets in order to update the planet's ephemeris to a mid-transit
time of 2460216.95257 +/- 0.00022 BJD_TBD and an updated orbital period of
3.79985363 +/- 0.00000037 days. These results improve the mid-transit
uncertainty by 70.27% from the most recent ephemeris update. The updated
mid-transit time can help to ensure the efficient use of expensive, large
ground- and space-based telescope missions in the future. This result
demonstrates that amateur astronomers and citizen scientists can provide
meaningful, cost-efficient, crowd-sourcing observations using ground-based
telescopes to further refine current mid-transit times and orbital periods.
