  NASA Citizen Scientists have used Exoplanet Transit Interpretation Code
(EXOTIC) to reduce 40 sets of time-series images of WASP-12 taken by privately
owned telescopes and a 6-inch telescope operated by the Center for Astrophysics
| Harvard & Smithsonian MicroObservatory (MOBs). Of these sets, 24 result in
clean transit light curves of WASP-12 b which are included in the NASA
Exoplanet Watch website. We use priors from the NASA Exoplanet Archive to
calculate the ephemeris of the planet and combine it with ETD (Exoplanet
Transit Database), ExoClock, and TESS (Transiting Exoplanet Survey Satellite)
observations. Combining these datasets gives an updated ephemeris for the
WASP-12 b system of 2454508.97923 +/- 0.000051 BJDTDB with an orbital period of
1.09141935 +/- 2.16e-08 days which can be used to inform the efficient
scheduling of future space telescope observations. The orbital decay of the
planet was found to be -6.89e-10 +/- 4.01e-11 days/epoch. These results show
the benefits of long-term observations by amateur astronomers that citizen
scientists can analyze to augment the field of Exoplanet research.
