14 New Light Curves and an Updated Ephemeris for the Hot Jupiter HAT-P-54 b
Volume 52 number 2 (2024)
- Heather B. Hewitt
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004; hbhewittt@asu.edu
- Bradley Hutson
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Michael Brockman
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Elizabeth Catogni
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Rosemary Ferreira
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Gary Fussell
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Atea Johnson
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Chris Kight
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Ryan A. Kilinski
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Khatu Nguyen
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Ty Perry
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Elizabeth Quinlan
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Eva Randazzo
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Kellan Reagan
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Kinley Subers
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Federico R. Noguer
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Molly N. Simon
- School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287-6004
- Robert T. Zellem
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, and NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics Laboratory (Code 667), Greenbelt, MD 20771
Abstract
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.