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Observing 27 Euterpe the Asteroid College Park Scholars Academic Showcase May 6, 2016 Shervin Razazi, [email protected], SDU Research Question How can we determine the rotation rate of an asteroid? Intro Why Research This? Astronomers use the data in order to find out more specific properties of asteroids. For example, an asteroid with a rotation period of under 2.2 hours is generally considered too small to be a self sustaining structure, which means that while in the asteroid belt they are too small to be held together by themselves This suggests that these smaller bodies were once parts of larger asteroids. The data from all the thousands of asteroids being observe allow us to learn more and more about the solar system and its origins. My Project group is called Explore the Universe and we are a group of mostly SDU scholars students who conduct research on various observable astronomical phenomena. My specific project was to observe an asteroid and then determine the rotation rate of that asteroid. The asteroid I ended up observing is named 27 Euterpe. Photo C.R. Shervin Razazi Limitations • Weather • Clouds • Humidity • Wind • Position of Asteroid • Past the horizon • Position of nearby stars • Time • Asteroid not observable at some times of the night • Hard to go observe at 3 am How This Affected Me Doing this project was not my first choice. As a Chemical Engineer astronomy is not something I have ever studied or thought I would ever be doing. Even though it is not relevant to my major it did teach me how hard it is to collect accurate scientific data. After spending time on this project I have learned how to observe space phenomena. This project also taught me a lot about responsibility and how to manage my time in order to meet project deadlines while balancing schoolwork at the same time. Methodology Photometry • Analyze with Astro Image J • Calibrate raw images • Align calibrated photos • Generate light curve • Gives a lot of information about asteroid • The time difference between peaks is the estimated rotation period. • Different asteroid generate different shaped light curve due to their different shapes. Analysis First step whenever we have to start an observation is to get the telescope in focus. After that we have to sync the telescope onto a star near our target. The next stop is to generate an ephemeris which lists the coordinates of the asteroid on different days and times. From there we generate star chars which show our asteroid in the night sky with stars around it. This is in order to locate our asteroid in the images. We then set up a sequence in the software Maxim DL This sequence tells our telescope how many pictures to take, at what exposures, and which filters to use. The countless amount of hours that astronomers spend observing small bodies such as asteroids may seem fruitless, considering that in most telescopes the size of the asteroid is a single pixel. Combined with the inherent dependency on weather for getting quality data astronomy is a long and tedious process. But one that is very useful for physicists and scientists worldwide. The data that astronomers get from their observations allows scientists to form predictions about how planets are formed, how the effect of light from a nearby star influences the light another space body emits as well. Photo C.R. Stephens et al Acknowledgements to Elizabeth Warner, Mentor and the Director of the UMD observatory