About Me


My name is Jenna Crowell and I am a Ph.D. candidate in Physics at the University of Central Florida where I work for Dr. Yan Fernandez studying the surface properties of asteroids.

My area of research is the investigation of the compositional surface variation of near Earth asteroids (NEAs), specifically that of the S-complex asteroids.  Currently, I am studying 1627 Ivar which had a close approach to Earth in 2013.  Our research group was able to obtain CCD lightcurves, delay-Doppler images, Doppler spectra and near-IR spectra.  Using these data, we enhanced the current shape model of Ivar and are currently working on the thermophysical model.  Our data cover a wide range of viewing geometries and phase angles, which allows us to link these data with specific locations on the asteroid and look for possible surface heterogeneities.


Research collaborators include:

Dr. Yan Fernandez (Advisor) - University of Central Florida, Orlando, FLNEAlogo

Dr. Ellen Howell - LPL/University of Arizona, Tucson, AZ

Dr. Christopher Magri - University of Maine at Farmington, Farmington, ME

Dr. Michael Nolan - LPL/University of Arizona, Tucson, AZ

Dr. Ronald Vervack, Jr. - The Johns Hopkins University Applied Physics Lab, Laurel, MD

Sean Marshall - Cornell University, Ithaca, NY


2013 delay-Doppler images and Doppler spectra were collected using the Arecibo Observatory's planetary radar system.  2013 CCD lightcurves were taken by Brian D. Warner using the Palmer Divide Station's 0.35 m telescope.  Lastly, our near-IR spectra were taken using the NASA IRTF's SpeX instrument.


1627 Ivar Shape Model

In this video, we show how the shape model for NEA 1627 Ivar has evolved over the course of this research.  This shows the asteroid transforming from the model presented by Kaasalainen et al. [1], created using lightcurve data, to the current shape model by using recent lightcurve and radar data taken in 2013.

[1] Kaasalainen, M. et al. 2004, Icarus 167, 178-196.


Special Thanks To:

Thanks To


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