PTYS/LPL Faculty

Ellen Howell

Senior Research Scientist
Small Bodies
Ph.D., 1995, University of Arizona

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Drake 115 ∙ Kuiper 218

Years with LPL: 2015 to present

 

Dr. Howell's research interests are small solar system bodies, asteroids and comets. She uses a variety of observational tools at wavelengths ranging from visible to radio to study the composition, size, shape, and surface structures of these bodies.

Current Grants

  • Combining thermal and radar observations of near-Earth asteroids
  • Water and OH on Primitive Bodies: Expanding the Frontier
  • Volatiles, Regolith and Thermal Investigations Consortium for Exploration and Science (VORTICES)
  • In the Eye of the Storm: Inner coma remote sensing of three Jupiter Family Comets

Current Spacecraft Involvement

  • OSIRIS-REx Science Team Member - Visible and Infrared Spectroscopy

 

Current PTYS Graduate Students

Student Collaborations/Advising

Graduate Students (not at UA)

  • Mary Hinkle (University of Central Florida)

Undergraduates

  • Collin Lewin (University of Arizona, Space Grant)

Former Students

  • Jenna Crowell (University of Central Florida)
  • Sean Marshall (Cornell University)

Current Postdocs

Former Postdocs

  • Jenna Jones

Complete publications list available from: NASA ADS Author search: Ellen Howell

Refereed publications (NASA ADS): Calendar Years 2017 through June 2019

Virkki, A., Zubko, E., Nolan, M. C., Howell, E. S., Benner, L. A. M., Harmon, J. K. Decimeter-scale particle characterization in the coma of 73P/Schwassmann-Wachmann 3 using dual-wavelength radar observations 2019Icar..325...94V

Rivkin, A. S., Howell, E. S., Emery, J. P. Infrared Spectroscopy of Large, Low-Albedo Asteroids: Are Ceres and Themis Archetypes or Outliers? 2019JGRE..124.1393R

Lauretta, D. S., Dellagiustina, D. N., Bennett, C. A., Golish, D. R., Becker, K. J., Balram-Knutson, S. S., Barnouin, O. S., Becker, T. L., Bottke, W. F., Boynton, W. V., Campins, H., Clark, B. E., Connolly, H. C., Drouet D'Aubigny, C. Y., Dworkin, J. P., Emery, J. P., Enos, H. L., Hamilton, V. E., Hergenrother, C. W., Howell, E. S., Izawa, M. R. M., Kaplan, H. H., Nolan, M. C., Rizk, B., Roper, H. L., Scheeres, D. J., Smith, P. H., Walsh, K. J., Wolner, C. W. V., Osiris-Rex Team The unexpected surface of asteroid (101955) Bennu 2019Natur.568...55L

Hergenrother, C. W., Maleszewski, C. K., Nolan, M. C., Li, J.-Y., Drouet D'Aubigny, C. Y., Shelly, F. C., Howell, E. S., Kareta, T. R., Izawa, M. R. M., Barucci, M. A., Bierhaus, E. B., Campins, H., Chesley, S. R., Clark, B. E., Christensen, E. J., Dellagiustina, D. N., Fornasier, S., Golish, D. R., Hartzell, C. M., Rizk, B., Scheeres, D. J., Smith, P. H., Zou, X.-D., Lauretta, D. S., OSIRIS-REx Team The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations 2019NatCo..10.1291H

Dellagiustina, D. N., Emery, J. P., Golish, D. R., Rozitis, B., Bennett, C. A., Burke, K. N., Ballouz, R.-L., Becker, K. J., Christensen, P. R., Drouet D'Aubigny, C. Y., Hamilton, V. E., Reuter, D. C., Rizk, B., Simon, A. A., Asphaug, E., Bandfield, J. L., Barnouin, O. S., Barucci, M. A., Bierhaus, E. B., Binzel, R. P., Bottke, W. F., Bowles, N. E., Campins, H., Clark, B. C., Clark, B. E., Connolly, H. C., Daly, M. G., Leon, J. D., Delbo', M., Deshapriya, J. D. P., Elder, C. M., Fornasier, S., Hergenrother, C. W., Howell, E. S., Jawin, E. R., Kaplan, H. H., Kareta, T. R., Le Corre, L., Li, J.-Y., Licandro, J., Lim, L. F., Michel, P., Molaro, J., Nolan, M. C., Pajola, M., Popescu, M., Garcia, J. L. R., Ryan, A., Schwartz, S. R., Shultz, N., Siegler, M. A., Smith, P. H., Tatsumi, E., Thomas, C. A., Walsh, K. J., Wolner, C. W. V., Zou, X.-D., Lauretta, D. S., Osiris-Rex Team Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis 2019NatAs...3..341D

Hamilton, V. E., Simon, A. A., Christensen, P. R., Reuter, D. C., Clark, B. E., Barucci, M. A., Bowles, N. E., Boynton, W. V., Brucato, J. R., Cloutis, E. A., Connolly, H. C., Donaldson Hanna, K. L., Emery, J. P., Enos, H. L., Fornasier, S., Haberle, C. W., Hanna, R. D., Howell, E. S., Kaplan, H. H., Keller, L. P., Lantz, C., Li, J.-Y., Lim, L. F., McCoy, T. J., Merlin, F., Nolan, M. C., Praet, A., Rozitis, B., Sandford, S. A., Schrader, D. L., Thomas, C. A., Zou, X.-D., Lauretta, D. S., Osiris-Rex Team Evidence for widespread hydrated minerals on asteroid (101955) Bennu 2019NatAs...3..332H

Nolan, M. C., Howell, E. S., Scheeres, D. J., McMahon, J. W., Golubov, O., Hergenrother, C. W., Emery, J. P., Noll, K. S., Chesley, S. R., Lauretta, D. S. Detection of Rotational Acceleration of Bennu Using HST Light Curve Observations 2019GeoRL..46.1956N

Shepard, M. K., Timerson, B., Scheeres, D. J., Benner, L. A. M., Giorgini, J. D., Howell, E. S., Magri, C., Nolan, M. C., Springmann, A., Taylor, P. A., Virkki, A. A revised shape model of asteroid (216) Kleopatra 2018Icar..311..197S

Rivkin, A. S., Howell, E. S., Emery, J. P., Sunshine, J. Evidence for OH or H2O on the surface of 433 Eros and 1036 Ganymed 2018Icar..304...74R

Howell, E. S., Magri, C., Vervack, R. J., Nolan, M. C., Taylor, P. A., Fernández, Y. R., Hicks, M. D., Somers, J. M., Lawrence, K. J., Rivkin, A. S., Marshall, S. E., Crowell, J. L. SHERMAN - A shape-based thermophysical model II. Application to 8567 (1996 HW1) 2018Icar..303..220H

Magri, C., Howell, E. S., Vervack, R. J., Nolan, M. C., Fernández, Y. R., Marshall, S. E., Crowell, J. L. SHERMAN, a shape-based thermophysical model. I. Model description and validation 2018Icar..303..203M

Brozović, M., Benner, L. A. M., McMichael, J. G., Giorgini, J. D., Pravec, P., Scheirich, P., Magri, C., Busch, M. W., Jao, J. S., Lee, C. G., Snedeker, L. G., Silva, M. A., Slade, M. A., Semenov, B., Nolan, M. C., Taylor, P. A., Howell, E. S., Lawrence, K. J. Goldstone and Arecibo radar observations of (99942) Apophis in 2012-2013 2018Icar..300..115B

Lawrence, K. J., Benner, L. A. M., Brozovic, M., Ostro, S. J., Jao, J. S., Giorgini, J. D., Slade, M. A., Jurgens, R. F., Nolan, M. C., Howell, E. S., Taylor, P. A. Arecibo and Goldstone radar images of near-Earth Asteroid (469896) 2005 WC1 2018Icar..300...12L

Marshall, S. E., Howell, E. S., Magri, C., Vervack, R. J., Campbell, D. B., Fernández, Y. R., Nolan, M. C., Crowell, J. L., Hicks, M. D., Lawrence, K. J., Taylor, P. A.  Thermal properties and an improved shape model for near-Earth asteroid (162421) 2000 ET70 2017Icar..292...22M

Crowell, J. L., Howell, E. S., Magri, C., Nolan, M. C., Fernández, Y. R., Richardson, J. E., Warner, B. D., Marshall, S. E., Springmann, A., Vervack, R. J.  Radar and Lightcurve Shape Model of Near-Earth Asteroid (1627) Ivar 2017Icar..291..254C

Brozović, M., Benner, L. A. M., Magri, C., Scheeres, D. J., Busch, M. W., Giorgini, J. D., Nolan, M. C., Jao, J. S., Lee, C. G., Snedeker, L. G., Silva, M. A., Lawrence, K. J., Slade, M. A., Hicks, M. D., Howell, E. S., Taylor, P. A., Sanchez, J. A., Reddy, V., Dykhuis, M., Corre, L. L.  Goldstone radar evidence for short-axis mode non-principal-axis rotation of near-Earth asteroid (214869) 2007 PA8 2017Icar..286..314B

Moskovitz, N. A., Polishook, D., DeMeo, F. E., Binzel, R. P., Endicott, T., Yang, B., Howell, E. S., Vervack,, Ronald J., Fernández, Y. R.  Near-infrared thermal emission from near-Earth asteroids: Aspect-dependent variability 2017Icar..284...97M

Shepard, M. K., Richardson, J., Taylor, P. A., Rodriguez-Ford, L. A., Conrad, A., de Pater, I., Adamkovics, M., de Kleer, K., Males, J. R., Morzinski, K. M., Close, L. M., Kaasalainen, M., Viikinkoski, M., Timerson, B., Reddy, V., Magri, C., Nolan, M. C., Howell, E. S., Benner, L. A. M., Giorgini, J. D., Warner, B. D., Harris, A. W.  Radar observations and shape model of asteroid 16 Psyche 2017Icar..281..388S

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Last updated on July 19, 2019