PTYS/LPL Faculty

Drake 115 ∙ Kuiper 218

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Ellen Howell

Research Professor

Ph.D., 1995, University of Arizona

Years with LPL: 2015 to present

Small Bodies

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 Graduate Students

  • 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)

Former Postdocs

  • Jenna Jones

Based on Google Scholar and NASA ADS: NASA ADS Author search: Ellen S. Howell

Refereed publications: Calendar Years 2017 through June 2020

Masatoshi Hirabayashi, Ryota Nakano, Eri Tatsumi, Kevin J. Walsh, Olivier S. Barnouin, Patrick Michel, Christine M. Hartzell, Daniel T. Britt, Seiji Sugita, Sei-ichiro Watanabe, William F. Bottke, Daniel J. Scheeres, Ronald-Louis Ballouz, Yuichiro Cho, Tomokatsu Morota, Ellen S. Howell, Dante S. Lauretta, Spin-driven evolution of asteroids' top-shapes at fast and slow spins seen from (101955) Bennu and (162173) Ryugu, Icarus, Volume 352, 2020, 113946, ISSN 0019-1035, doi.org/10.1016/j.icarus.2020.113946

Barucci, M. A., Hasselmann, P. H., Praet, A., Fulchignoni, M., Deshapriya, J. D. P., Fornasier, S., Merlin, F., Clark, B. E., Simon, A. A., Hamilton, V. E., Emery, J. P., Howell, E. S., Brucato, J. R., Cloutis, E. A., Zou, X. D., Li, J.-Y., Michel, P., Ferrone, S., Poggiali, G., Reuter, D. C., DellaGiustina, D. N., Lauretta, D. S. OSIRIS-REx spectral analysis of (101955) Bennu by multivariate statistics 2020A&A...637L...4B

Takir, D., Kareta, T., Emery, J. P., Hanuš, J., Reddy, V., Howell, E. S., Rivkin, A. S., Arai, T. Near-infrared observations of active asteroid (3200) Phaethon reveal no evidence for hydration 2020NatCo..11.2050T

Kaplan, H. H., Hamilton, V. E., Howell, E. S., Scott Anderson, F., Barrucci, M. A., Brucato, J., Burbine, T. H., Clark, B. E., Cloutis, E. A., Connolly, H. C., Dotto, E., Emery, J. P., Fornasier, S., Lantz, C., Lim, L. F., Merlin, F., Praet, A., Reuter, D. C., Sandford, S. A., Simon, A. A., Takir, D., Lauretta, D. S. Visible-near infrared spectral indices for mapping mineralogy and chemistry with OSIRIS-REx 2020M&PS...55..744K

Busch, M. W., Ostro, S. J., Benner, L. A. M., Brozovic, M., Giorgini, J. D., Jao, J., Scheeres, D. J., Magri, C., Nolan, M. C., Howell, E. S., Taylor, P. A., Margot, J.-L., Brisken, W. Corrigendum to "Radar observations and the shape of near-Earth asteroid 2008 EV5" [ICARUS 212 (2011) 649-660] 2019Icar..333..548B

Rożek, A., Lowry, S. C., Nolan, M. C., Taylor, P. A., Benner, L. A. M., Fitzsimmons, A., Zegmott, T. J., Weissman, P. R., Green, S. F., Rozitis, B., Snodgrass, C., Smythe, W. D., Hicks, M. D., Howell, E. S., Virkki, A. K., Aponte-Hernandez, B., Rivera-Valentín, E. G., Rodriguez-Ford, L. A., Zambrano-Marin, L. F., Brozović, M., Naidu, S. P., Giorgini, J. D., Snedeker, L. G., Jao, J. S., Ghigo, F. D. Shape model and spin-state analysis of PHA contact binary (85990) 1999 JV6 from combined radar and optical observations 2019A&A...631A.149R

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, ., 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

Lauretta, D. S., Balram-Knutson, S. S., Beshore, E., Boynton, W. V., Drouet d'Aubigny, C., DellaGiustina, D. N., Enos, H. L., Golish, D. R., Hergenrother, C. W., Howell, E. S., Bennett, C. A., Morton, E. T., Nolan, M. C., Rizk, B., Roper, H. L., Bartels, A. E., Bos, B. J., Dworkin, J. P., Highsmith, D. E., Lorenz, D. A., Lim, L. F., Mink, R., Moreau, M. C., Nuth, J. A., Reuter, D. C., Simon, A. A., Bierhaus, E. B., Bryan, B. H., Ballouz, R., Barnouin, O. S., Binzel, R. P., Bottke, W. F., Hamilton, V. E., Walsh, K. J., Chesley, S. R., Christensen, P. R., Clark, B. E., Connolly, H. C., Crombie, M. K., Daly, M. G., Emery, J. P., McCoy, T. J., McMahon, J. W., Scheeres, D. J., Messenger, S., Nakamura-Messenger, K., Righter, K., Sandford, S. A. OSIRIS-REx: Sample Return from Asteroid (101955) Bennu 2017SSRv..212..925L

Magri, C., Howell, E. S., Nolan, M. C., Taylor, P. A., Fernandez, Y. R., Mueller, M., Vervack, R. J., Benner, L. A. M., Giorgini, J. D., Ostro, S. J., Scheeres, D. J., Hicks, M. D., Rhoades, H., Somers, J. M., Gaftonyuk, N. M., Kouprianov, V. V., Krugly, Y. N., Molotov, I. E., Busch, M. W., Margot, J. L., Benishek, V., Protitch-Benishek, V., Galad, A., Higgins, D., Kusnirak, P., Pray, D. P. Shape and Rotation of (8567) 1996 HW1 V1.0 2017PDSS..275.....M

Becker, T. M., Howell, E. S., Nolan, M. C., Magri, C., Pravec, P., Taylor, P. A., Oey, J., Higgins, D., Vilagi, J., Kornos, L., Galad, A., Gajdos, S., Gaftonyuk, N. M., Krugly, Y. N., Molotov, I. E., Hicks, M. D., Carbognani, A., Warner, B. D., Vachier, F., Marchis, F., Pollock, J. T. Shape model of Asteroid (153591) 2001 SN263 V1.0 2017PDSS..274.....B

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., Le Corre, 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, R. 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 November 24, 2020