PTYS/LPL Faculty

Kuiper 233


Vishnu Reddy

Associate Professor

Asteroid Surveys, Cosmochemistry, Planetary Astronomy, Planetary Surfaces, Small Bodies, Space Situational Awareness, Spectroscopy

Dr. Reddy’s research focuses on understanding the behavior of space objects (natural and artificial) using a range of Earth and space-based assets. His work on natural moving objects (asteroids, near-Earth objects) is directed towards their characterization for impact hazard assessment/mitigation, asteroid-meteorite link and resource utilization. To this effort, Dr. Reddy uses the NASA Infrared Telescope Facility on Mauna Kea, Hawai’i.

The orbital space around the Earth is an invaluable resource that is increasingly becoming congested, contested, and competitive with the ever increasing threat from artificial and our adversaries. Dr. Reddy uses the same techniques used to characterize asteroid to study the behavior of artificial objects to identify their nature, intent and origin. He is setting up a space material characterization lab to observe the reflectance properties of natural (meteorites/minerals) and artificial space material in space like conditions. 

View LPL Evening Lecture from November 15, 2016, NEOCam Mission: Protecting the Earth One Asteroid at a Time

Ph.D., 2009, University of North Dakota

Years with LPL: Spring 2016

Current Grants

  • Spectral Characterization of Small Near-Earth Objects
  • Spectral Characterization of Geo-Stationary Objects
  • Doppler radar tracking and recovery of artificial and natural space debris
  • Characterization of Spacecraft Mission Targets
Period Role $k Source Short Title
2017-2022 PI 736 NASA NEOO Characterization of Small NEOs
2020-2023 PI 524 NASA NEOO Rapid Detection and Recovery of Meteorites
2020-2023 PI 342 NASA SSO Long-term Monitoring of Active Asteroid (6478) Gault
2020 Co-I 200 NASA PDCO Near-Earth Object Surveillance Mission


Current Spacecraft Involvement

  • Near-Earth Object Surveillance Mission (NEOSM)

Former Spacecraft Involvement

  • OSIRIS-REx (Sample Return mission to NEA 101955 Bennu)
  • NASA Dawn Mission to Dwarf Planet Ceres

Current Graduate Students

  • Tanner Campbell (PhD Student: Aerospace and Mechanical Engineering)
  • Peter Genevose (PhD Student: Aerospace and Mechanical Engineering)
  • Mario De Florio (PhD Student: Systems and Industrial Engineering)
  • Bryn Bowen (Undergraduate: Astronomy)
  • David Cantillo (Undergraduate: Geosciences)
  • Grace Halferty (Undergraduate: Aerospace and Mechanical Engineering)
  • Calista Olander (Undergraduate: Math)

Former Students

  • Adriana Mitchell, 2019 (Optical Sciences)
  • Joe Padish, 2019 (Aerospace and Mechanical Engineering)
  • Jamie Rike, 2019 (Biosystems Engineering)
  • Parker Noonan Kaufmann, 2018 (Computer Science)

Current Postdocs

  • Juan Sanchez (PSI)

Former Postdocs

  • Michael Craig (LPL)


Complete publications list available from: NASA ADS Author search: Vishnu Reddy

Refereed Publications (NASA ADS): Calendar Years 2017 through June 2020

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

Sanchez, J. A., Thomas, C., Reddy, V., Frere, N., Lindsay, S. S., Mitchell, A. A New Method for Deriving Composition of S-type Asteroids from Noisy and Incomplete Near-infrared Spectra 2020AJ....159..146S

McGraw, A. M., Reddy, V., Izawa, M. R. M., Sanchez, J. A., Le Corre, L., Cloutis, E. A., Applin, D. M., Pearson, N. Mineralogical Criteria for the Parent Asteroid of the "Carbonaceous" Achondrite NWA 6704 2020AJ....159..107M

Kareta, T., Andrews, J., Noonan, J. W., Harris, W. M., Smith, N., O'Brien, P., Sharkey, B. N. L., Reddy, V., Springmann, A., Lejoly, C., Volk, K., Conrad, A., Veillet, C. Carbon Chain Depletion of 2I/Borisov 2020ApJ...889L..38K

Williamson, B., Sonnett, S., Witry, J., Chatelain, J., Grav, T., Reddy, V., Lejoly, C., Kramer, E., Mainzer, A., Masiero, J., Gritsevich, M., Bauer, J. Rotational Properties of Three Hilda Asteroids 2020MPBu...47...66W

Mitchell, A. M., Reddy, V., Sharkey, B. N. L., Sanchez, J. A., Burbine, T. H., Le Corre, L., Thomas, C. A. Constraining ordinary chondrite composition via near-infrared spectroscopy 2020Icar..33613426M

Kareta, T., Sharkey, B., Noonan, J., Volk, K., Reddy, V., Harris, W., Miles, R. Physical Characterization of the 2017 December Outburst of the Centaur 174P/Echeclus 2019AJ....158..255K

Noonan, J. W., Reddy, V., Harris, W. M., Bottke, W. F., Sanchez, J. A., Furfaro, R., Brown, Z., Fernandes, R., Kareta, T., Lejoly, C., Teja Nallapu, R., Niazi, H. K., Slick, L. R., Schatz, L., Sharkey, B. N. L., Springmann, A., Angle, G., Bailey, L., Acuna, D. D., Lewin, C., Marchese, K., Meshel, M., Quintero, N., Tatum, K., Wilburn, G. Search for the H Chondrite Parent Body among the Three Largest S-type Asteroids: (3) Juno, (7) Iris, and (25) Phocaea 2019AJ....158..213N

Sharkey, B. N. L., Reddy, V., Sanchez, J. A., Izawa, M. R. M., Emery, J. P. Compositional Constraints for Lucy Mission Trojan Asteroids via Near-infrared Spectroscopy 2019AJ....158..204S

Sanchez, J. A., Reddy, V., Thirouin, A., Wright, E. L., Linder, T. R., Kareta, T., Sharkey, B. Physical Characterization of Active Asteroid (6478) Gault 2019ApJ...881L...6S

Witry, J., Sonnett, S., Williamson, B., Chatelain, J., Grav, T., Reddy, V., Lejoly, C., Kramer, E., Mainzer, A., Masiero, J., Gritsevich, M., Bauer, J. Rotation Properties of Large-Amplitude Hilda Asteroids 2019MPBu...46..335W

Williamson, B., Sonnett, S., Witry, J., Chatelain, J., Grav, T., Reddy, V., Lejoly, C., Kramer, E., Mainzer, A., Masiero, J., Gritsevich, M., Bauer, J. Physical Properties of Hilda Binary Asteroid Candidates 2019MPBu...46..332W

Reddy, V., Kelley, M. S., Farnocchia, D., Ryan, W. H., Thomas, C. A., Benner, L. A. M., Dotson, J., Micheli, M., Brucker, M. J., Bus, S. J., Brozovic, M., Wheeler, L., Abbasi, V., Bauer, J. M., Bonsall, A., Brown, Z. L., Busch, M. W., Chodas, P., Choi, Y.-J., Erasmus, N., Fast, K. E., Faucher, J. P., Fernandes, R. B., Ghigo, F. D., Gilbank, D. G., Giorgini, J. D., Gustafsson, A., Hainaut, O., Harris, W. M., Jao, J. S., Johnson, L. S., Kareta, T., Kim, M.-J., Koschny, D., Kramer, E. A., Landis, R. R., Laurin, D. G., Larsen, J. A., Lee, C. G., Lejoly, C., Lister, T., McMillan, R., Masiero, J. R., Mathias, D., Mommert, M., Moon, H.-K., Moskovitz, N. A., Naidu, S. P., Nallapu, R. T., Niazi, H. K., Noonan, J. W., Polishook, D., Ryan, E. V., Schatz, L., Scotti, J. V., Sharkey, B., Shustov, B. M., Sickafoose, A. A., Silva, M. A., Slade, M. A., Slick, L. R., Snedeker, L. G., Springmann, A., Tholen, D., Trilling, D. E., Vodniza, A. Q., Wainscoat, R., Weryk, R., Yoshikawa, M. Near-Earth asteroid 2012 TC4 observing campaign: Results from a global planetary defense exercise 2019Icar..326..133R

Unsalan, O., Jenniskens, P., Yin, Q.-Z., Kaygisiz, E., Albers, J., Clark, D. L., Granvik, M., Demirkol, I., Erdogan, I. Y., Bengu, A. S., Özel, M. E., Terzioglu, Z., Gi, N., Brown, P., Yalcinkaya, E., Temel, T., Prabhu, D. K., Robertson, D. K., Boslough, M., Ostrowski, D. R., Kimberley, J., Er, S., Rowland, D. J., Bryson, K. L., Altunayar-Unsalan, C., Ranguelov, B., Karamanov, A., Tatchev, D., Kocahan, Ö., Oshtrakh, M. I., Maksimova, A. A., Karabanalov, M. S., Verosub, K. L., Levin, E., Uysal, I., Hoffmann, V., Hiroi, T., Reddy, V., Ildiz, G. O., Bolukbasi, O., Zolensky, M. E., Hochleitner, R., Kaliwoda, M., Öngen, S., Fausto, R., Nogueira, B. A., Chukin, A. V., Karashanova, D., Semionkin, V. A., YeșIltaș, M., Glotch, T., Yilmaz, A., Friedrich, J. M., Sanborn, M. E., Huyskens, M., Ziegler, K., Williams, C. D., SchöNbäChler, M., Bauer, K., Meier, M. M. M., Maden, C., Busemann, H., Welten, K. C., Caffee, M. W., Laubenstein, M., Zhou, Q., Li, Q.-L., Li, X.-H., Liu, Y., Tang, G.-Q., Sears, D. W. G., McLain, H. L., Dworkin, J. P., Elsila, J. E., Glavin, D. P., Schmitt-Kopplin, P., Ruf, A., Le Corre, L., Schmedemann, N., Saričiček Meteorite Consortiu The Sariçiçek howardite fall in Turkey: Source crater of HED meteorites on Vesta and impact risk of Vestoids 2019M&PS...54..953U

Binzel, R. P., DeMeo, F. E., Turtelboom, E. V., Bus, S. J., Tokunaga, A., Burbine, T. H., Lantz, C., Polishook, D., Carry, B., Morbidelli, A., Birlan, M., Vernazza, P., Burt, B. J., Moskovitz, N., Slivan, S. M., Thomas, C. A., Rivkin, A. S., Hicks, M. D., Dunn, T., Reddy, V., Sanchez, J. A., Granvik, M., Kohout, T. Compositional distributions and evolutionary processes for the near-Earth object population: Results from the MIT-Hawaii Near-Earth Object Spectroscopic Survey (MITHNEOS) 2019Icar..324...41B

Lucas, M. P., Emery, J. P., MacLennan, E. M., Pinilla-Alonso, N., Cartwright, R. J., Lindsay, S. S., Reddy, V., Sanchez, J. A., Thomas, C. A., Lorenzi, V. Hungaria asteroid region telescopic spectral survey (HARTSS) II: Spectral homogeneity among Hungaria family asteroids 2019Icar..322..227L

Kareta, T., Reddy, V., Hergenrother, C., Lauretta, D. S., Arai, T., Takir, D., Sanchez, J., Hanuš, J. Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon 2018AJ....156..287K

Cloutis, E. A., Reddy, V., Blewett, D. T. The ungrouped achondrite Northwest Africa (NWA) 7325: Spectral reflectance properties and implications for parent body identification 2018Icar..311..384C

Holler, B. J., Milam, S. N., Bauer, J. M., Alcock, C., Bannister, M. T., Bjoraker, G. L., Bodewits, D., Bosh, A. S., Buie, M. W., Farnham, T. L., Haghighipour, N., Hardersen, P. S., Harris, A. W., Hirata, C. M., Hsieh, H. H., Kelley, M. S. P., Knight, M. M., Kramer, E. A., Longobardo, A., Nixon, C. A., Palomba, E., Protopapa, S., Quick, L. C., Ragozzine, D., Reddy, V., Rhodes, J. D., Rivkin, A. S., Sarid, G., Sickafoose, A. A., Simon, A. A., Thomas, C. A., Trilling, D. E., West, R. A. Solar system science with the Wide-Field Infrared Survey Telescope 2018JATIS...4c4003H

Hardersen, P. S., Reddy, V., Cloutis, E., Nowinski, M., Dievendorf, M., Genet, R. M., Becker, S., Roberts, R. Basalt or Not? Near-infrared Spectra, Surface Mineralogical Estimates, and Meteorite Analogs for 33 Vp-type Asteroids 2018AJ....156...11H

McGraw, A. M., Reddy, V., Sanchez, J. A. Do L chondrites come from the Gefion family? 2018MNRAS.476..630M

Cloutis, E. A., Pietrasz, V. B., Kiddell, C., Izawa, M. R. M., Vernazza, P., Burbine, T. H., DeMeo, F., Tait, K. T., Bell, J. F., Mann, P., Applin, D. M., Reddy, V. Spectral reflectance "deconstruction" of the Murchison CM2 carbonaceous chondrite and implications for spectroscopic investigations of dark asteroids 2018Icar..305..203C

Drummond, J. D., Merline, W. J., Carry, B., Conrad, A., Reddy, V., Tamblyn, P., Chapman, C. R., Enke, B. L., Pater, I. de ., Kleer, K. de ., Christou, J., Dumas, C. The triaxial ellipsoid size, density, and rotational pole of asteroid (16) Psyche from Keck and Gemini AO observations 2004-2015 2018Icar..305..174D

Le Corre, L., Sanchez, J. A., Reddy, V., Takir, D., Cloutis, E. A., Thirouin, A., Becker, K. J., Li, J.-Y., Sugita, S., Tatsumi, E. Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations 2018MNRAS.475..614L

Reddy, V., Sanchez, J. A., Furfaro, R., Binzel, R. P., Burbine, T. H., Le Corre, L., Hardersen, P. S., Bottke, W. F., Brozovic, M. Surface Composition of (99942) Apophis 2018AJ....155..140R

Bhatt, M., Reddy, V., Schindler, K., Cloutis, E., Bhardwaj, A., Corre, L. L., Mann, P. Composition of Jupiter irregular satellites sheds light on their origin 2017A&A...608A..67B

Nathues, A., Platz, T., Hoffmann, M., Thangjam, G., Cloutis, E. A., Applin, D. M., Le Corre, L., Reddy, V., Mengel, K., Protopapa, S., Takir, D., Preusker, F., Schmidt, B. E., Russell, C. T. Oxo Crater on (1) Ceres: Geological History and the Role of Water-ice 2017AJ....154...84N

Reddy, V., Sanchez, J. A. Reddy Near-Earth and Mars-crossing Asteroids V1.0 2017PDSS..277.....R

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

Nathues, A., Platz, T., Thangjam, G., Hoffmann, M., Mengel, K., Cloutis, E. A., Le Corre, L., Reddy, V., Kallisch, J., Crown, D. A. Evolution of Occator Crater on (1) Ceres 2017AJ....153..112N

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

Takir, D., Reddy, V., Sanchez, J. A., Shepard, M. K., Emery, J. P. Detection of Water and/or Hydroxyl on Asteroid (16) Psyche 2017AJ....153...31T

Sanchez, J. A., Reddy, V., Shepard, M. K., Thomas, C., Cloutis, E. A., Takir, D., Conrad, A., Kiddell, C., Applin, D. Detection of Rotational Spectral Variation on the M-type Asteroid (16) Psyche 2017AJ....153...29S

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Semester Course Day/Time Location Resources
Fall 2018 PTYS 595B-001 W 1:00-3:00p.m. Kuiper 312 Syllabus
Fall 2017 PTYS 516-001 TTH 2:00 - 3:15 p.m. Kuiper 312 Syllabus
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Fall 2017 PTYS 416-001 TTH 2:00 - 3:15 p.m. Kuiper 312 Syllabus
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Last updated on July 8, 2020