[en] We present the results of a fourth planetary defense exercise, focused this time on the small near-Earth asteroid (NEA) 2023 DZ2 and conducted during its close approach to the Earth in 2023 March. The International Asteroid Warning Network (IAWN), with support from NASA's Planetary Defense Coordination Office (PDCO), has been coordinating planetary defense observational campaigns since 2017 to test the operational readiness of the global planetary defense capabilities. The last campaign focused on the NEA Apophis, and an outcome of that exercise was the need for a short burst campaign to replicate a real-life near-Earth object impact hazard scenario. The goal of the 2023 DZ2 campaign was to characterize the small NEA as a potential impactor and exercise the planetary defense system including observations, hypothetical risk assessment and risk prediction, and hazard communication with a short notice of just 24 hr. The entire campaign lasted about 10 days. The campaign team was divided into several working groups based on the characterization method: photometry, spectroscopy, thermal IR photometry and optical polarimetry, radar, and risk assessment. Science results from the campaign show that 2023 DZ2 has a rotation period of 6.2745 ± 0.0030 minutes; visible wavelength color photometry/spectroscopy/polarimetry and near-IR spectroscopy all point to an E-type taxonomic classification with surface composition analogous to aubrite meteorites; and radar observations show that the object has a diameter of 30 ± 10 m, consistent with the high albedo (0.49) derived from polarimetric and thermal IR observations.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Reddy, Vishnu; University of Arizona, Department of Planetary Sciences
Kelley, Michael S.; NASA HQ
Benner, Lance; Jet Propulsion Laboratory
Dotson, Jessie; NASA Ames Research Center
Erasmus, Nicolas; South African Astronomical Observatory
Farnocchia, Davide; Jet Propulsion Laboratory
Linder, Tyler; Astronomical Research Institute, 7168 NCR 2750E, Ashmore, IL 61912, USA
Masiero, Joseph R.; Infrared Processing and Analysis Center
Thomas, Cristina; Northern Arizona University
Bauer, James; University of Maryland, College Park
Alarcon, Miguel R.; Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Bacci, Paolo; Osservatorio Astronomico Montagna Pistoiese, San Marcello Piteglic (PT), Casella Postale 46, Italy, GAMP Gruppo Astrofili Montagna Pistoiese, Italy, UAI—Unione Astrofili Italiani, Padova, Italy
Bamberger, Daniel; Northolt Branch Observatories, Dabbs Hill Lane, Northolt, London, UK
Battle, Adam; University of Arizona, Department of Planetary Sciences
Benkhaldoun, Zouhair; University Cadi Ayyad, Morocco
Birlan, Mirel; Romanian Academy of Sciences, Astronomical Institute, Observatoire de Paris, Institut de Mecanique Celeste et de Calcul des Ephemerides
Brozovic, Marina; Jet Propulsion Laboratory
Burt, Brian; Lowell Observatory, Arizona
Cantillo, David C.; University of Arizona, Department of Planetary Sciences
Chandra, Sunil; South African Astronomical Observatory
Chomette, Gregoire; NASA Ames Research Center
Coates, Ashley; NASA Ames Research Center
DeMeo, Francesca; Massachusetts Institute of Technology
Devogele, Maxime ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > COMets METeors and Asteroids (COMETA) ; Arecibo Observatory
Fatka, Petr; Astronomical Institute AS CR, Fričova 298, Ondřejov, CZ-25165, Czech Republic
Ferrais, Marin ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > COMets METeors and Asteroids (COMETA) ; Massachusetts Institute of Technology
Fini, Paolo; University Cadi Ayyad, Morocco
van Gend, Carel; South African Astronomical Observatory
Giorgini, Jon D.; Jet Propulsion Laboratory
Glamazda, Dmitry; Ural Federal University, Russia
Holmes, Robert; Astronomical Research Institute, 7168 NCR 2750E, Ashmore, IL 61912, USA
Hora, Joseph L.; Center for Astrophysics, Harvard &, Smithsonian, 60 Garden Street, MS-65, Cambridge, MA 02138, USA
Horiuchi, Shinji; Canberra Deep Space Communication Complex, CSIRO, Tidbinbilla, Australia
Jacques, Cristóvão; SONEAR Observatory, Morro do Diamante, Oliveira, Minas Gerais, Brazil, CEAMIG (Centro de Estudos Astronomicos de Minas Gerais) Rua dos Aimores, 2735 Belo Horizonte, Barro Preto Minas Gerais, Brazil
Jehin, Emmanuel ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Jiang, Hai; CAS, National Astronomical Observatories
Kaiser, Galina; Astronomical Institute AS CR, Fričova 298, Ondřejov, CZ-25165, Czech Republic
Kušnirák, Peter; Arecibo Observatory
Kuznetsov, Eduard; Astronomical Institute AS CR, Fričova 298, Ondřejov, CZ-25165, Czech Republic
de León, Julia; University of Maryland, College Park, Astrophysical Institute of the Canaries
Liakos, Alexios; Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS), National Observatory of Athens, Metaxa &, Vas. Pavlou St., GR-15773, Penteli, Athens, Greece
Licandro, Javier; University of Maryland, College Park, Astrophysical Institute of the Canaries
Lister, Tim; Las Cumbres Observatory (LCOGT), 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA
Liu, Jing; University of Liege, Department of Astrophysics, Geophysics and Oceanography
Lopez-Oquendo, Andy; Northern Arizona University
Maestripieri, Martina; University of La Laguna, Department of Astrophysics, -, -
Mathias, Donovan; NASA Ames Research Center
Micheli, Marco; Las Cumbres Observatory (LCOGT), 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA, ESA NEO Coordination Centre, Largo Galileo Galilei, 1, I-00044 Frascati (RM), Italy
Naidu, Shantanu P.; Jet Propulsion Laboratory
Nastasi, Alessandro; GAL Hassin—Centro Internazionale per le Scienze Astronomiche . Via della Fontana Mitri 3, 90010 Isnello, Palermo, Italy, INAF—Osservatorio Astronomico di Palermo, Piazza del Parlamento, 1, 90134 Palermo, Italy
Nedelcu, Alin; SAF—Società Astronomica Fiorentina, 50019 Sesto Fiorentino FI, Italy, Astronomical Institute of the Romanian Academy, 5 Cutitul de Argint, 040557 Bucharest, Romania
Petrescu, Elisabeta ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR) ; CEAMIG (Centro de Estudos Astronomicos de Minas Gerais) Rua dos Aimores, 2735 Belo Horizonte, Barro Preto Minas Gerais, Brazil, Las Cumbres Observatory (LCOGT), 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA, ESA NEO Coordination Centre, Largo Galileo Galilei, 1, I-00044 Frascati (RM), Italy
Popescu, Marcel; Blessed Hermann Observatory, Florence, Italy
Potter, Stephen B.; South African Astronomical Observatory
Pravec, Petr; Arecibo Observatory
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Serra-Ricart, Miquel; University of Maryland, College Park, Astrophysical Institute of the Canaries
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