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Joseph  Masiero's Picture
Jet Propulsion Laboratory
M/S 183-301
4800 Oak Grove Drive
Pasadena, CA 91109
(818) 393-5614
Curriculum Vitae:

Joseph Masiero
Group Supervisor

  • Ph.D., Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI USA, (2009)
  • B.S., Astronomy & Astrophysics, The Pennsylvania State University, State College, PA USA, (2004)

Research Interests
  • Asteroid physical properties
  • Asteroid families
  • Numerical simulations of Solar system evolution
  • Imaging polarimetry
  • Thermal models of Solar system objects
  • Polarimetric instrumentation and characterization
  • Education & public outreach


Wide-field Infrared Survey Explorer (WISE) is a four-channel, super-cooled infrared telescope designed to survey the entire sky with 1,000 times more sensitivity than previous infrared missions.

The NEOWISE project is the asteroid-hunting portion of the Wide-field Infrared Survey Explorer (WISE) mission. NEOWISE harvests measurements of asteroids and comets from the WISE images and provides a rich archive for searching WISE data for solar...

NEOcam Icon NEOcam
The Near-Earth Object Camera (NEOCam) is a new mission proposal designed to discover and characterize most of the potentially hazardous asteroids that are near the Earth.

Professional Experience
  • Deputy PI - NEOWISE: 2017-present
  • JPL Scientist (2012-present)
  • NASA Postdoctoral Fellow, Wide-field Infrared Survey Explorer, JPL (2009-2012)
  • Research Assistant, Institute for Astronomy, UH (2005-2009)
  • Teaching Assistant, Dept of Physics and Astronomy, UH (2004-2005)
  • Research Assistant, Dept of Astronomy & Astrophysics, PSU (2001-2004) (2001)

Selected Awards
  • Asteroid 8255 Masiero (1981 EZ18) named in honor
  • JPL Voyager Award: NEOWISE and NEOCam science, 2018
  • 6 JPL Team Awards, NEOWISE and NEOCam, 2016-2019
  • NASA Early Career Public Achievement Medal 2016
  • 2 NASA Group Achievement Awards: 2012-2016
  • JPL Voyager Award: NEOWISE scientific analysis 2015
  • JPL Science Division Mariner Award: NEOWISE restart 2014
  • Honorary Officer, NASA's First Planetary Defense Squadron (Provisional) 2011
  • NASA Postdoctoral Program Fellowship 2009 - 2012
  • Penn State Eberly College of Science Braddock Scholar 2000 - 2004

Selected Publications
  1. Masiero, J.; Wright, E.L.; Mainzer, A.K., “Thermophysical modeling of NEOWISE observations of DESTINY+ targets Phaethon and 2005 UD”, 2019, AJ, 158, 97.
  2. Masiero, J., Redwing, E., Mainzer, A., et al., “Small and Nearby NEOs Observed by NEOWISE during the First Three Years of Survey: Physical Properties”, 2018, AJ, 156, 60.
  3. Masiero, J., Mainzer, A., Wright, E.L., “A Family-based Method of Quantifying NEOWISE Diameter Errors”, 2018, AJ, 156, 62.
  4. Masiero, J., "Palomar Optical Spectrum of Hyperbolic Near-Earth Object A/2017 U1". 2017, arXiv:1710.09977.
  5. Masiero, J.; Nugent, C.; Mainzer, A.; et al., "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos". 2017, AJ, 154, 168.
  6. Nugent, C., Mainzer, A. ..., Masiero, J., et al., “NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos”, 2016, AJ, 152, 63.
  7. Wright, E.L.; Mainzer, A.; Masiero, J., et al., “The Albedo Distribution of Near-Earth Asteroids”, 2016, AJ, 152, 79.
  8. Mainzer, A., Bauer, J.M.; ...,  Masiero, J.; et al.; "NEOWISE Diameters and Albedos V1.0”:, 2016, NASA Planetary Data System, EAR-A-COMPIL-5-NEOWISEDIAM-V1.0.
  9. Kaluna, H.; Masiero, J.; Meech, K.; "Space weathering trends among carbonaceous asteroids''. 2015, Icarus, 264, 62.
  10. Nugent, C.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R.M.; et al.; "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos''. 2015, ApJ, 814, 117.
  11. Masiero, J.; Carruba, V.; Mainzer, A.; Bauer, J.M.; Nugent, C.; "The Euphrosyne Family’s Contribution to the Low Albedo Near-Earth Asteroids”. 2015, ApJ, 809, 179.
  12. Masiero, J.R.; DeMeo, F.; Kasuga, T.; Parker, A.H.; “Asteroid Family Physical Properties". 2015, Asteroids IV (eds. P. Michel, F. DeMeo, W.F. Bottke), University of Arizona Press, 323.
  13. Mainzer, A.; Grav, T.; Bauer, J.; Conrow, T.; Cutri, R.M.; Dailey, J.; Fowler, J.; Giorgini, J.; Jarrett, T.; Masiero, J.; et al.; “Survey Simulations of a New Near-Earth Asteroid Detection System". 2015, AJ, 149, 172.
  14. Mainzer, A.; Bauer, J.; Cutri, R.; Grav, T.; Masiero, J.; et al.; “Initial performance of the NEOWISE Reactivation Mission". 2014, ApJ, 792, 30.
  15. Masiero, J.R.; Grav, T.; Mainzer, A.K.; Nugent, C.R.; Bauer, J.M; Stevenson, R.; Sonnett, S.; “Main-belt Asteroids with WISE/NEOWISE: Near-Infrared Albedos". 2014, ApJ, 791, 121.
  16. Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al.; “The Population of Tiny Near-Earth Objects Observed by NEOWISE". 2014, ApJ, 784, 110.
  17. Masiero, J.R.; Mainzer, A.K.; Bauer, J.M; Grav, T.; Nugent, C.R.; Stevenson, R.; "Asteroid Family Identification Using the Hierarchical Clustering Method and WISE/NEOWISE Physical Properties" . 2013, ApJ, 770, 7.
  18. Mainzer, A.; Grav, T.; Masiero, J.R.; Bauer, J.; et al.; Physical Parameters of Asteroids Estimated from the WISE 3 Band Data and NEOWISE Post-Cryogenic Survey". 2012, ApJL, 706, 12.
  19. Masiero, J.R.; Mainzer A.; Grav, T.; Bauer, J.; Nugent, C.; Cabrera, M.S.; Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-Cryogenic Observations of Main Belt Asteroids". 2012, ApJL, 759, 8.
  20. Masiero, J.; Mainzer, A.; Grav, T.; Bauer, J.; Jedicke, R.; Revising the age for the Baptistina asteroid family using WISE/NEOWISE data". 2012, ApJ, 759, 14.
  21. Masiero, J.; Mainzer, A.; Grav, T.; et al; "A revised asteroid polarization-albedo relationship using WISE/NEOWISE data". 2012, ApJ, 749, 104.
  22. Mainzer, A., Grav, T., Bauer, J., Masiero, J., et al; “NEOWISE observations of Near-Earth Objects: Preliminary Results”, 2011, ApJ, 743, 156.
  23. Masiero, J.; Mainzer, A., Grav, T., et al; “Main Belt Asteroids with WISE/NEOWISE: Preliminary Albedos and Diameters, 2011, ApJ, 741, 68
  24. Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al; Preliminary Results from NEOWISE: An Enhancement to the Wide-Field Infrared Survey Explorer for Solar System Science". 2011, ApJ, 731, 53.
  25. Masiero, J. "Albedo heterogeneity on the surface of (1943) Anteros". 2010, Icarus, 207, 795.
  26. Masiero, J.; Hartzell, C.; Scheeres, D.J. "The effect of the dust size distribution on asteroid polarization". 2009, AJ, 138, 1557.
  27. Masiero, J.; Jedicke, R.; Durech, J.; Gwyn, S.; Denneau, L.; Larsen, J. "The Thousand Asteroid Light Curve Survey". 2009, Icarus, 204, 145.
  28. Masiero, J.; Cellino, A. "Polarization of asteroid (387) Aquitania: the newest member of a class of large inversion angle asteroids". 2009, Icarus, 199, 333.
  29. Masiero, J.; Hodapp, K.; Harrington, D.; Lin, H. "Commissioning of the Dual-Beam Imaging Polarimeter for the UH 88-inch telescope". 2007, PASP, 119, 1126.
  30. Masiero, J.; Charlton, Jane C.; Ding, J.; Churchill, Christopher W.; and Kacprzak, G. "Models of Five Absorption Line Systems Along the Line of Sight Toward PG 0117+213." 2005, ApJ, 623, 57.

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