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 Asteroids, Comets & Satellites: People
Joseph Masiero's Picture
Jet Propulsion Laboratory
M/S 183-601
4800 Oak Grove Drive
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(818) 393-5614
(818) 393-6236
Curriculum Vitae:

Joseph Masiero

  • 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.

Professional Experience
  • 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
  • JPL Science Division Mariner Award: NEOWISE restart (2014)
  • Asteroid 8255 Masiero (1981 EZ18) named in honor
  • NASA Group Achievement Award, NEOWISE team (2012)
  • Honorary Officer, NASA's First Planetary Defense Squadron (Provisional)
  • NASA Postdoctoral Program Fellowship 2009 - 2012
  • Graduated with Distinction and Honors (PSU) (2004)
  • Penn State Eberly College of Science Braddock Scholar (2000 - 2004)
  • Penn State Schreyer Honors College Scholar (2000 - 2004)

Selected Publications
  1. Masiero, J.R.; DeMeo, F.; Kasuga, T.; Parker, A.H.; “Asteroid Family Physical Proper-ties". 2015, Asteroids IV (eds. P. Michel, F. DeMeo, W.F. Bottke), University of Arizona Press, in press.
  2. 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, in press.
  3. Sonnett, S.; Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; “Binary Candidates in the Jovian Trojan and Hilda populations from NEOWISE lightcurves". 2015, ApJ, in press.
  4. Mainzer, A.; Bauer, J.; Cutri, R.; Grav, T.; Masiero, J.; et al.; “Initial performance of the NEOWISE Reactivation Mission". 2014, ApJ, 792, 30.
  5. 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.
  6. Stevenson, R.; Bauer, J.; Kramer, E.; Grav, T.; Mainzer, A.; & Masiero, J.; “Lingering grains of truth around comet 17P/Holmes". 2014, ApJ, 787, 116.
  7. Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al.; “The Population of Tiny Near-Earth Objects Observed by NEOWISE". 2014, ApJ, 784, 110.
  8. Ganguly, R.; Lynch, R.S.; Charlton, J.C.; ...; Masiero, J.R. ; et al.; "A census of quasar-intrinsic absorption in the Hubble Space Telescope archive: systems from high-resolution echelle spectra" . 2013, MNRAS, in press.
  9. Bauer, J.M.; Grav, T.; Blauvelt, E.; Mainzer, A.K.; Masiero, J.R. ; Stevenson, R.; et al.; "Centaurs and Scattered Disk Objects in the Thermal Infrared: Analysis of WISE/NEOWISE Observations". 2013, ApJ, 773, 22.
  10. Masiero, J.R.; Mainzer, A.K.; Bauer, J.M; Grav, T.; Nugent, C.R.; Stevenson, R.; "Asteroid Family Identication Using the Hierarchical Clustering Method and WISE/NEOWISE Physical Properties" . 2013, ApJ, 770, 7.
  11. Herenz, P.; Richter, P.; Charlton, J.C.; Masiero, J.R.; "The Milky Way halo as a QSO absorption-line system. New results from an HST/STIS absorption-line catalogue of Galactic high-velocity clouds". 2013, A&A, 550, A87.
  12. 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.
  13. Stevenson, R.; Kramer, E.A.; Bauer, J.M; Masiero, J.R.; Mainzer A.; Characterization of Active Main Belt Object P/2012 F5 (Gibbs): A Possible Impacted Asteroid". 2012, ApJ, 759, 142.2
  14. 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.
  15. Grav, T.; Mainzer A.; Bauer, J.; Masiero, J.R.; Nugent, C.; WISE/NEOWISE Observa- tions of the Jovian Trojan Population: Taxonomy". 2012, ApJ, 759, 49.
  16. Masiero, J.R.; Mainzer, A.; Grav, T.; Bauer, J.; Jedicke, R.; Revising the age for the Baptistina asteroid family using WISE/NEOWISE data". 2012, ApJ, 759, 14.
  17. Bauer, J.M.; Kramer, E., Mainzer, A.K.; Stevenson, R., Grav, T.; Masiero, J.; et al. WISE/NEOWISE Preliminary Analysis and Highlights of the 67p/Churyumov-Gerasimenko near Nucleus Environs". 2012, ApJ, 758, 18.
  18. Nugent, C.; Mainzer, A.; Masiero, J.; Grav, T.; Bauer, J.; "The Yarkovsky Drift's Inuence on NEAs: Trends and Predictions with NEOWISE Measurements". 2012, AJ, 144, 75.
  19. Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; et al; "Characterizing Subpopulations within the near-Earth Objects with NEOWISE: Preliminary Results". 2012, ApJ, 752, 110.
  20. Masiero, J.; Mainzer, A.; Grav, T.; et al; "A revised asteroid polarization-albedo relationship using WISE/NEOWISE data". 2012, ApJ, 749, 104.
  21. Bauer, J.M.; Mainzer, A.K.; Grav, T.; Walker, R.G.; Masiero, J.; et al. "WISE/NEOWISE observations of Active Bodies in the Main Belt". 2012, ApJ, 747, 49.
  22. 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.
  23. Masiero, J. "Albedo heterogeneity on the surface of (1943) Anteros". 2010, Icarus, 207, 795.
  24. Levesque, Emily M.; Bloom, Joshua S.;, Masiero, Joseph, "GRB090426: the environment of a rest-frame 0.35-s gamma-ray burst at a redshift of 2.609". 2010, MNRAS, 401, 963.
  25. Masiero, J.; Hartzell, C.; Scheeres, D.J. "The effect of the dust size distribution on asteroid polarization". 2009, AJ, 138, 1557.
  26. Price, A.; Masiero, J.; et al. "Polarimetry and the Long Awaited Superoutburst of BZ UMa". 2009, PASP, 121, 1205.
  27. Masiero, J.; Jedicke, R.; Durech, J.; Gwyn, S.; Denneau, L.; Larsen, J. "The Thousand Asteroid Light Curve Survey". 2009, Icarus, 204, 145.
  28. Richter, Philipp; Charlton, Jane C.; Fangano, Alessio P. M.; Ben Bekhti, Nadya; Masiero, Joseph R. "A population of weak metal-line absorbers surrounding the Milky Way". 2009, ApJ, 695, 1613.
  29. Masiero, J.; Cellino, A."Polarization of asteroid (387) Aquitania: the newest member of a class of large inversion angle asteroids". 2009, Icarus, 199, 333.
  30. Milutinovic, N.; Misawa, T.; Lynch, R. S.; Masiero, J. R.; Palma, C.; Charlton, J. C.; Kirkman, D.; Bockenhauer, S.; Tytler, D. "A Catalog of Absorption Lines in Eight HST/STIS E230M 1.0 < z < 1.7 Quasar Spectra". 2007, MNRAS, 382, 1094.
  31. 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.
  32. Maybhate, Aparna; Masiero, Joseph; Hibbard, J. E.; Charlton, Jane C.; Palma, Christopher; Knierman, Karen A.; and English, Jayanne. "An HI Threshold for Star Cluster Formation in Tidal Debris". 2007, MNRAS, 381, 59.
  33. Kubica, J.; Denneau, L.; Grav, T.; Heasley, J.; Jedicke, R.; Masiero, J.; Milani, A.; Moore, A.; Tholen, D.; Wainscoat, R.J. "Efficient intra- and inter-night linking of asteroid detections using kd-trees". 2007, Icarus, 189, 151.
  34. Milutinovic, Nikola; Rigby, Jane R.; Masiero, Joseph R.; Lynch, Ryan S.; Palma, Chris; and Charlton, Jane C. "The Nature of Weak MgII Absorbing Structures". 2006, ApJ, 641, 190.
  35. Masiero, Joseph R.; Charlton, Jane C.; Ding, J.; Churchill, ChristopherW.; 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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