Changes implemented between Ver 1 and Ver 2 of the NEOWISE asteroid diameter data table: -For all objects with provisional designations, we have updated their names in all fit tables to reflect the current primary designation as of 4 Sep 2018 as assigned by the MPC and published in the relevant object naming files. Objects that have been numbered between the previous version and this release have likewise been updated. -Physical property tables for near-earth objects and Main Belt asteroids published in Nugent et al. (2016), Masiero et al. (2017), and Masiero et al. (2018) have been added to the appropriate physical property tables. New data tables added: - 229 NEO fits from Nugent et al. 2016 - 6148 MBA fits from Nugent et al. 2016 - 202 NEO fits from Masiero et al. 2017 - 6867 MBA fits from Masiero et al. 2017 - 116 NEO fits from Masiero et al. 2018 -Due to a typo in the thermal model code output, fit results for objects with fixed beaming parameters were reporting approximations of the error on the beaming parameter, not the actual error used for the Monte Carlo error analysis. The BEAMING_PARAM_ERR column has been updated to reflect the actual value used for the error analysis. -In Version 1, a small number of objects appeared in multiple mutually exclusive lists (e.g. Main Belt and Trojan). This occurred when objects were initially fit with an orbit in one class (usually Main Belt asteroids) and given a designation as such (at which point they were included in analysis of Main Belt asteroids and associated papers), and then later linked by the Minor Planet Center to other observations resulting in a new orbit and new classification. Orbits where the semimajor axis has changed by more than 1 AU between the time of fitting and the present orbit solution have been noted as such with the label "OrbChange". In other cases, objects with short arcs that had published orbits in the MPC catalog when the fits were originally produced now no longer have orbits listed by the MPC. These fits have been noted as such with the label "NoOrb". Total numbers of objects with changed or removed orbits: - 382 MBAs from Mas11 - 7 MBAs from Mas12 - 1 Hilda from Gr12a - 4 Trojans from Gra11 -In the Nug15 and Nug16 source papers, the lower limit on perihelion distance for the Main Belt asteroid tables was set to 1.3 AU instead of 1.666 AU. Additionally, no upper limit on semimajor axis was used for filtering. Thus, those Main Belt tables contain some non-Main Belt objects. -Mainzer et al. (2011b) used the NEATM to see whether the surface brightnesses of asteroids and satellites with known diameters could be reproduced in order to verify the calibration of the then-newly-launched WISE mission's bandpasses for extremely red objects. This set of 117 objects was drawn from radar, occultation, and spacecraft data. Those fits have a '-' instead of a 'D' in the model fit code. Asteroids have red spectral energy distributions (SEDs), and the WISE bandpasses are broad. Mainzer et al. (2011b) sought to verify that the zeropoints and color corrections derived for the WISE bandpasses from calibrator stars (which are blue) and Active Galactic Nuclei (which tend to be red but can be variable) were appropriate for objects with very red SEDs such as asteroids. To that end, the differences between model and observed magnitudes were plotted vs. the asteroid calibrator objects' sub-solar temperatures when their diameters were held fixed to previously published values in order to verify that the newly derived color corrections worked properly for these asteroids, which are much cooler than stars. These fixed-diameter fits were then included in the fit tables of Masiero et al. (2011) and Mainzer et al. (2011c) to ensure consistency among the NEOWISE team papers. During the review process for the Mainzer et al. (2011b) paper, the referee requested that the table be restricted to objects with light curve amplitudes <0.3 mag, resulting in the final published table only having 48 listed calibration objects. Due to a clerical error, the team did not update the other paper tables, resulting in fixed diameters that did not have references to the calibration source. To better trace the provenance of the diameters used for these fits in this data release, we have created a separate list of all fits that used a fixed diameter, titled "neowise_fixed_diameter_fits", and have included a second reference column to provide the source of the diameter. -The tabulated values in Ver 1 from Masiero et al. (2014) used an unfiltered table that had not had the selection cuts as specified in the text. These fits were conducted in the same manner as presented in the paper, but did not meet the criterion of having a fitted infrared albedo in both short wavelength bands to be included in the published table. Due to this clerical error, 975 fits of 812 objects were inadvertently used in the first PDS release to replace fits from the original Masiero et al. (2011) fits. We have reverted these fits back to the 2011 values. Fourteen of these reverted fits used a fixed diameter from an external reference source to better constrain the other model properties. They are: (2), (13), (36), (46), (53), (54), (84), (105), (134), (313), (336), (345), (2867). These fits have been moved to the table of fixed diameter fits, and references to the calibration diameter source are included therein. -For 20 fits from Mainzer et al. (2014), the Fast-Rotating Model of thermal emission was employed. To better highlight these fits, we replace the 'B' fitted beaming flag with an 'F' signifier instead in the fit code, and list values of the beaming parameter and beaming error as 0.000. In addition, some objects had incorrect 'I' fit codes listed upon table compilation, which have been fixed. -Nine objects from Mainzer et al. (2014) were inadvertently left out of the PDS Ver 1 table. These have been included in Ver 2. -The tabulated values in Ver 1 from Grav et al. (2012a) of Hilda asteroids did not use the final table presented in the paper due to a clerical error. Correction of this has resulted in minor changes to the uncertainties on the fitted parameters of most Hilda fits, and the removal of object 2010 MM92 from the table which was not in the final published version of the paper. -Three objects presented in Ver 1 used names based on MPC-published tracklet linkages that were later found to be in error and corrected by the MPC. NEOWISE observations of 2010 JE90 were originally linked to 2009 HN14 and published in Ver 1 under that name. That object has subsequently been numbered, and the tracklet for 2010 JE90 divorced from this object. 2010 JE90 now is a short-arc tracklet with no orbit in the MPC database. NEOWISE observations of 2010 FH106 were originally linked to 2011 EU61 and published under that name in Ver 1. Subsequent analysis by the MPC has shown that this tracklet belongs to asteroid (462971). The physical property fit is now published under the numbered designation, and 2011 EU61 has no associated NEOWISE observations and thus does not appear in the PDS Ver 2 tables. Two sets of observations for object 2010 OB91 were published in Ver 1. The observations from Feb 2010 have subsequently been linked to (433458) and the fit to those detections is now published under that name, while the observations from Jul 2010 are correctly listed under that name, but have no orbit in the MPC catalog. It is possible there are additional broken linkages, however to our knowledge there is no catalog of broken linkages publicly supplied by the MPC to allow us to perform a comprehensive search. References: Grav, T., Mainzer, A., Bauer, J., et al., 2012a, "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy", ApJ, 759, 49. Mainzer, A., Grav, T., Masiero, J., et al., 2011b, "Thermal Model Calibration for Minor Planets Observed with Wide-field Infrared Survey Explorer/NEOWISE", ApJ, 736, 100. Mainzer, A., Grav, T., Bauer, J., et al., 2011c, "NEOWISE observations of Near-Earth Objects: Preliminary Results", ApJ, 743, 156. Mainzer, A., Bauer, J. Grav, T., et al., 2014, "The Population of Tiny Near-Earth Objects Observed by NEOWISE", ApJ, 784, 110. Masiero, J., Mainzer, A., Grav, T., et al., 2011, "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters", ApJ, 741, 68. Masiero, J., Grav, T., Mainzer, A., et al., 2014, "Main-belt Asteroids with WISE/NEOWISE: Near-infrared albedos", 791, 121. Masiero, J., Nugent, C., Mainzer, A., et al., 2017, "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos", AJ, 154, 168. Masiero, J., Redwing, E., Mainzer, A., et al., 2018, "Small and Nearby NEOs Observed by NEOWISE During the First Three Years of Survey: Physical Properties", AJ, 156, 60. Nugent, C., Mainzer, A., Masiero, J., et al., 2015, "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos", ApJ, 814, 117. Nugent, C., Mainzer, A., Bauer, J., et al., 2016, "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos", AJ, 152, 63.