final vers -1919429222 Assigned ID: 1925 ----- Attempting Submission 1 (Fri Mar 01 23:15:52 GMT 2013) ----- HST Phase I Proposal 1925 (HST_2013_AR.apt) successfully submitted. ----- Attempting Submission 2 (Sat Mar 02 00:26:12 GMT 2013) ----- HST Phase I Proposal 1925 (HST_2013_AR.apt) successfully submitted. ----- Attempting Submission 3 (Sat Mar 02 00:53:39 GMT 2013) ----- HST Phase I Proposal 1925 (HST_2013_AR.apt) successfully submitted. ----- Attempting Submission 4 (Sat Mar 02 00:58:31 GMT 2013) ----- HST Phase I Proposal 1925 (HST_2013_AR.apt) successfully submitted. ----- Attempting Submission 5 (Sat Mar 02 01:01:29 GMT 2013) ----- HST Phase I Proposal 1925 (HST_2013_AR.apt) successfully submitted. ----- Attempting Submission 6 (Sat Mar 02 01:01:44 GMT 2013) ----- We propose an archival project to use the Frontier Fields observations in Cycle 21 to measure the color distribution of dynamically hot TNOs smaller than the break in the TNO size distribution (R>25). By coadding the light from each two-orbit visit and accounting for the motion of the TNOs we will detect and measure statistically the colors of 10-50 very faint TNOs- of which there are none with known colors. By comparing the color distribution of objects larger and smaller and the break we will test whether the break in the size distribution of hot objects is collisional, and if the bluer colors of this population are primordial. SOLAR SYSTEM Default Medium false false false false false SUPPORTED false -1 -1