We request a single orbit of WFC/IR observations of the soft gamma repeater SGR 1935+2154. Our HST observations during a previous outburst have identified a candidate counterpart while the source was bright. A renewed period of intense activity has just begun, and it is likely that the source is now once again bright enough for a secure high signal to noise detection. Our new observation will enable a direct measurement of the proper motion of the source, allowing us trace it back to its place of birth, or put stringent limits on birth locations. Simultaneously the observations will also track the IR behaviour during outburst, and determine how it compares to its X-ray flux. The source is too faint for ground based observaitons, and these observations can only be obtained while the source is in outburst. Given the typical long quiescent periods for SGRs this new outburst may well represent the only opportunity to conduct these observations in the remaining lifetime of HST. We propose to obtain observations of the soft gamma-repeater SGR 1935+2154 which is currently in outburst. We will utilize the same approach as in our previous observaitons of this source, in particular we will use a 4 point dither in the F140W filter (4x600s of observations). We will use a position angle of 205.219 degrees to put the source at 90 degrees to our previous observations such that diffraction spikes from bright stars overlay. Stellar Physics Stellar Populations 0 SUPPORTED STAR NEUTRON STAR J2000 WFC3/IR Imaging No No F140W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1 false 1463684574449 The scheduling data was generated by CASM 24.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14502 :visit-id "01" :proposal-version -1 :trans-version "20160322" :date "19-May-2016 20:02:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 905248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14502 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14502 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2624 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2993 :pcs-gap 0 ) false 1 0