▁S LS , ▁Ar tem is ▁ 1 , ▁as ▁secondary ▁pay loads ▁in ▁c is - l un ar ▁space , ▁in ▁ 2 0 2 1 . ▁It ▁will ▁be ▁deployed ▁during ▁lun ar ▁traject ory ▁and ▁will ▁use ▁an ▁innov ative ▁electric ▁R F ▁ion ▁engine ▁to ▁achieve ▁lun ar ▁capture ▁and ▁the ▁science ▁orbit ▁to ▁allow ▁the ▁team ▁to ▁make ▁system atic ▁measurements ▁of ▁lun ar ▁water ▁features ▁from ▁an ▁orbit ▁about ▁ ▁above ▁the ▁lun ar ▁surface . ▁ ▁The ▁Princi pal ▁Investig ator ▁is ▁Ben ▁Mal ph rus , ▁Director ▁of ▁the ▁Space ▁Science ▁Center ▁at ▁More head ▁State ▁University .). ▁ ▁History ▁NASA ' s ▁L un ar ▁Pro spect or , ▁Clement ine , ▁L un ar ▁Cr ater ▁Observ ation ▁and ▁S ens ing ▁Sat ellite ▁( LC RO SS ), ▁the ▁L un ar ▁Re con na issance ▁Or b iter ▁( L RO ) ▁and ▁India ' s ▁Ch and ray a an - 1 ▁lun ar ▁orbit ers ▁and ▁other ▁miss ions , ▁confirmed ▁both ▁water ▁( H 2 O ) ▁and ▁hydro x yl ▁( — OH − ) ▁depos its ▁at ▁high ▁lat itudes ▁on ▁the ▁lun ar ▁surface , ▁indicating ▁the ▁presence ▁of ▁trace ▁amounts ▁of ▁ad s or bed ▁or ▁bound ▁water ▁are ▁present , ▁but ▁their ▁instruments ▁wer en ' t ▁optimized ▁for ▁fully ▁or ▁system atically ▁character izing ▁the ▁elements ▁in ▁the ▁inf ra red ▁w avel ength ▁bands ▁ideal ▁for ▁detect ing ▁water .