\begintext
 DynAstVO ephemeris
\begindata
NAIF_BODY_NAME+= ( '837253')
NAIF_BODY_CODE+= ( 20837253)
NAIF_BODY_NAME+= ( '2013 FW13')
NAIF_BODY_CODE+= ( 20837253)
\begintext
  DynAstVO magnitude parameters.
\begindata
BODY20837253_MAG_HG = ( 21.375 0.150 )