Publishable Notes For
Observations Of Minor Planets

The following one-letter codes may be included in observations submitted to the Minor Planet Center. 
  A  earlier approximate position inferior
  a  sense of motion ambiguous
  B  bright sky/black or dark plate
  b  bad seeing
  C  correction to earlier position
  c  crowded star field
  D  declination uncertain
  d  diffuse image
  E  at or near edge of plate
  F  faint image
  f  involved with emulsion or plate flaw
  G  poor guiding
  g  no guiding
  H  hand measurement of CCD image
  I  involved with star
  i  inkdot measured
  J  J2000.0 rereduction of previously-reported position
  M  measurement difficult
  N  near edge of plate, measurement uncertain
  O  image out of focus
  o  plate measured in one direction only
  P  position uncertain
  p  poor image
  R  right ascension uncertain
  r  poor distribution of reference stars
  S  poor sky
  s  streaked image
  T  time uncertain
  t  trailed image
  U  uncertain image
  u  unconfirmed image
  V  very faint image
  W  weak image
  w  weak solution