Comment codes are used as a way to easily and quickly identify a certain standard comment that might apply to an observation. The following comment codes may used:
- B — Sky is bright, moon, twilight, light pollution, aurorae
- U — Clouds, dust, smoke, haze, etc.
- W — Poor seeing*
- L — Low in the sky, near horizon, in trees, obstructed view
- D — Unusual Activity (fading, flare, bizarre behavior, etc.)
- Y — Outburst
- K — Non-AAVSO chart
- S — Comparison Sequence Problem
- Z — Magnitude of star uncertain
- I — Identification of star uncertain
- V — Faint star, near observing limit, only glimpsed
If you would like to add a comment that is not listed above, please use the "Comments" field to do so.
*Seeing is the blurring and twinkling of astronomical objects (such as stars) caused by turbulence in the Earth's atmosphere. The more twinkling the worse the seeing.