Important Note regarding the "Last Comet Observation" webpage: this is compiled from our astrometric archives; listed observations do not mean that they are real -- sometimes bad observations get past the software checks -- and the magnitudes are often off by several magnitudes. Further, the last observation does not mean that the specific comet either does or does not need observation urgently. At any rate, it is suggested that -- for most comets -- observations be made of each comet by each observer once or twice a week, 3-4 observations per night, if possible; more frequent observation by a single observer usually is not warranted or even encouraged -- being better to observe more objects in need of observation. And quality is always better than quantity!
Index to the CBAT/MPC/ICQ pages.