International Comet Quarterly

Notes concerning the most recent observations of comets

  • The most recent observation of each recently observed comet, as reported to the Minor Planet Center (astrometric data, about half of which have magnitudes). Important note: 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!

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