Predictions & Information

October's new Moon perfectly favours the Orionids at their peak in 2009. The shower's radiant, near the celestial equator, is at a useful elevation by around local midnight in either hemisphere, so most of the world can enjoy the shower. The shower peaks on October 21st, but has previously been noted to have several lesser peaks, sometimes helping activity to remain roughly constant for several consecutive nights centred on this peak. Observers should be aware of this possibility and attempt to observe for multiple nights.

Previous years have produced unexpectedly strong Orionid rates, with ZHRs better than the normal peak seen on two or three consecutive nights, at best up to 50-70. It will be interesting to see what takes place this year.

Visual observations can be reported through the Report Form and are as always highly appreciated. The observations are automatically included in an automated ZHR graph.

Although the major northern hemisphere Perseids are badly affected by the last quarter Moon near their best this year, there is the possibility they may produce somewhat increased rates. The usual maximum is due around August 12, 17h30m-20h00m UT, but Esko Lyytinen suggests we may encounter the 1610 Perseid trail earlier on August 12, around 9h00m UT (λo = 139°661). This could produce activity additional to the normal Perseid ZHRs then of a few tens, maybe up to a hundred. Mikhail Maslov confirmed this but for 8h00m UT and with only 10-15 meteors per hour. Both reseachers further suggest that rates overall could be enhanced above usual by the proximity of the annual stream's core.

The Lyrids are expected to peak on 2009 April 22 around 11h UT (ZHR ~20). Past observations have shown the maximum time to be variable from year to year; in 2009 the peak could occur between 3h and 14h UT on April 22. The radiant of this shower, between Lyra and Hercules, rises during the night. Watches can be usefully carried out from about 22h30m local time onwards from mid-northern sites, but only from well after midnight from the mid-southern hemisphere. The waning crescent Moon will rise too late in the night in the northern hemisphere to cause any problems. More information about this shower can be found in the 2009 Shower Calendar.

Visual observations can be reported through the Report Form and are highly appreciated. The observations are automatically included in an automated ZHR graph.