Orionids 2006, Visual

The Orionids surprised with heightened activity in 2006. A considerable set of 146 observing priods was collected by 2006 October 25, 14h UT which leads to the below ZHR profile. The maximum was not sharp; high rates were observed throughout the European and most of the American night of Oct 21/22 with ZHR > 50. Large fractions of bright Orionids were reported by the observers. A population index of r=2.0 was assumed for that reason. Such a value is typical for strong showers like the Perseids or the Geminids. Sporadic meteors, for comparson, have a population index of roughly 3 implying a larger fraction of faint meteors. The Orionids used to have intermediate population indices in previous years.

[CSV] Date (UT), Time, Solarlong, nINT, nORI, ZHR Oct 20.008, 00:12, 206.374, 13, 90 ,22 +- 2 Oct 20.438, 10:31, 206.802, 9 ,208 ,31 +- 2 Oct 21.291, 06:59, 207.650, 18, 496, 47 +- 2 Oct 21.862, 20:41, 208.218, 13, 172, 56 +- 4 Oct 22.041, 00:59, 208.396, 12, 284, 52 +- 3 Oct 22.147, 03:32, 208.502, 12, 289, 57 +- 3 Oct 22.257, 06:10, 208.611, 11, 235, 53 +- 3 Oct 22.373, 08:57, 208.727, 13, 337, 44 +- 2 Oct 22.941, 22:35, 209.292, 8 ,104 ,42 +- 4 Oct 23.029, 00:42, 209.380, 11, 205, 44 +- 3 Oct 23.317, 07:36, 209.666, 7 ,244 ,36 +- 2 Oct 24.285, 06:50, 210.631, 12, 263, 35 +- 2 Oct 25.112, 02:41, 211.455, 7 ,105 ,27 +- 3 [/CSV]

Solar longitudes refer to eq. J2000.0. nINT is the number of observing periods in each average, nORI is the number of Orionids in each average.

We are grateful to the observers who sent in their data swiftly after the observation was made: Ricardas Balciunas (Lithuania), Geert Barentsen (Belgium), Ivana Cvijovic (Serbia), Nadja Dankova (Bulgaria), Gunther Fleerackers (Belgium), George Gliba (USA), William Godley (USA), Wayne Hally (USA), Carl Johannink (the Netherlands), Javor Kac (Slovenia), Petar Kostic (Serbia), Richard Kramer (USA), Jan Lemregts (Belgium), Robert Lunsford (USA), Sonja Manojlovic (Serbia), Pierre Martin (Canada), Paul Martsching (USA), Koen Miskotte (the Netherlands), Ian Musgrave (Australia), Tamara Radakovic (Serbia), Li Ren (China), Jurgen Rendtel (Germany), Branislav Savic (Serbia), Nastassia Smeets (Belgium), Wesley Stone (USA), Rishikesh Tilak (India), Marija Todorovic (Serbia), Hendrik Vandenbruaene (Belgium), Michel Vandeputte (Belgium), Jovan Vasiljevic (Serbia), Thomas Weiland (Austria), Kim Youmans (USA).