The Double-Station Observations from Sternwarte Herne and Herford Bernd Brinkmann, Sternwarte Herne MOD WS#3, 17.04. - 20.04.2010, ESA Noordwijk

The location: overview of Germany Herford Herne

The location: distance 120 km

The stations: HERMINE, operated by Bernd Brinkmann, Herne Mintron with 6 mm f/0.8 Computar lens in weatherproof housing MINCAM2, operated by Jörg Strunk, Herford HERMINE, operated by Bernd Brinkmann, Herne

HERMINE: weatherproof housing with heated entrance window

Entrance of video and power cable into the building

The view to the northeast: in the foreground is the dome of the planetarium of Sternwarte Herne

The area where HERMINE looks at: notice the chimney and the cooling towers

First evaluations: Perseides (04.-24.08.2008) vg (km/s) a (AU) q (AU) e p (a) Ω (°) ω (°) i (°) H1 (km) H2 (km) own measurements (all samples) 47 57,96 ± 2,04 6,10 ± 41,1 0,94 ± 0,018 0,86 ± 0,13 15,09 140,57 ± 3,32 147,54 ± 5,1 112,41 ± 2,5 107,0 94,2 own measurement (only 13.08.08) 16 58,22 ± 1,92 5,71 ± 48,3 0,94 ± 0,015 0,86 ± 0,12 16,63 140,59 ± 0,45 147,61 ± 4,2 112,46 ± 2,3 107,3 93,1 Literature * 87 59,38 71,4 0,953 ± 0,009 140,19 ± 3,3 151,3 ± 2,3 113,22 ±1,5 * Peter Jenniskens, Meteor Showers and their Parent Comets, Cambridge University Press, 2006, p.740

Statistic 2008 Ø Station Herford: ~50% Ø Station Herne: ~20% Datum BB JS 25.04.2007 11 5 03.05.2007 6 8 07.10.2007 34 19.10.2007 96 47 21.10.2007 156 65 22.10.2007 158 61 30.10.2007 57 16 18.11.2007 49 15.12.2007 55 10 18.12.2007 30 21.12.2007 41 21 Ø Station Herford: ~50% Ø Station Herne: ~20%

Statistic 2009 Month BB JS double January 438 176 38 February 95 37 6 March 169 55 April 218 85 61 May 214 59 36 June 118 1 July 290 99 August 1245 542 260 September 537 163 72 Oktober 630 18 November 326 107 25 December 470 124 40

all double station radiants in 2009:

all ground traks in 2009 with Q2:

all orbits in 2009 with Q2:

Pole view of Perseid orbits in 2009 with Q2:

Top view of Perseid orbits in 2009 with Q2: