Author: Carl Johannink

October Camelopardalids by CAMS

CAMS BeNeLux collected 15 meteors belonging to a minor stream called the October Camelopardalids, (281 OCT) during routine CAMS observations on October 5, 2017. Radiant positions and orbital elements are in good agreement with previously reported results. 1  Introduction The weather in the first week of October 2017 was very unstable, so it is no surprise that our network could collect no more than 380 orbits during the few clear spells. Fortunately, October 5–6 was the best night for observing in this week. During this night 18 of the 21 stations had at least longer clear periods. They collected 99 orbits in this single night. 2  History In the course of the last century, observers noticed meteor activity from a region near the northern celestial pole, for instance in 1902, 1942 and 1976. On October 5, 2005 some video-observers in Finland (Moilanen, Yrjölä and Lyytinen) and Germany (Molau) captured several bright meteors from a radiant near the border of the constellations Draco and Camelopardalis. Moilanen captured 19 meteors in the period 17h06m– 22h41m UT. Twelve of them shared the same radiant. Most of these meteors appeared between 17h and 20h UT (Jenniskens et al., 2005). The mean radiant of these twelve meteors was calculated at RA = 164.1 ± 2.0 degrees and DE = 78.9 ± 0.5 degrees with a geocentric velocity of Vg = 46.9 ± 2.6 km/s. The mean...

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CAMS BeNeLux results April – June 2017

Summary The second quarter of 2017 allowed for the collection of orbits during 78 nights of the total of 91 nights. 4398 orbits were added to the CAMS database in this period.  Weather was very cooperative in April and June. Only the first half of May was hampered by some unsettled weather.     Figure 1 : performance graph of CAMS BeNeLux : number of simultaneous orbits collected since the start of this network in March 2012     APRIL:   April was dominated by a lot of clear nights  and with the exception of the nights April 16/17 and April 21/22 (Lyrid maximum), CAMS BeNeLux was able to collect a reasonable amount of orbits of meteors. Our cameras operated over a total of 11 000 hours. All in all April was a very successful month indeed. During the remaining 28 nights we collected 1235 orbits, and although we missed the Lyrid maximum, CAMS nevertheless obtained 62 orbits of Lyrids during other nights this month. Robert Haas (Alphen aan de Rijn – Netherlands) expanded his network with CAMS 367 and 368 starting April 7th. Jean Marie Biets (Wilderen-Belgium) added a third camera (CAMS 380) to his network on April 10th. Felix Bettonvil (Utrecht – Netherlands) was able to restart his CAMS 376 on April 17th. Unfortunately, Tim Polvliet (Gent-Belgium) stopped his CAMS activities at the end of April. Besides...

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Tau Herculids in 2017 observed by CAMS

Tau Herculids activity in 2017 recorded by CAMS   By Carl Johannink, Jaap van ’t Leven, Koen Miskotte   Abstract During routine CAMS observations in the night of May 30/31 CAMS BeNeLux collected five meteors in just over an hour, which are associated with comet 73P/Schwassmann-Wachmann. These five meteors appeared from a very narrow radiant, near RA=210 degrees  and DE=29 degrees, geocentric velocity (Vg) ~12 km/s,  with very similar orbits. Further searches on the nights around this peak showed another twelve candidates. The first five meteors very likely belong to the 1941-dusttrail of this comet, that was predicted to produce...

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The remainders of an old acquaintance: Eta Lyrids from comet IRAS-Araki-Alcock (C/1983 H1)

by Carl Johannink and Koen Miskotte Routine CAMS BeNeLux observations during the nights of May 9–10 and May 10–11 collected 26 meteors belonging to the eta Lyrids (145 ELY), which are associated with comet IRAS-Araki-Alcock (C/1983 H1). Further searches on the nights around this peak produced another 6 candidates. Radiant positions and orbital elements are in good agreement with previous CAMS results (Jenniskens et al., 2016). A short summary of historical visual observations is also given. 1  The origin of the Eta-Lyrids The η-Lyrids are the remainders from the long periodic comet C/1983 H1, better known as comet IRAS-Araki-Alcock with...

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2017 Eta Aquariids recorded by CAMS

Despite unfavorable weather conditions CAMS BeNeLux could collect 35 precise orbits of the Eta Aquariids stream in the last days of April and the first decade of May 2017. Radiant positions, radiant drift and orbital elements are in good agreement with the positions in previous work (Jenniskens et al., 2016). 1  Conditions in 2017 It is well known that observing the Eta Aquariids at the latitudes of the BeNeLux CAMS network (50°–53°) has something of playing ‘hide and seek’. The observing window for the BeNeLux sites remains restricted to the morning twilight of the first decade of May. This...

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