----------- Original Message ----- From: "Björn Gimle" <b_gimle@algonet.se> > IMHO, a low radiant is REQUIRED if it is to easily visible for over 1000 km > > ----- Original Message ----- > > > I think it is unlikely that this event is related to the Quadrantids. The > > radiant was a mere 7 degrees above the northern horizon for Madrid and a > day No, not necessarily. The fireball of the Glanerbrug meteorite fall in my country in 1990, which had its radiant at 40 degrees altitude, was seen from 400 km distance of its location (i.e., it could be seen over an area of at least 800 km wide): and that fireball, also a daylight one, wasn't as bright as this Spanish one, which must be at least mag -20 if I look at the video. An object that bright can be seen over quite some distance. If this fireball was over central Iberia, there would be no real problem seeing it both from the NW and the SE coast. But what really rules out the possibility of a Quadrantid, in an argument independant from whether the Spanish fireball traveled in a long flat trajectory or not, is that the direction of movement in the Leon video is opposite to what it should be if it was a Quadrantid. My remark about the low radiant altitude of the Quadrantids, was merely made because with such a low altitude, and the stream already a day past it's narrow peak, very little Quadrantid meteors would enter the Spanish atmosphere with such a low radiant altitude anyhow, so the statistical odds are not high in favour of a Quadrantid membership. But the remark about the wrong direction of movement in the Leon video, is a much stronger argument. - Marco ------ Marco Langbroek Dutch Meteor Society Leiden, the Netherlands 52.15896 N, 4.48884 E (WGS 84) e-mail: meteorites@dmsweb.org website: http://home.wanadoo.nl/marco.langbroek ------ ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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