[meteorite-list] Huge news: 1st find from 4/6/2002 Bavarian Bolide [PART 2 of 2]
From: Matson, Robert <ROBERT.D.MATSON_at_meteoritecentral.com>
Date: Thu Apr 22 10:00:12 2004 Message-ID: <AF564D2B9D91D411B9FE00508BF1C86901B4E276_at_US-Torrance.mail.saic.com> This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C237F7.6D5D8350 Content-Type: text/plain; charset="iso-8859-1" [CONTINUED from PART 1] "The fireball started its almost 92 km long luminous trajectory at an altitude of 85.6 km about 15 km NE from Innsbruck, Austria (longitude 11.564 deg E, latitude 47.304 deg N). Maximum brightness of about -18 absolute magnitude was reached in a bright flare at a height of 21 km near Garmisch-Partenkirchen, Germany (longitude 10.91 deg E, latitude 47.51 deg N). The fireball terminated at an altitude of only 15.8 km about 20 km W from Ga-Pa (longitude 10.85 deg E, latitude 47.53 deg N). Such deep penetration of a fireball is very scarce and this fireball belongs to the deepest ever-photographed fireballs in the history. It also implicates, that some part of the initial mass survived the ablation processes in the atmosphere and landed on the ground as meteorites. The slope of the atmospheric trajectory to the Earth's surface was 49.5 degrees. The fireball entered the atmosphere with the velocity of 20.9 km/s and during its flight substantially decelerated to the final value of only 4 km/s, when ablation process was stopped. According to the dynamic behavior in the atmosphere this fireball belongs to the fireball type I, which is usually identified with stony material, mostly ordinary chondrites. The initial dynamic mass of the entering meteoroid was about 500 kg and most of this mass was ablated and only about 30 kg of total mass could land on the ground in several fragments. The impact area is relatively large, it is at least several kilometers long and about 1km wide. The main fragments will lie eastwards from Schwangau, Germany. Smaller fragments could be found also around the Austria-Germany border westwards from Ga-Pa. The whole area is located in high mountains (the Alps), which is unfortunately very unfavorable for any systematic search. "From the exact time of the fireball occurrence, its initial velocity, and the position of the radiant, we computed the heliocentric orbit. We found that the body, before its collision with Earth, orbited the Sun on an elliptic orbit defined by the following orbital elements: semimajor axis 2.4 AU, eccentricity 0.67, perihelion distance 0.79 AU, argument of perihelion 241.4 degrees, longitude of ascending node 16.8 degrees and inclination 11.4 degrees. Such kind of heliocentric orbit is quite usual for fireballs which penetrate very deep into the Earth's atmosphere and which can produce meteorites. The aphelion of these orbits lies in the main belt of Asteroids and therefore the asteroidal origin of these bodies is inferred. However, the heliocentric orbit of this fireball has one very significant exceptionality: we found that this orbit is the same as the orbit of the first photographed meteorite fall in the history - the Pribram meteorite fall on April 7, 1959. Both orbits are so close that there is no doubt that both bodies have the same origin. It is very important evidence for the existence of asteroidal streams and meteorite streams as suggested earlier by Halliday and others. From observations of both bolides we know that both bodies were far from each other in the orbit (probably about half of the period) when the Pribram collided with the Earth. It implies that many such bodies have to be on this orbit, because it is fantastic chance to photograph two meteorite falls from the same orbit on practically the same territory within only 43 years! It also substantiates why it is important to operate such long term observing program as the European Fireball Network is. "Finally, from the perfect similarity of both heliocentric orbits we can predicate, that both bodies had also the same composition and therefore we can expect that meteorites produced by the April 6 fireball are H5 ordinary chondrites." --Pavel Spurny --Astronomical Institute of the Academy of Sciences --Ondrejov Observatory --The Czech Republic --e-mail: <mailto:spurny_at_asu.cas.cz> spurny@asu.cas.cz If this meteorite should prove to be an H5, and paired to Pribram, this will be a very huge discovery indeed! I'm sure we are all very anxious to hear about classification results! Congratulations again, and good hunting for additional specimens! --Rob -----Original Message----- From: Thomas Kurtz [mailto:thomas.kurtz_at_stud.fh-hannover.de] Sent: Tuesday, July 30, 2002 7:50 AM To: Meteoriten-Mailingliste Subject: [meteorite-list] NEW ! ! ! First found of the Neuschwanstein" Meteorite Hello list, The first piece is 1750g big ! It was found on 14.7.2002 , 6 km SO from "Neuschwanstein"-castle ! Very nice individual and very fresh ! Look this Link for picture : http://www.wetteragentur.de/modules.php?op=modload <http://www.wetteragentur.de/modules.php?op=modload&name=News&file=article&s id=10556&mode=&order=0> &name=News&file=article&sid=10556&mode=&order=0 With best wishes, Thomas Kurtz. Web Site : http://www.stud.fh-hannover.de/~kurtzt <http://www.stud.fh-hannover.de/~kurtzt> Mobile-phone : +49 (0) 160-98117639 ------_=_NextPart_001_01C237F7.6D5D8350 Content-Type: text/html; charset="iso-8859-1" <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META content="MSHTML 5.00.3315.2870" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002><SPAN class=207154018-30072002>[CONTINUED from PART 1]</SPAN></SPAN></FONT></FONT></FONT></DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002><SPAN class=207154018-30072002></SPAN><BR>"The fireball started its almost 92 km long luminous trajectory at an<BR>altitude of 85.6 km about 15 km NE from Innsbruck, Austria (longitude 11.564 deg<BR>E, latitude 47.304 deg N). Maximum brightness of about -18 absolute magnitude<BR>was reached in a bright flare at a height of 21 km near Garmisch-Partenkirchen,<BR>Germany (longitude 10.91 deg E, latitude 47.51 deg N). The fireball terminated<BR>at an altitude of only 15.8 km about 20 km W from Ga-Pa (longitude 10.85 deg E,<BR>latitude 47.53 deg N). Such deep penetration of a fireball is very scarce and<BR>this fireball belongs to the deepest ever-photographed fireballs in the history.<BR>It also implicates, that some part of the initial mass survived the ablation<BR>processes in the atmosphere and landed on the ground as meteorites. The slope of<BR>the atmospheric trajectory to the Earth's surface was 49.5 degrees. The fireball<BR>entered the atmosphere with the velocity of 20.9 km/s and during its flight<BR>substantially decelerated to the final value of only 4 km/s, when ablation<BR>process was stopped. According to the dynamic behavior in the atmosphere this<BR>fireball belongs to the fireball type I, which is usually identified with stony<BR>material, mostly ordinary chondrites. The initial dynamic mass of the entering<BR>meteoroid was about 500 kg and most of this mass was ablated and only about 30<BR>kg of total mass could land on the ground in several fragments. The impact area<BR>is relatively large, it is at least several kilometers long and about 1km wide.<BR>The main fragments will lie eastwards from Schwangau, Germany. Smaller fragments<BR>could be found also around the Austria-Germany border westwards from Ga-Pa. The<BR>whole area is located in high mountains (the Alps), which is unfortunately very<BR>unfavorable for any systematic search.</SPAN></FONT></FONT></FONT></DIV> <DIV><FONT color=#0000ff><SPAN class=046035817-30072002><FONT face=Arial size=2><BR>"From the exact time of the fireball occurrence, its initial velocity, and the<BR>position of the radiant, we computed the heliocentric orbit. We found that the<BR>body, before its collision with Earth, orbited the Sun on an elliptic orbit<BR>defined by the following orbital elements: semimajor axis 2.4 AU, eccentricity<BR>0.67, perihelion distance 0.79 AU, argument of perihelion 241.4 degrees,<BR>longitude of ascending node 16.8 degrees and inclination 11.4 degrees. Such kind<BR>of heliocentric orbit is quite usual for fireballs which penetrate very deep<BR>into the Earth's atmosphere and which can produce meteorites. The aphelion of<BR>these orbits lies in the main belt of Asteroids and therefore the asteroidal<BR>origin of these bodies is inferred. However, the heliocentric orbit of this<BR>fireball has one very significant exceptionality: we found that this orbit is<BR>the same as the orbit of the first photographed meteorite fall in the history -<BR>the Pribram meteorite fall on April 7, 1959. Both orbits are so close that there<BR>is no doubt that both bodies have the same origin. It is very important evidence<BR>for the existence of asteroidal streams and meteorite streams as suggested<BR>earlier by Halliday and others. From observations of both bolides we know that<BR>both bodies were far from each other in the orbit (probably about half of the<BR>period) when the Pribram collided with the Earth. It implies that many such<BR>bodies have to be on this orbit, because it is fantastic chance to photograph<BR>two meteorite falls from the same orbit on practically the same territory within<BR>only 43 years! It also substantiates why it is important to operate such long<BR>term observing program as the European Fireball Network is.<BR><BR>"Finally, from the perfect similarity of both heliocentric orbits we can<BR>predicate, that both bodies had also the same composition and therefore we can<BR>expect that meteorites produced by the April 6 fireball are H5 ordinary<BR>chondrites."<BR><BR>--Pavel Spurny<BR>--Astronomical Institute of the Academy of Sciences<BR>--Ondrejov Observatory<BR>--</FONT></SPAN></FONT><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002><FONT size=2>The Czech Republic<BR>--e-mail: </FONT><A href="mailto:spurny_at_asu.cas.cz" target=_top><FONT color=#000099 size=2>spurny_at_asu.cas.cz</FONT></A></SPAN></FONT></FONT></DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002></SPAN></FONT></FONT></FONT> </DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002>If this meteorite should prove to be an H5, and paired to Pribram, this will</SPAN></FONT></FONT></FONT></DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002>be a very huge discovery indeed! I'm sure we are all very anxious to hear</SPAN></FONT></FONT></FONT></DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002>about classification results!</SPAN></FONT></FONT></FONT></DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002></SPAN></FONT></FONT></FONT> </DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002>Congratulations again, and good hunting for additional specimens! --Rob</SPAN></FONT></FONT></FONT></DIV> <DIV><FONT size=2><FONT color=#0000ff><FONT face=Arial><SPAN class=046035817-30072002> </DIV></SPAN></FONT></FONT></FONT> <DIV><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Thomas Kurtz [mailto:thomas.kurtz_at_stud.fh-hannover.de]<BR><B>Sent:</B> Tuesday, July 30, 2002 7:50 AM<BR><B>To:</B> Meteoriten-Mailingliste<BR><B>Subject:</B> [meteorite-list] NEW ! ! ! First found of the Neuschwanstein" Meteorite<BR><BR></FONT></DIV> <DIV><FONT face=Arial size=2>Hello list,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The first piece is 1750g big ! It was found on 14.7.2002 , 6 km SO from "Neuschwanstein"-castle !</FONT></DIV> <DIV><FONT face=Arial size=2>Very nice individual and very fresh !</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Look this Link for picture :</FONT></DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT> <DIV><BR><A href="http://www.wetteragentur.de/modules.php?op=modload&name=News&file=article&sid=10556&mode=&order=0">http://www.wetteragentur.de/modules.php?op=modload&name=News&file=article&sid=10556&mode=&order=0</A><BR><BR><FONT face=Arial size=2>With best wishes,</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Thomas Kurtz.</FONT></DIV> <DIV><FONT face=Arial size=2>Web Site : <A href="http://www.stud.fh-hannover.de/~kurtzt">http://www.stud.fh-hannover.de/~kurtzt</A></FONT></DIV> <DIV><FONT face=Arial size=2>Mobile-phone : +49 (0) 160-98117639<BR></FONT></DIV></DIV></BODY></HTML> ------_=_NextPart_001_01C237F7.6D5D8350-- Received on Tue 30 Jul 2002 02:32:15 PM PDT |
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