ABSTRACTS:
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Excerpted from: CDS-Bibliographic Service (©ULP/CNRS - Centre de Données
astronomiques de Strasbourg)
Link Page: http://simbad.u-strasbg.fr/A+A/map.pl
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1997A&A...317..594P
The orbital elements of a meteoroid after its ejection from a comet.
PECINA P., SIMEK M.
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1997A&A...317..594P - Astron. Astrophys., 317, 594-600 (1997) - January(II)
1997
"The orbital elements of a meteoroid after its ejection from a comet."
PECINA P., SIMEK M.
Abstract (from CDS): This article examines the changes in the orbital
elements of particles ejected from the nucleus of an active comet. We
extend the work of Plavec (1957PAICz..30...93P) to include changes in all
the orbital elements resulting from the ejection process. We take into
account the constraints that must be met before a meteoroid particle can be
observed as a meteor. In addition we constrain particle ejection to take
place only on the sun-ward hemisphere of the cometary nucleus and only when
the comet is less than 1.88 AU from the Sun. For a given true anomaly of
the ejection event, our equations allow the determination of the speed and
direction of the ejected particle. Using the ejection of particles from
comet P/Swift-Tuttle, we applied our approach in an attempt to explain
whether or not a new filament of activity first seen in 1986 could be
attributed to particles ejected from the comet near the time of its 1862
perihelion passage. Observed Perseid meteor rates in 1986 - 1995, expressed
as a function of the solar longitude, cannot be used to uniquely determine
the time the corresponding particles were ejected from the parent comet.
The observed meteor shower activity could have been caused by particles
that were ejected from the nucleus at a variety of times, velocities and
ejection angles.
Abstract Copyright: European Southern Observatory (ESO) 1997
Journal keyword(s): Solar system: comets - meteors, meteoroids
Link(s): Full paper ™ ADS services - ©ULP/CNRS - Centre de Données
astronomiques de Strasbourg
Other abstracts pertaining to cometary ejecta can be viewed at:
Link Page: http://techreports.jpl.nasa.gov/index.html
Here, is a fine abstract to begin your studies: "Long-Period Comets and the
Oort Cloud"
See This Link - For Abstract Above:
http://www.jpl.nasa.gov/techreport/1996/96-1340.rfr.html
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CMTWIN.EXE (c) 1997 Wm. Schwittek [Fixed Time Input] Page 01
Comet: c/1999 H1 (LEE) Lat:+52,00 Lon:-004,00 [+=W,N]
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Time Epoch 2000 Distance
(AU) Est
Date (UTC) RA Dec Alt Az Sun Earth Mag Elong
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07-24-99 00:00 07h40,2m +33.60' -03,5. 008,5. 00,75 01,68 +06,9 015,6.
07-27-99 00:00 07h36,2m +35.06' -02,0. 011,6. 00,78 01,67 +07,0 018,9.
07-30-99 00:00 07h32,0m +36.12' -00,4. 014,6. 00,80 01,64 +07,1 022,4.
08-02-99 00:00 07h27,7m +37.17' +01,4. 017,5. 00,83 01,62 +07,3 026,0.
08-05-99 00:00 07h23,3m +38.23' +03,2. 020,3. 00,87 01,59 +07,4 029,7.
08-08-99 00:00 07h18,6m +39.30' +05,3. 023,1. 00,90 01,55 +07,5 033,5.
08-11-99 00:00 07h13,7m +40.39' +07,4. 025,8. 00,94 01,51 +07,6 037,4.
08-14-99 00:00 07h08,3m +41.51' +09,7. 028,3. 00,97 01,47 +07,7 041,4.
08-17-99 00:00 07h02,4m +43.05' +12,2. 030,8. 01,01 01,42 +07,8 045,5.
08-20-99 00:00 06h55,9m +44.23' +14,8. 033,3. 01,05 01,38 +07,9 049,6.
08-23-99 00:00 06h48,5m +45.46' +17,7. 035,6. 01,10 01,33 +08,0 053,9.
08-26-99 00:00 06h40,0m +47.13' +20,8. 037,9. 01,14 01,27 +08,1 058,3.
08-29-99 00:00 06h30,1m +48.46' +24,2. 040,2. 01,18 01,22 +08,2 063,0.
09-01-99 00:00 06h18,3m +50.23' +27,9. 042,4. 01,22 01,17 +08,2 067,8.
09-04-99 00:00 06h04,2m +52.05' +31,9. 044,5. 01,27 01,12 +08,3 072,8.
09-07-99 00:00 05h47,0m +53.49' +36,2. 046,6. 01,31 01,07 +08,3 078,1.
09-10-99 00:00 05h25,9m +55.32' +41,0. 048,6. 01,35 01,02 +08,3 083,7.
09-13-99 00:00 05h00,0m +57.08' +46,3. 050,6. 01,39 00,97 +08,4 089,6.
09-16-99 00:00 04h28,6m +58.26' +52,1. 052,5. 01,44 00,93 +08,4 095,9.
09-19-99 00:00 03h51,5m +59.14' +58,3. 054,3. 01,48 00,89 +08,5 102,4.
09-22-99 00:00 03h09,8m +59.15' +65,1. 056,1. 01,52 00,86 +08,5 109,2.
09-25-99 00:00 02h25,9m +58.17' +72,4. 057,7. 01,57 00,84 +08,6 116,0.
09-28-99 00:00 01h43,4m +56.15' +80,0. 058,8. 01,61 00,83 +08,7 122,8.
10-01-99 00:00 01h05,0m +53.15' +87,8. 054,3. 01,65 00,83 +08,8 129,1.
10-04-99 00:00 00h32,4m +49.30' +84,3. 247,2. 01,70 00,84 +08,9 134,6.
10-07-99 00:00 00h05,7m +45.19' +76,5. 247,3. 01,74 00,86 +09,1 138,8.
10-10-99 00:00 23h44,1m +40.58' +69,1. 248,6. 01,78 00,89 +09,3 141,5.
10-13-99 00:00 23h26,9m +36.42' +62,0. 250,1. 01,82 00,93 +09,5 142,4.
10-16-99 00:00 23h13,2m +32.39' +55,4. 251,7. 01,87 00,98 +09,7 141,7.
10-19-99 00:00 23h02,2m +28.54' +49,4. 253,4. 01,91 01,04 +09,9 139,8.
10-22-99 00:00 22h53,4m +25.30' +43,8. 255,1. 01,95 01,10 +10,1 137,0.