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(meteorobs) IMO Shower Circ: No outburst from Schwassmann-Wachmann 3
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I M O S h o w e r C i r c u l a r
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NO ACTIVITY FROM COMET SCHWASSMANN-WACHMANN 3 IN 2001
Dust trails produced by Comet Schwassmann-Wachmann 3 near its
perihelion passages may get close to the Earth and produce
meteor activity. Computations of the evolution of such dust
trails by H. Luthen (Germany) showed an approach to the 1941
trail for May 30, 2001, 10h UT (solar longitude 69.04 deg).
The encounter was not very close, and chances to see a meteor
outburst were slim.
Several observers reported their results from visual and
video monitoring in the nights of May 24 to May 30. Apart
from very few possible shower members, no meteor activity
from Schwassmann-Wachmann 3 was observed. Unfortunately,
no report was received for the time after May 30, 12h UT.
The following observers sent in their observations directly
to the Visual Commission or communicated their results via
the mailing list 'meteorobs@jovian.com'. We are very grateful
for their quick contributions.
ARLRA Rainer Arlt (Germany)
BETFE Felix Bettonvil (the Netherlands, VIDEO)
DECGO Goedele Decononck (Belgium)
HOLDA David Holman (USA)
JENPE Peter Jenniskens (USA)
JOHCA Carl Johannink (the Netherlands)
KOOMI Mike Koop (USA)
LANMA Marco Langbroek (the Netherlands)
LUNRO Robert Lunsford (USA)
MOLSI Sirko Molau (Germany, VIDEO)
RENJU Jurgen Rendtel (Germany)
STORO Rosta Stork (Czech Republic, VIDEO)
TRIJO Josep M. Trigo-Rodriguez (Spain)
TUKAR Arnold Tukkers (the Netherlands)
VERCI Cis Verbeeck (Belgium)
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May Observer Time (UT) N ZHR hR
2001 SW3 (app./true)
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24 JOHCA 2154-2216 0 - 68/65
25 LANMA 2145-2245 1 1.5 68/64
25 TUKAR 2145-2245 0 - 68/64
25 JOHCA 2145-2305 1 1.2 67/63
25 TUKAR 2245-2345 0 - 63/59
25 LANMA 2246-0000 0 - 62/58
25 JOHCA 2305-0005 0 - 61/56
25 TUKAR 2345-0045 1 2.8 57/51
26 LANMA 0000-0112 0 - 54/48
26 JOHCA 0005-0105 0 - 54/48
26 TUKAR 0045-0115 0 - 52/45
29 STORO 2100-0130 1 (video obs.)
29 MOLSI 2103-0215 0 (video obs.)
29 BETFE 2200-0230 0 (video obs.)
29 DECGO 2250-0020 0 - 60/55
29 VERCI 2258-0020 0 - 60/55
29 RENJU 2300-0036 0 - 55/49
30 ARLRA 0017-0100 0 - 49/41
30 TRIJO 0203-0305 0 - 39/30
30 LUNRO 0830-0933 0 - 54/44
30 LUNRO 0933-1035 0 - 40/31
30 HOLDA casual 0 -
30 JENPE casual 0 -
30 KOOMI casual 0 -
30 LUNRO 1035-1138 0 - 30/18
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Solar longitudes refer to equinox J2000.0. The geocentric
radiant position was assumed at alpha=212, delta=+28,
the population index used was r=3.0. The radiant elevation
is given as apparent and geocentric (true) values which
differ strongly for a low-velocity shower such as the
SW3-ids with an entry velocity of V_inf = 17 km/s.
It must thus be noted that shower association might be
erroneous as the radiant does NOT APPEAR at alpha=212,
delta=+28 as given theoretically, due to zenithal attrac-
tion. The above values of hR (app./true) indicate differ-
ences of up to 10 degrees.
Rainer Arlt,
2001 May 31
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