[meteorite-list] x-Boötis (Quadrantids) Meteor Shower

From: E. L. Jones <jonee_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:03 2004
Message-ID: <3FE67673.7060100_at_epix.net>

Wasn't Lost City a Prairie Fire Ball Network find with calculated
orbital data?

Elton

MexicoDoug_at_aol.com wrote:

> Ron, ¡¡ Boo !! as in as in Bootes (formerly somewhat known as Quadrans
> Muralis), not to pronounce like the "oo" of booties. The latest news
> on the Quadrantids' meteor shower radiating from Bootes. Sounds like
> there may have been some major booty shaking and perhaps
> disintegration of the parent body 2003 EH 1. I can't resist asking if
> anyone can correlate any Jan 3 or (Jan 4?) falls, or there about.
> This should be a fresh research question. Anne from Impactika.com has
> listed the following falls for that date:
> *
> Jan 2 (none)
>
> Jan 3
> 1877* Warrenton
> *1903* St. Mark's
> *1970* Lost City
>
> *Jan 4, 5 (none)
>
> *Saludos
> Doug Dawn
> Mexico
>
>
>
>
> http://leonid.arc.nasa.gov/IAUCircular2003Dec8.txt
>
>
> 2003 EH_1 AND THE QUADRANTIDS
> P. Jenniskens, NASA Ames Research Center, has pointed out that
> 2003 EH_1 (cf. MPEC 2003-E27) would seem to be a very strong
> candidate for the parent of the Quadrantid meteor stream. The
> later orbits, from arcs of up to 48 days (MPO 48330), indicate that
> frequent approaches within 0.2-0.3 AU of Jupiter occur, those
> during the past century or two evidently increasing q from just
> under 1 AU (with other orbital elements also very similar to those
> of the Quadrantids) to the present 1.19 AU. The current
> theoretical radiant for 2003 EH_1 (R.A. = 229.9 deg, Decl. = +49.6
> deg; V_inf = 41.7 km/s at solar longitude 282.94 deg, equinox
> 2000.0) is at the center of the Quadrantid radiants measured by
> photographic means, the narrow dispersion implying a young (about
> 500 years) shower age. From that dispersion, Jenniskens et al.
> (1997, Astron. Astrophys. 327, 1242) suspected that the parent was
> still among the meteoroids, hiding as a minor planet. On computing
> a parabolic orbit for C/1490 Y1, Hasegawa (1979, Publ. Astron. Soc.
> Japan 31, 257) introduced that comet as the likely Quadrantid
> parent. In attempting to link the 2003 observations to those of
> 1490-1491, Jenniskens, and also B. G. Marsden (Center for
> Astrophysics), have found that most of the potential solutions with
> the required Jan. 1491 perihelion date yield 0.5 < q < 0.6 AU in
> 1491, and this is probably too small to fit the data used by
> Hasegawa. Values in the more acceptable range of 0.7 < q < 0.8 AU
> (and 0.80 > e > 0.75) certainly arise for 1488 < T < 1494, however,
> the desired date being clearly attainable with the help also of a
> close approach to the earth or -- more likely -- the presence of
> nongravitational forces. Further light could be shed on the
> problem by the recognition of precovery and/or recovery
> observations of 2003 EH_1, which is presumably a comet and that
> should in any case be considered a high-priority object for further
> study.
>
> (C) Copyright 2003 CBAT
> 2003 December 8 (8252) Daniel W. E. Green
Received on Sun 21 Dec 2003 11:43:31 PM PST