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Re: (meteorobs) Hermes and Eta Cetids

----- Original Message -----
From: "Roberto G." <md6648@mclinkdot it>


> 1937 UB (HERMES) it's rediscovered!!!
>
> http://cfa-www.harvarddot edu/mpec/K03/K03T74.html
>
> Warning! This it's a very good occasion for confirm or not
> the link with the Eta Cetids around 25th October
> (the Moon it's New!).
> Roberto Gorelli
>

Hi Roberto a.o.,

Using the preliminary orbit from MPEC 2003-T74, the theoretical radiant
would be that below (calculated with the software of Neslusan et al.,
Astron. Astroph. 331 (1998), 411-413). Miss-distance for November 1.5 is
0.007 AU. Given the radiant location any meteors, if there are, will be
difficult to discern from
Taurids. The much lower speed is the only handle. Please note that with such
a low v_geo the radiant is very diffuse (20-30 degrees diameter).

Cheers,

- Marco


           EQUINOX: 2000.0;       DATA FOR YEAR: 2003
--------------------------------------------------------------------
METH.  ALPHA  DELTA    VG      VH        L     DATE-MAX.    D-DISC.
 -Q     37.4    4.6   18.69   35.02    214.5   OCT. 28.4     .026
 -B     37.4    4.5   18.42   34.87    214.5   OCT. 28.4     .024
 -W     35.6    3.6   18.31   35.35    214.5   OCT. 28.4     .043
 -A     39.4    4.9   18.32   35.38    218.6   NOV.  1.5     .007
 -H     39.4    4.9   18.32   35.38    218.5   NOV.  1.4     .007
 -P     39.1    5.2   18.31   35.38    218.4   NOV.  1.3     .008
 Q+     29.6   22.9   18.11   35.20     34.5   APR. 25.2     .014
 B+     29.6   22.8   18.23   35.27     34.5   APR. 25.2     .013
 W+     28.6   22.3   18.31   35.04     34.5   APR. 25.2     .022
 A+     30.7   23.0   18.31   35.03     36.6   APR. 27.3     .004
 H+     30.7   23.0   18.31   35.03     36.6   APR. 27.3     .004
 P+     30.5   23.2   18.32   35.03     36.5   APR. 27.2     .004
--------------------------------------------------------------------
FIRST/SECOND (-/+) SET OF DATA CONCERNS THE PRE-/POST-PERIHELION ARC
THE BEST METHOD - PRE-PERIHELION ARC:  H     (D =  .007)
                - POST-PERIHELION ARC: H     (D =  .004)

----------
Dr Marco Langbroek

marco.langbroek@wanadoodot nl
meteorites@dmsweb.org
http://home.wanadoodot nl/marco.langbroek

"What seest thou else
 In the dark backward and abysm of time?"

                            William Shakespeare
                            The Tempest act I scene 2
----------


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