MPEC 2002-E25 : COMETS C/1998 A2, 1998 A3, 2000 B8 (SOHO)

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M.P.E.C. 2002-E25                                Issued 2002 Mar.  9, 00:57 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

             Prepared using the Tamkin Foundation Computer Network

                              MPC@CFA.HARVARD.EDU
          URL http://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714

                   COMETS C/1998 A2, 1998 A3, 2000 B8 (SOHO)

Observations:
    CJ98A020  S1998 01 03.87985 18 54 30.0  -21 53 48                        249
    CJ98A020  s1998 01 03.87985 2 -0.00177615 -0.00939377 -0.00449789        249
    CJ98A020  S1998 01 03.88864 18 54 17.5  -21 52 41                        249
    CJ98A020  s1998 01 03.88864 2 -0.00177503 -0.00939371 -0.00449762        249
    CJ98A020  S1998 01 03.90153 18 53 59.2  -21 51 08                        249
    CJ98A020  s1998 01 03.90153 2 -0.00177340 -0.00939362 -0.00449723        249
    CJ98A020  S1998 01 03.92128 18 53 32.3  -21 48 44                        249
    CJ98A020  s1998 01 03.92128 2 -0.00177090 -0.00939348 -0.00449663        249
    CJ98A020  S1998 01 03.94312 18 53 02.8  -21 46 12                        249
    CJ98A020  s1998 01 03.94312 2 -0.00176813 -0.00939333 -0.00449596        249
    CJ98A020  S1998 01 03.98050 18 52 14.3  -21 41 57                        249
    CJ98A020  s1998 01 03.98050 2 -0.00176338 -0.00939306 -0.00449482        249
    CJ98A030  S1998 01 09.46408 19 19 53.6  -21 13 35                        249
    CJ98A030  s1998 01 09.46408 2 -0.00103004 -0.00932805 -0.00430825        249
    CJ98A030  S1998 01 09.49135 19 19 14.3  -21 10 30                        249
    CJ98A030  s1998 01 09.49135 2 -0.00102617 -0.00932762 -0.00430724        249
    CJ98A030  S1998 01 09.51108 19 18 45.5  -21 08 25                        249
    CJ98A030  s1998 01 09.51108 2 -0.00102338 -0.00932730 -0.00430650        249
    CJ98A030  S1998 01 09.54501 19 17 57.9  -21 05 04                        249
    CJ98A030  s1998 01 09.54501 2 -0.00101856 -0.00932676 -0.00430524        249
    CJ98A030  S1998 01 09.58062 19 17 08.8  -21 01 32                        249
    CJ98A030  s1998 01 09.58062 2 -0.00101351 -0.00932620 -0.00430392        249
    CJ98A030  S1998 01 09.60298 19 16 39.6  -20 59 34                        249
    CJ98A030  s1998 01 09.60298 2 -0.00101033 -0.00932584 -0.00430309        249
    CK00B080  S2000 01 16.70423 19 56 29.7  -19 58 46                        249
    CK00B080  s2000 01 16.70423 2 +0.00088826 -0.00835387 -0.00313056        249
    CK00B080  S2000 01 16.72923 19 55 58.2  -19 52 07                        249
    CK00B080  s2000 01 16.72923 2 +0.00089443 -0.00835208 -0.00312914        249
    CK00B080  S2000 01 16.74590 19 55 39.8  -19 47 25                        249
    CK00B080  s2000 01 16.74590 2 +0.00089854 -0.00835088 -0.00312820        249
    CK00B080  S2000 01 16.75423 19 55 30.1  -19 45 20                        249
    CK00B080  s2000 01 16.75423 2 +0.00090060 -0.00835029 -0.00312772        249
    CK00B080  S2000 01 16.77091 19 55 08.9  -19 40 43                        249
    CK00B080  s2000 01 16.77091 2 +0.00090471 -0.00834909 -0.00312678        249
    CK00B080  S2000 01 16.78756 19 54 47.9  -19 36 23                        249
    CK00B080  s2000 01 16.78756 2 +0.00090882 -0.00834789 -0.00312583        249
    CK00B080  S2000 01 16.81344 19 54 13.9  -19 30 06                        249
    CK00B080  s2000 01 16.81344 2 +0.00091521 -0.00834603 -0.00312436        249
    CK00B080  S2000 01 16.82923 19 53 53.5  -19 26 13                        249
    CK00B080  s2000 01 16.82923 2 +0.00091911 -0.00834489 -0.00312346        249
    CK00B080  S2000 01 16.83758 19 53 42.6  -19 24 26                        249
    CK00B080  s2000 01 16.83758 2 +0.00092117 -0.00834429 -0.00312298        249
    CK00B080  S2000 01 16.85424 19 53 23.1  -19 21 13                        249
    CK00B080  s2000 01 16.85424 2 +0.00092528 -0.00834309 -0.00312204        249
    CK00B080  S2000 01 16.88067 19 52 46.7  -19 15 58                        249
    CK00B080  s2000 01 16.88067 2 +0.00093181 -0.00834117 -0.00312053        249
    CK00B080  S2000 01 16.89590 19 52 27.3  -19 13 16                        249
    CK00B080  s2000 01 16.89590 2 +0.00093557 -0.00834007 -0.00311966        249

Observer details:
249 SOHO.  SOHO-LASCO coronagraph C2.  Comet detections by R. Kracht and
    M. Meyer, measurements by D. Hammer, reduction by B. G. Marsden.

Orbital elements:
Comet            T              q       e       Peri.    Node     Incl.     C
CJ98A020   1998 Jan.   3.74   0.0410   1.0      26.31    80.78    27.93     X
CJ98A030   1998 Jan.   9.30   0.0419   1.0      22.97    80.73    27.35     X
CK00B080   2000 Jan.  16.86   0.0340   1.0      54.63    75.09    70.75     X

     Meyer's discovery C/2000 B8 is a member of the Meyer group.  The other two
comets, detected by Kracht, are members of the Marsden group, objects that
could in fact have orbits differing significantly from the assumed parabolas.
Nevertheless, the objects clearly have orbits that pass rather close to that
of the earth (postperihelion), and D. A. J. Seargent has remarked on the
similarity to that of the Daytime Arietid meteor stream, with q = 0.09 AU and
L = 104, B = +10 (degrees, J2000.0; cf. MPEC 2002-E18).  Although q is still
larger, and there are substantial differences in the other orbital elements,
the L and B values are also similar to those of both comet 96P/Machholz 1 and
the Quadrantid meteor stream.

Brian G. Marsden             (C) Copyright 2002 MPC           M.P.E.C. 2002-E25

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