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  • MPEC 2005-H24 : COMETS C/1996 N3, 1997 J5, 1998 U7 (SOHO)

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    M.P.E.C. 2005-H24                                Issued 2005 Apr. 22, 22:25 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.
    
                      Supported in part by the Brinson Foundation
                 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/1996 N3, 1997 J5, 1998 U7 (SOHO)
    
    Observations:
        CJ96N030 2S1996 07 03.38330 06 44 46.5  +22 19 00                   EH024249
        CJ96N030 2s1996 07 03.38330 2 +0.00066154 +0.01055656 +0.00376688   EH024249
        CJ96N030 2S1996 07 03.48372 06 46 26.7  +22 48 23                   EH024249
        CJ96N030 2s1996 07 03.48372 2 +0.00065539 +0.01055573 +0.00376829   EH024249
        CJ96N030 2S1996 07 03.51454 06 46 59.8  +22 57 26                   EH024249
        CJ96N030 2s1996 07 03.51454 2 +0.00065350 +0.01055547 +0.00376873   EH024249
        CJ96N030 2S1996 07 03.60776 06 48 45.4  +23 24 44                   EH024249
        CJ96N030 2s1996 07 03.60776 2 +0.00064775 +0.01055470 +0.00377004   EH024249
        CJ96N030 2S1996 07 03.64637 06 49 31.8  +23 35 52                   EH024249
        CJ96N030 2s1996 07 03.64637 2 +0.00064536 +0.01055438 +0.00377059   EH024249
        CJ96N030 2S1996 07 03.67726 06 50 10.4  +23 44 33                   EH024249
        CJ96N030 2s1996 07 03.67726 2 +0.00064344 +0.01055412 +0.00377103   EH024249
        CJ96N030 3S1996 07 03.95437 06 56 25.1  +24 45 15                   EH024249
        CJ96N030 3s1996 07 03.95437 2 +0.00062608 +0.01055181 +0.00377497   EH024249
        CJ96N030 3S1996 07 03.98527 06 57 12.3  +24 48 52                   EH024249
        CJ96N030 3s1996 07 03.98527 2 +0.00062412 +0.01055156 +0.00377541   EH024249
        CJ96N030 3S1996 07 04.01614 06 57 51.6  +24 52 43                   EH024249
        CJ96N030 3s1996 07 04.01614 2 +0.00062216 +0.01055130 +0.00377586   EH024249
        CJ96N030 3S1996 07 04.04700 06 58 31.1  +24 55 28                   EH024249
        CJ96N030 3s1996 07 04.04700 2 +0.00062020 +0.01055104 +0.00377630   EH024249
        CJ96N030 3S1996 07 04.08302 06 59 19.9  +24 57 50                   EH024249
        CJ96N030 3s1996 07 04.08302 2 +0.00061791 +0.01055073 +0.00377682   EH024249
        CJ96N030 3S1996 07 04.10867 06 59 52.7  +24 58 55                   EH024249
        CJ96N030 3s1996 07 04.10867 2 +0.00061627 +0.01055052 +0.00377718   EH024249
        CJ96N030 3S1996 07 04.17547 07 01 11.0  +25 01 02                   EH024249
        CJ96N030 3s1996 07 04.17547 2 +0.00061200 +0.01054995 +0.00377815   EH024249
        CJ96N030 3S1996 07 04.20877 07 01 53.5  +25 01 20                   EH024249
        CJ96N030 3s1996 07 04.20877 2 +0.00060986 +0.01054967 +0.00377863   EH024249
        CJ96N030 3S1996 07 04.27098 07 03 02.6  +25 00 12                   EH024249
        CJ96N030 3s1996 07 04.27098 2 +0.00060586 +0.01054914 +0.00377952   EH024249
        CJ96N030 3S1996 07 04.30961 07 03 46.0  +25 00 00                   EH024249
        CJ96N030 3s1996 07 04.30961 2 +0.00060336 +0.01054882 +0.00378008   EH024249
        CJ96N030 3S1996 07 04.34050 07 04 17.2  +24 58 35                   EH024249
        CJ96N030 3s1996 07 04.34050 2 +0.00060136 +0.01054855 +0.00378053   EH024249
        CJ96N030 3S1996 07 04.37143 07 04 50.6  +24 57 33                   EH024249
        CJ96N030 3s1996 07 04.37143 2 +0.00059936 +0.01054829 +0.00378098   EH024249
        CJ97J050 3S1997 05 02.19660 02 48 47.0  +12 03 14                   EH024249
        CJ97J050 3s1997 05 02.19660 2 +0.00507040 +0.00912580 +0.00338858   EH024249
        CJ97J050 3S1997 05 02.26465 02 48 19.4  +12 10 22                   EH024249
        CJ97J050 3s1997 05 02.26465 2 +0.00506546 +0.00913111 +0.00338912   EH024249
        CJ97J050 3S1997 05 02.32715 02 47 52.9  +12 18 02                   EH024249
        CJ97J050 3s1997 05 02.32715 2 +0.00506092 +0.00913598 +0.00338961   EH024249
        CJ97J050 3S1997 05 02.37160 02 47 33.8  +12 22 58                   EH024249
        CJ97J050 3s1997 05 02.37160 2 +0.00505770 +0.00913943 +0.00338995   EH024249
        CJ97J050 3S1997 05 02.41951 02 47 10.4  +12 28 55                   EH024249
        CJ97J050 3s1997 05 02.41951 2 +0.00505422 +0.00914315 +0.00339032   EH024249
        CJ97J050 3S1997 05 02.46189 02 46 52.7  +12 34 04                   EH024249
        CJ97J050 3s1997 05 02.46189 2 +0.00505115 +0.00914643 +0.00339065   EH024249
        CJ97J050 3S1997 05 02.57720 02 46 01.1  +12 49 03                   EH024249
        CJ97J050 3s1997 05 02.57720 2 +0.00504278 +0.00915534 +0.00339153   EH024249
        CJ97J050 3S1997 05 02.62576 02 45 35.0  +12 55 56                   EH024249
        CJ97J050 3s1997 05 02.62576 2 +0.00503925 +0.00915908 +0.00339190   EH024249
        CJ97J050 3S1997 05 02.69673 02 45 01.3  +13 05 34                   EH024249
        CJ97J050 3s1997 05 02.69673 2 +0.00503410 +0.00916453 +0.00339243   EH024249
        CJ97J050 3S1997 05 02.75001 02 44 35.1  +13 12 46                   EH024249
        CJ97J050 3s1997 05 02.75001 2 +0.00503023 +0.00916862 +0.00339283   EH024249
        CJ98U070 3S1998 10 26.97932 13 53 24.8  -15 29 27                   EH024249
        CJ98U070 3s1998 10 26.97932 2 -0.00689342 -0.00756036 -0.00397684   EH024249
        CJ98U070 3S1998 10 27.02090 13 54 15.5  -15 23 22                   EH024249
        CJ98U070 3s1998 10 27.02090 2 -0.00689090 -0.00756224 -0.00397856   EH024249
        CJ98U070 3S1998 10 27.06381 13 55 09.7  -15 17 33                   EH024249
        CJ98U070 3s1998 10 27.06381 2 -0.00688830 -0.00756417 -0.00398032   EH024249
        CJ98U070 3S1998 10 27.10423 13 56 02.4  -15 12 16                   EH024249
        CJ98U070 3s1998 10 27.10423 2 -0.00688585 -0.00756599 -0.00398198   EH024249
        CJ98U070 3S1998 10 27.14590 13 56 57.8  -15 06 06                   EH024249
        CJ98U070 3s1998 10 27.14590 2 -0.00688333 -0.00756785 -0.00398369   EH024249
        CJ98U070 3S1998 10 27.18756 13 57 48.8  -14 59 45                   EH024249
        CJ98U070 3s1998 10 27.18756 2 -0.00688082 -0.00756970 -0.00398539   EH024249
        CJ98U070 3S1998 10 27.22923 13 58 47.2  -14 53 36                   EH024249
        CJ98U070 3s1998 10 27.22923 2 -0.00687830 -0.00757155 -0.00398709   EH024249
        CJ98U070 3S1998 10 27.27090 13 59 39.4  -14 46 47                   EH024249
        CJ98U070 3s1998 10 27.27090 2 -0.00687579 -0.00757339 -0.00398879   EH024249
        CJ98U070 3S1998 10 27.31375 14 00 40.2  -14 38 19                   EH024249
        CJ98U070 3s1998 10 27.31375 2 -0.00687322 -0.00757528 -0.00399053   EH024249
    
    Observer details:
    249 SOHO.  SOHO-LASCO coronagraphs C2 and C3.  Comet detections by R. Kracht
        and X. Leprette, measurements by K. Battams, reductions by B. G. Marsden.
    
    Orbital elements:
    Comet            T              q       e       Peri.    Node     Incl.     C
    CJ96N030   1996 July   3.85   0.0351   1.0      57.17    73.16    72.12     X
    CJ97J050   1997 May    3.36   0.0077   1.0      57.56   331.00   138.67     X
    CJ98U070   1998 Oct.  27.67   0.0067   1.0      48.66   316.22   131.34     X
    
         C/1996 N3 is a member of the Meyer group, whereas C/1997 J5 and C/1998 U7
    belong to the Kreutz group.
    
         Further to the statement at the end of MPEC 2005-G94, it should be noted
    that the best fit of C/2005 G2 to earlier comets is to C/1999 N5, the
    resulting orbital solution (using C2 observations alone, although the C3
    observations do not show any systematic departure above 1 arcmin) being as
    follows:
    
    Epoch 1999 July 1.0 TT = JDT 2451360.5
    T 1999 July 11.19490 TT                                 MPC
    q   0.0491952            (2000.0)            P               Q
    n   0.17125016     Peri.   22.12065     -0.20082361     -0.87351581
    a   3.2115552      Node    81.78500     +0.81825112     -0.39846583
    e   0.9846818      Incl.   26.61790     +0.53864179     +0.27963390
    P   5.76
    
    Epoch 2005 Apr. 20.0 TT = JDT 2453480.5
    T 2005 Apr. 14.25300 TT                                 MPC
    q   0.0492009            (2000.0)            P               Q
    n   0.17117101     Peri.   22.23192     -0.20027078     -0.87472552
    a   3.2125452      Node    81.62939     +0.81832607     -0.39702389
    e   0.9846848      Incl.   26.49073     +0.53873375     +0.27789800
    P   5.76
    Residuals in seconds of arc
    J997A  249  2.2+  2.5- Y  J997B  249  2.0-  0.1- Y  J997B  249  1.5+  0.5- Y
    J997A  249  4.3+  3.0- Y  J997B  249  1.8+  2.9- Y  J997B  249  4.1+  3.4- Y
    J997A  249  3.8-  1.2+ Y  J997B  249  4.7-  1.3+ Y  J997B  249  2.2+  1.7+ Y
    J997B  249(13.5+  6.6+)Y  J997B  249  0.6+  2.9- Y  K054D  249  1.0+ 14.0- Y
    J997B  249  1.3+  0.3- Y  J997B  249  2.4+  0.1+ Y  K054D  249  3.3-  9.5+ Y
    J997B  249  4.9+  0.4- Y  J997B  249  0.4+  3.1+ Y  K054D  249  1.9+ 10.3- Y
    J997B  249  2.6-  0.0  Y  J997B  249  0.6-  0.0  Y  K054D  249 (6.6+ 19.3-)Y
    J997B  249  1.7-  3.8+ Y  J997B  249  1.4+  3.7+ Y  K054D  249  1.1+  3.2+ Y
    J997B  249  2.8-  3.1+ Y  J997B  249  2.5+  1.7- Y  K054D  249  1.6-  2.2+ Y
    J997B  249  4.1-  2.4+ Y  J997B  249  3.1+  2.2- Y  K054D  249  4.8+  4.8+ Y
    J997B  249  0.7-  0.4+ Y  J997B  249  0.3+  0.3+ Y  K054D  249  1.1-  6.3- Y
    J997B  249  3.3-  4.5+ Y  J997B  249  3.0-  1.8- Y  K054D  249  2.0- 10.1+ Y
    
         On MPEC 2005-E87, C/1999 N5 was linked (with comparable residuals) to
    C/2005 E4.  It therefore seems plausible that C/2005 G2 separated from
    C/2005 E4 around the time of the C/1999 N5 perihelion passage, in much the
    same manner that C/1999 N5 may have separated from C/1999 J6 around a mutual
    Nov. 1993 perihelion passage.  If C/1999 P6 (cf. MPEC 2002-F43) also separated
    at that 1993 perihelion passage, it should return (if it has survived) within
    a few days of 2005 Apr. 28 (likewise for C/1999 P8 and P9 around 2005 May 18).
    
    Brian G. Marsden             (C) Copyright 2005 MPC           M.P.E.C. 2005-H24
    

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    MPEC number:

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