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Minor Planet Center

MPEC 2010-E38 : 2007 JZ20

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M.P.E.C. 2010-E38                                Issued 2010 Mar. 10, 16:37 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://www.minorplanetcenter.org/iau/mpc.html  ISSN 1523-6714

                                   2007 JZ20

                           Revision to MPEC 2007-J51

Additional Observations:
     K07J20Z  C2010 03 09.49053 15 44 11.67 -18 42 02.7          21.1 R EE038926
     K07J20Z  C2010 03 09.49534 15 44 12.08 -18 41 55.2          20.8 R EE038926
     K07J20Z  C2010 03 09.50014 15 44 12.48 -18 41 48.5          21.3 R EE038926
     K07J20Z  C2010 03 10.49404 15 45 37.88 -18 14 34.0          21.2 R EE038926
     K07J20Z  C2010 03 10.49884 15 45 38.25 -18 14 26.0          20.8 R EE038926
     K07J20Z  C2010 03 10.50365 15 45 38.69 -18 14 17.6          20.7 R EE038926
     K07J20Z  C2010 03 10.50845 15 45 39.07 -18 14 09.6          20.2 R EE038926

Observer details:
926 Tenagra II Observatory.  Observers P. R. Holvorcem, M. Schwartz.  Measurer
    P. R. Holvorcem.  0.81-m f/7 Ritchey-Chretien + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
100309 926  5.6-  2.0-    100310 926  5.5-  2.4-    MPO131968   +0.0022 day

Orbital elements:
2007 JZ20                                                Earth MOID = 0.0654 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M 210.82817              (2000.0)            P               Q
n   0.65625427     Peri.  139.00324     +0.88180322     +0.41306792
a   1.3114587      Node   200.52532     -0.35537457     +0.89922521
e   0.3354855      Incl.   40.47452     +0.31005161     -0.14411423
P   1.50           H   18.5           G   0.15           U   2
Residuals in seconds of arc
070511 704  0.9-  0.2-    070515 H45  1.3+  0.6-    070521 H45  1.1+  0.7-
070511 704  0.1-  1.0-    070515 H45  0.4-  1.1-    070521 H45  0.4+  0.3-
070511 704  0.6+  1.1+    070516 932  0.2-  0.1-    070521 H45  0.4+  0.5-
070511 704  0.3+  0.4+    070516 932  0.2-  0.1-    070521 H45  0.9+  0.4-
070512 704  0.1-  1.0-    070516 932  0.1-  0.1+    070524 H45  0.5-  0.0
070512 704  0.2+  0.4-    070516 734  0.2+  0.3-    070524 H45  1.5+  0.3+
070512 704  0.6+  0.1-    070516 734  0.0   0.3+    070524 H45  1.5+  0.1-
070512 704  0.6+  0.5+    070516 734  0.0   0.9+    070524 H45  1.0+  0.2+
070512 704  0.1+  0.4-    070516 734  0.2-  0.3+    070529 J95  0.1+  0.6+
070512 473 (3.0-  2.5+)   070516 734  0.1+  0.1-    070529 J95  0.1-  0.2+
070512 473  1.9-  1.8+    070517 A17  0.1+  0.1+    070529 J95  0.2-  0.3+
070512 473  2.0-  2.5+    070517 A17  0.2+  0.1+    070608 H36  2.2-  0.0
070512 B03  0.3-  0.1+    070517 A17  0.1-  0.0     070608 H36  1.7-  0.5+
070512 B03  0.4-  0.1-    070518 649  0.6-  0.2+    070608 H36  0.3+  1.5+
070512 B03  0.0   0.2-    070518 649  0.3+  0.0     070615 649  0.2-  1.8-
070512 B03  0.2-  0.3+    070518 649  0.3-  0.1-    070615 649  0.5+  0.4-
070512 B03  0.1-  0.3-    070518 649  0.2-  0.3+    070615 649  0.1+  1.5+
070512 B03  0.1-  0.2-    070518 649  0.0   0.1+    070615 649  0.4-  0.2-
070512 A17  0.3-  0.1+    070518 H45  0.3+  0.7-    070617 H55  0.1-  0.1-
070512 A17  0.1-  0.0     070518 H45  0.4+  0.8-    070617 H55  0.6-  0.1+
070512 A17  0.1-  0.0     070518 H45  0.2+  0.8-    070617 H55  0.1-  0.4+
070513 213  0.5-  0.5+    070518 H45  0.4+  0.8-    070617 H55  0.5-  0.5-
070513 213  0.5-  0.1+    070518 H45  0.0   0.6-    070617 H55  0.1-  0.1+
070513 213  0.2-  0.0     070518 H45  0.1+  0.7-    070707 J95  0.3+  1.0+
070513 704  0.1-  0.1+    070518 H45  0.3+  0.9-    070707 J95  0.5+  0.1+
070513 704  0.3+  0.3+    070518 A17  0.2-  0.0     070707 J95  0.2-  0.1+
070513 704  0.3+  0.4+    070518 A17  0.1+  0.2-    070707 J95  0.2-  0.0
070513 704  0.3-  0.5-    070518 A17  0.1-  0.0     070811 A17  0.4-  0.2+
070513 704  0.1+  0.2-    070519 176  0.4-  0.1+    070812 A17  1.7+  0.6+
070513 473  0.6-  0.3-    070519 176  0.3-  0.0     070812 A17  0.5+  0.6+
070513 473  0.6-  0.1-    070519 176  0.4-  0.2+    070914 448  0.4+  0.8-
070513 473  0.9-  0.0     070519 176  0.5-  0.2-    070914 448  0.1+  0.6+
070514 649  0.1-  0.5+    070519 176  0.2-  0.1-    070914 448  0.3+  0.0
070514 649  0.0   0.9+    070519 176  0.1-  0.1-    080111 413  0.1+  0.1+
070514 649  0.2+  0.2+    070519 147  0.1+  0.3-    080111 413  0.0   0.1-
070514 704  0.5+  0.1-    070519 147  0.2+  0.7-    080114 413  0.6+  0.0
070514 704  0.6+  0.1-    070519 147  0.1-  1.1-    080114 413  0.0   0.1+
070514 704  0.1-  0.6+    070519 H45  0.6+  0.7-    100309 926  0.1-  0.4+
070514 704  0.0   0.2-    070519 H45  0.1+  0.8-    100309 926  0.1+  0.2+
070515 H45  0.7+  0.4-    070519 H45  0.3+  0.0     100309 926  0.1+  0.9-
070515 H45  0.2-  0.5-    070519 H45  0.0   0.3-    100310 926  0.1-  0.2-
070515 H45  0.6+  0.1+    070519 H45  0.3+  0.8-    100310 926  0.4-  0.2-
070515 H45  0.0   0.4+    070519 H45  0.8+  0.1-    100310 926  0.3+  0.1+
070515 H45  0.2+  0.4+    070521 H45  0.7+  0.1-    100310 926  0.1+  0.1+
070515 H45  0.8+  1.0-    070521 H45  0.2+  0.8-

Ephemeris:
2007 JZ20                a,e,i = 1.31, 0.34, 40                  q = 0.8715
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2010 03 05    15 37.54   -20 32.6    0.954    1.567   107.2    37.2    20.9
2010 03 15    15 51.84   -15 57.2    0.819    1.531   114.8    36.1    20.5
2010 03 25    16 03.95   -09 17.9    0.696    1.492   122.6    34.3    20.0
2010 04 04    16 13.30   +00 03.4    0.593    1.450   129.3    32.2    19.5
2010 04 14    16 19.08   +12 26.4    0.519    1.405   132.3    31.8    19.2
2010 04 24    16 20.34   +27 02.3    0.481    1.358   128.5    35.4    19.0
2010 05 04    16 16.17   +41 36.2    0.481    1.309   118.7    42.5    19.1
2010 05 14    16 05.58   +53 53.6    0.509    1.257   107.0    50.2    19.4
2010 05 24    15 48.01   +63 05.3    0.552    1.205    96.2    56.7    19.7
2010 06 03    15 23.54   +69 36.0    0.599    1.151    87.1    61.6    19.9

Sonia Keys                   (C) Copyright 2010 MPC           M.P.E.C. 2010-E38

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