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  • MPEC 2020-L08 : 2017 QB2

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    M.P.E.C. 2020-L08                                  Issued 2020 June 2, 15:00 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets and routine data on comets.  They are published
        on behalf of Division F 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 https://www.minorplanetcenter.net/    ISSN 1523-6714
    
                                    2017 QB2                                 
    
    
                               Revision to MPEC 2017-Q63                            
    
    Additional Observations:
         K17Q02B  C2019 10 25.51586308 01 23.499+59 30 57.70         23.90GVEL008T12
         K17Q02B  C2019 10 25.52676008 01 28.154+59 31 07.88         23.80GVEL008T12
         K17Q02B  C2019 10 25.53785008 01 32.920+59 31 18.36         23.81GVEL008T12
         K17Q02B KC2019 11 21.64263111 41 26.409+55 14 03.90         23.77GVEL008T12
    
    Observer details:
    T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observers D. Fohring, M.-T.
        Hui.  Measurer D. J. Tholen.  2.24-m f/10.1 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    191025 T12 21.7- 41.0-    191121 T12 14.2- 69.9-    MPO416580   -0.01 days
    
    Orbital elements:
    2017 QB2                                                 Earth MOID = 0.0533 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M  99.46407              (2000.0)            P               Q
    n   1.02691987     Peri.  218.34811     -0.99499683     +0.02733636
    a   0.9729974      Node   322.87232     +0.02553778     -0.86029227
    e   0.1583963      Incl.    9.16064     -0.09658743     -0.50906771
    P   0.96           H   24.4           G   0.15           U   3
    Residuals in seconds of arc
    170816 F51  0.4-  0.2+    170820 H21  0.1+  0.0     170827 G58  0.5-  0.2+
    170816 F51  0.3-  0.1+    170820 H21  0.2+  0.3-    170921 H21  0.3-  0.0
    170816 F51  0.2-  0.1+    170823 H21  0.1+  0.2+    170921 H21  0.2-  0.2-
    170816 F51  0.2-  0.2+    170823 H21  0.4-  0.3-    170921 H21  0.6-  0.1+
    170817 568  0.2-  0.0     170823 H21  0.0   0.4+    191025 T12  0.1+  0.1+
    170817 568  0.2-  0.0     170825 H21  0.3-  0.5-    191025 T12  0.1-  0.1-
    170817 568  0.2-  0.0     170825 H21  0.2-  0.2-    191025 T12  0.1+  0.0
    170820 J95  1.0+  0.1-    170825 H21  0.6-  0.9-    191121 T12  0.0   0.0
    170820 J95  0.7+  0.2-    170827 G58  0.2-  0.3-
    170820 H21  0.2-  0.3-    170827 G58  0.0   0.2-
    
    Ephemeris:
    2017 QB2                 a,e,i = 0.97, 0.16, 9                   q = 0.8189
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 05 03    23 04 20.9 -15 21 47   0.7962  0.9453    61.9    70.1    26.2
    ...
    2020 05 18    23 46 16.3 -08 44 51   0.8247  0.9868    64.1    67.2    26.3
    ...
    2020 05 26    00 07 38.6 -05 09 53   0.8323  1.0081    65.4    66.0    26.3
    ...
    2020 06 01    00 23 21.9 -02 28 22   0.8347  1.0233    66.4    65.2    26.4
    2020 06 02    00 25 57.9 -02 01 28   0.8348  1.0258    66.6    65.1    26.4
    2020 06 03    00 28 33.8 -01 34 33   0.8349  1.0283    66.7    65.0    26.4
    ...
    2020 06 09    00 44 04.9 +01 06 41   0.8338  1.0425    67.8    64.4    26.4
    ...
    2020 06 17    01 04 42.0 +04 40 45   0.8284  1.0601    69.3    63.7    26.4
    ...
    2020 07 02    01 43 37.7 +11 16 46   0.8075  1.0882    72.2    62.8    26.4
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-L08
    


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