[Iaude] MPEC Q80: 2016 QA84 [a=1.21,e=0.28,i=32.7,H=22.2]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2020-Q80                               Issued 2020 August 18, 22:04 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 at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                   2016 QA84                                    


                           Revision to MPEC 2016-R40                            

Additional Observations:
     K16Q84A KC2012 08 25.35877222 16 05.720+00 17 27.71         20.24GVEQ080F51
     K16Q84A  C2012 08 26.46108222 14 03.873-01 08 07.71         21.12GVEQ080F51
     K16Q84A  C2012 08 26.47192422 14 02.611-01 08 57.85         21.25GVEQ080F51
     K16Q84A  C2020 08 18.33941421 53 24.608+12 02 24.14         22.00wUEQ080F51
     K16Q84A  C2020 08 18.35050221 53 23.293+12 01 29.73         21.74wUEQ080F51
     K16Q84A  C2020 08 18.37280221 53 20.615+11 59 40.32         22.01wUEQ080F51

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
    Wainscoat, R. Weryk, K. Chambers, T. de Boer, L. Denneau, J. Fairlamb, H.
    Flewelling, C.-C. Lin, E. Magnier.  1.8-m Ritchey-Chretien + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
120825 F51   13+    3+    200818 F51   13+    3+    MPO389342   -7.23 days

Orbital elements:
2016 QA84                                                Earth MOID = 0.0748 AU
Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
M  43.36696              (2000.0)            P               Q
n   0.73781152     Peri.   37.98839     -0.92509542     +0.32087633
a   1.2129394      Node   157.91095     -0.30070053     -0.94558521
e   0.2827563      Incl.   32.68420     +0.23190010     +0.05391653
P   1.34           H   22.2           G   0.15           U   4
Residuals in seconds of arc
120825 F51  0.1+  0.3+    160831 291  0.1+  0.2+    160905 291  0.3+  0.5+
120826 F51  0.1-  0.2-    160902 H21  0.2+  0.1-    160905 291  0.3+  0.0
120826 F51  0.0   0.1-    160902 H21  0.1+  0.1-    160905 291  0.0   0.1+
160830 F51  0.2+  0.2+    160902 H21  0.0   0.2+    160905 H21  0.1-  0.1-
160830 F51  0.0   0.2-    160902 H21  0.3-  0.5+    160905 H21  0.1-  0.0
160830 F51  0.1+  0.3-    160903 291  0.9-  0.0     160905 H21  0.2-  0.2-
160831 H21  0.4+  0.2+    160903 291  0.8-  0.0     160905 H21  0.5-  0.1-
160831 H21  0.3+  0.3+    160903 291  0.3-  0.3-    200818 F51  0.1-  0.0
160831 291  0.2-  0.1+    160904 291  0.2+  0.1-    200818 F51  0.0   0.0
160831 H21  0.4+  0.3+    160904 291  0.3+  0.1+    200818 F51  0.0   0.0
160831 291  0.1+  0.7+    160904 291  0.1-  0.3-

Ephemeris:
2016 QA84                a,e,i = 1.21, 0.28, 33                  q = 0.8700
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 07 19    22 42 29.2 +40 52 55   0.4842  1.2466   106.9    51.2    23.0
...
2020 08 03    22 21 54.0 +30 14 24   0.4125  1.3083   127.7    37.9    22.4
...
2020 08 11    22 07 19.4 +21 35 03   0.3874  1.3389   141.6    28.0    22.0
...
2020 08 17    21 55 54.5 +13 51 41   0.3796  1.3608   152.6    20.0    21.8
2020 08 18    21 54 01.8 +12 30 19   0.3795  1.3643   154.4    18.7    21.7
2020 08 19    21 52 10.3 +11 08 15   0.3797  1.3678   156.1    17.5    21.7
...
2020 08 25    21 41 36.1 +02 52 10   0.3885  1.3882   163.9    11.6    21.6
...
2020 09 02    21 29 55.2 -07 25 07   0.4205  1.4138   161.4    13.2    21.8
...
2020 09 17    21 18 01.7 -21 31 04   0.5320  1.4563   140.7    25.9    22.8

A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-Q80