[Iaude] MPEC X19: 2021 QR [a=1.34,e=0.45,i=20.2,H=21.77]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun Dec 3 09:17:46 EST 2023


M.P.E.C. 2023-X19                              Issued 2023 December 3, 14:16 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets, routine data on comets and natural satellites,
         and occasional editorial announcements.  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

                                    2021 QR                                     


                           Revision to MPEC 2021-Q53                            

Additional Observations:
     K21Q00R  C2018 01 16.62130 11 40 34.564+63 40 15.50         21.6 wUEX019F51
     K21Q00R  C2018 01 16.63100 11 40 35.875+63 40 32.39         21.3 wUEX019F51
     K21Q00R  C2018 01 16.64066 11 40 37.133+63 40 49.14         21.7 wUEX019F51
     K21Q00R  C2018 01 16.65034 11 40 38.418+63 41 05.90         21.8 wUEX019F51
     K21Q00R &C2018 08 08.35131701 50 48.48 +18 43 37.8                WEX019W84
     K21Q00R &C2018 08 09.35205601 50 26.55 +19 02 55.6                WEX019W84

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
    Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling, M.
    Huber, E. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk.  1.8-m
    Ritchey-Chretien + CCD.
W84 Cerro Tololo-DECam.  Observers S. Benzvi, R. Demina.  Measurer S. Deen.
    4.0-m reflector + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
180116 F51 0.14+ 0.17+    180809 W84 0.02+ 0.02+    MPO782769   -0.04 days

Orbital elements:
2021 QR                                                  Earth MOID = 0.0745 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
M 181.30002              (2000.0)            P               Q                  
n   0.63557416     Peri.  243.60833     -0.71354838     +0.68983584             
a   1.3397545      Node   339.24664     -0.45368115     -0.58805911             
e   0.4539170      Incl.   20.20316     -0.53387464     -0.42227124             
P   1.55           H   21.77          G   0.15           U   2                  
Residuals in seconds of arc
180116 F51  0.1-  0.1-    210818 F51  0.1+  0.0     210822 F51  0.0   0.1+
180116 F51  0.1+  0.0     210819 L01  0.2+  0.0     210907 V06  0.0   0.4-
180116 F51  0.0   0.0     210819 L01  0.1+  0.4+    210907 V06  0.3+  0.1+
180116 F51  0.0   0.1+    210819 L01  0.4+  0.5-    210907 V06  0.1+  0.0
180808 W84  0.1-  0.2+    210819 L01  0.2-  0.8-    210907 V06  0.1-  0.1+
180809 W84  0.1+  0.0     210819 L01  0.3-  0.6-    210907 F51  0.1-  0.1+
210818 F51  0.1+  0.1-    210819 F51  0.2-  0.1+    210907 F51  0.2+  0.1-
210818 F51  0.0   0.0     210819 F51  0.2-  0.3+    210907 F51  0.0   0.0
210818 F51  0.1+  0.2-    210819 F51  0.1-  0.0     210928 291  0.4-  0.2+
210818 F51  0.1-  0.2-    210822 F51  0.4+  0.2-    210928 291  0.2-  0.3-
210818 F51  0.3-  0.1+    210822 F51  0.3+  0.0

Ephemeris:
2021 QR                  a,e,i = 1.34, 0.45, 20                  q = 0.7316
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 11 03    04 27 56.3 +58 17 18   1.0906  1.8979   131.3    23.1    24.4
...
2023 11 18    03 42 50.4 +60 22 16   1.0056  1.8655   138.6    20.5    24.2
...
2023 11 26    03 13 36.0 +60 11 13   0.9789  1.8449   139.6    20.3    24.1
...
2023 12 02    02 52 28.9 +59 23 15   0.9677  1.8278   138.6    20.9    24.0
2023 12 03    02 49 10.3 +59 12 10   0.9666  1.8249   138.3    21.0    24.0
2023 12 04    02 45 56.3 +59 00 17   0.9657  1.8219   138.0    21.2    24.0
...
2023 12 10    02 28 27.7 +57 33 52   0.9644  1.8030   135.3    22.6    24.1
...
2023 12 18    02 11 06.3 +55 09 20   0.9732  1.7759   130.3    25.0    24.1
...
2024 01 02    01 56 47.1 +50 10 52   1.0158  1.7184   118.5    30.2    24.3

A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-X19




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