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  • MPEC 2022-Q161 : 2021 QH2

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    Read MPEC 2022-Q160 Read MPEC 2022-Q162


    M.P.E.C. 2022-Q161                              Issued 2022 August 28, 14:10 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
    
                                    2021 QH2                                 
    
    
                               Revision to MPEC 2021-R03                            
    
    Additional Observations:
         K21Q02H  C2019 09 06.38026200 24 43.840+30 57 35.88         21.28GVEQ161F51
         K21Q02H  C2019 09 06.38888700 24 42.005+30 59 04.54         20.98GVEQ161F51
         K21Q02H  C2019 09 06.40610900 24 38.307+31 02 00.60         20.96GVEQ161F51
         K21Q02H  C2019 09 07.43964400 21 13.889+34 02 25.55         20.45GVEQ161F51
         K21Q02H  C2020 08 22.46450200 03 37.481-00 06 50.82         22.11GVEQ161F51
         K21Q02H  C2020 08 22.47694000 03 35.747-00 06 13.86         21.95GVEQ161F51
         K21Q02H  C2021 08 16.50826323 41 22.724-09 50 55.56         22.17GVEQ161F51
         K21Q02H  C2021 08 16.51948523 41 21.018-09 50 38.87         22.09GVEQ161F51
         K21Q02H  C2021 08 16.53069323 41 19.324-09 50 22.37         22.75GVEQ161F51
         K21Q02H  C2021 08 16.54195223 41 17.570-09 50 05.54         23.02GVEQ161F51
         K21Q02H  C2021 08 17.48047223 39 07.724-09 26 09.30         22.52GVEQ161F51
         K21Q02H  C2021 08 17.48661323 39 06.710-09 25 59.54         21.63GVEQ161F51
         K21Q02H  C2021 08 17.49274823 39 05.712-09 25 50.12         22.46GVEQ161F51
         K21Q02H  C2021 08 17.49885923 39 04.708-09 25 40.35         23.04GVEQ161F51
         K21Q02H  C2022 08 18.44222923 00 54.645-15 03 58.82         22.12GVEQ161F51
         K21Q02H  C2022 08 18.45469223 00 51.463-15 03 45.87         21.72GVEQ161F51
         K21Q02H  C2022 08 18.47965723 00 45.099-15 03 18.11         20.73GVEQ161F51
         K21Q02H  C2022 08 22.43514522 43 18.454-13 39 04.62         22.02GVEQ161F51
         K21Q02H  C2022 08 22.44761022 43 14.442-13 38 46.42         21.73GVEQ161F51
         K21Q02H  C2022 08 28.40443922 08 42.152-10 38 04.13         21.30wUEQ161F52
         K21Q02H  C2022 08 28.41792522 08 36.399-10 37 34.30         21.81wUEQ161F52
         K21Q02H  C2022 08 28.43141422 08 30.653-10 37 04.53         21.42wUEQ161F52
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
        Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M. Huber, Y.
        Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, I.
        Smith.  Measurers K. Chambers, S. Chastel, T. de Boer, J. Fairlamb, H.
        Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
        Weryk.  1.8-m Ritchey-Chretien + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    190906 F51 4.98- 2.50-    220828 F52 1.53- 0.96-    MPO646796   +0.17 days
    
    Orbital elements:
    2021 QH2                                                 Earth MOID = 0.0701 AU
    Epoch 2022 Aug. 9.0 TT = JDT 2459800.5                  Veres                   
    M 236.70014              (2000.0)            P               Q                  
    n   0.97969504     Peri.  132.73905     -0.28966706     -0.95384368             
    a   1.0040194      Node   333.78441     +0.81740452     -0.20347455             
    e   0.2850387      Incl.   10.33038     +0.49793859     -0.22086273             
    P   1.01           H   25.05          G   0.15           U   1                  
    Residuals in seconds of arc
    190906 F51  0.4-  0.4+    210817 F51  0.3+  0.1+    210831 033  0.2+  0.1+
    190906 F51  0.3-  0.5+    210830 F51  0.1+  0.0     210909 291  0.1+  0.2+
    190906 F51  0.1+  0.1-    210830 F51  0.1+  0.0     210909 291  0.1-  0.1+
    190907 F51  0.4-  0.6+    210830 F51  0.1+  0.2-    210909 291  0.2+  0.2+
    200822 F51  0.1-  0.1-    210830 F51  0.6+  0.3-    220818 F51  0.0   0.4+
    200822 F51  0.0   0.1-    210830 F51  0.3+  0.1-    220818 F51  0.2-  0.2-
    210816 F51  0.1-  0.1+    210830 F51  0.3+  0.0     220818 F51  0.3-  0.2+
    210816 F51  0.0   0.2+    210830 L01 (1.8+  1.1+)   220822 F51  0.2+  0.1-
    210816 F51  0.4+  0.0     210830 L01  0.5+  0.7+    220822 F51  0.2-  0.1-
    210816 F51  0.1-  0.0     210830 L01  1.0+  0.8+    220828 F52  0.0   0.2-
    210817 F51  0.0   0.0     210830 L01  0.1+  0.1+    220828 F52  0.1-  0.1-
    210817 F51  0.0   0.1+    210831 033  0.2+  0.3+    220828 F52  0.0   0.2-
    210817 F51  0.2+  0.1-    210831 033  0.1+  0.0
    
    Ephemeris:
    2021 QH2                 a,e,i = 1.00, 0.29, 10                  q = 0.7178
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2022 07 29    23 41 13.1 -18 40 44   0.2855  1.2348   135.3    35.3    24.2
    ...
    2022 08 13    23 18 40.0 -16 27 12   0.1981  1.1940   153.7    22.1    23.0
    ...
    2022 08 21    22 50 06.8 -14 11 55   0.1594  1.1679   167.5    10.8    22.1
    ...
    2022 08 27    22 17 45.8 -11 26 57   0.1359  1.1464   178.5     1.3    21.2
    2022 08 28    22 11 22.1 -10 52 13   0.1326  1.1426   176.5     3.1    21.3
    2022 08 29    22 04 41.2 -10 15 11   0.1294  1.1389   174.1     5.3    21.3
    ...
    2022 09 04    21 19 12.7 -05 43 13   0.1146  1.1153   157.3    20.4    21.6
    ...
    2022 09 12    20 10 05.3 +01 58 20   0.1070  1.0815   132.3    43.5    22.0
    ...
    2022 09 27    18 15 35.6 +14 37 55   0.1229  1.0121    91.0    82.1    23.4
    
    A. U. Tomatic                (C) Copyright 2022 MPC           M.P.E.C. 2022-Q161
    


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