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  • MPEC 2022-D74 : 2021 GP16

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    M.P.E.C. 2022-D74                             Issued 2022 February 26, 14:09 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 GP16                                
    
    
                               Revision to MPEC 2021-H29                            
    
    Additional Observations:
         K21G16P |C2022 02 25.09901 09 59 25.56 -29 34 02.8          21.8 GVED074807
         K21G16P |C2022 02 25.10456 09 59 24.65 -29 33 57.0          21.4 GVED074807
         K21G16P |C2022 02 25.11010 09 59 23.74 -29 33 51.6          21.6 GVED074807
         K21G16P  C2022 02 25.33040909 58 49.576-29 30 11.90         22.24GVED074T14
         K21G16P  C2022 02 25.33138509 58 49.419-29 30 10.94         22.06GVED074T14
         K21G16P  C2022 02 25.33236409 58 49.255-29 30 09.92         22.12GVED074T14
         K21G16P |C2022 02 26.08113 09 56 52.37 -29 16 08.3          21.8 GVED074807
         K21G16P |C2022 02 26.08483 09 56 51.71 -29 16 04.6          21.4 GVED074807
         K21G16P |C2022 02 26.08853 09 56 51.12 -29 16 00.5          21.6 GVED074807
    
    Observer details:
    807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes, L.
        Horn.  1.00-m f/10.0 astrograph + CCD.
    T14 Mauna Kea-UH/Tholen NEO Follow-Up (CFHT).  Observer C. Cunningham.
        Measurer D. J. Tholen.  3.6-m f/4.1 reflector + MegaCam.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    220225 807 0.17+ 0.05+    220226 807 0.17+ 0.05+    MPO622488   -0.03 days
    
    Orbital elements:
    2021 GP16                                           PHA, Earth MOID = 0.0388 AU
    Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
    M 179.29932              (2000.0)            P               Q                  
    n   0.90707583     Peri.  110.60897     +0.75185545     +0.64679969             
    a   1.0569156      Node   209.53536     -0.65899421     +0.73102293             
    e   0.3166013      Incl.   15.04001     -0.02097672     +0.21738360             
    P   1.09           H   21.96          G   0.15           U   2                  
    Residuals in seconds of arc
    210415 T08  0.4+  0.0     210419 474  0.1-  0.1+    210424 I52  0.1-  0.2+
    210415 T08  0.1-  0.1-    210419 474  0.0   0.1-    210424 I52  0.1-  0.1+
    210415 T08  0.2-  0.5-    210420 033  0.0   0.1+    210424 I52  0.2+  0.1+
    210415 T08  0.1-  0.3+    210420 033  0.1+  0.3+    210424 I52  0.2+  0.1+
    210416 L01  0.2-  0.2+    210420 033  0.0   0.2+    210424 T08  0.2+  0.2+
    210416 L01  0.2-  0.2+    210420 I52  0.0   0.0     210424 T08  0.1+  0.2-
    210416 L01  0.1-  0.3+    210420 I52  0.1+  0.0     210424 T08  0.2+  0.0
    210416 L01  0.1-  0.3+    210420 I52  0.1-  0.2-    210425 K87  1.1-  0.7-
    210416 L01  0.0   0.1+    210420 I52  0.1-  0.0     210425 K87  1.2-  1.0-
    210416 I93  0.1+  0.1-    210420 T08  0.2+  0.0     210425 K87  0.3-  1.1-
    210416 I93  0.1+  0.2+    210420 T08  0.1-  0.0     210425 I52  0.6-  0.4-
    210416 I93  0.0   0.1-    210420 T08  0.1-  0.1-    210425 I52  0.1-  0.0
    210416 807  0.1-  0.0     210420 T08  0.1+  0.1-    210425 I52  0.2+  0.1+
    210416 807  0.2-  0.0     210421 033  0.0   0.2+    210425 I52  0.3-  0.1+
    210416 807  0.1-  0.1-    210421 033  0.0   0.3+    210425 T08  0.6-  0.6-
    210416 474  0.0   0.1-    210421 033  0.0   0.2+    210425 T08  0.4-  0.4-
    210416 474  0.1+  0.1-    210422 T05  0.1+  0.1+    210425 T08  0.6+  0.8+
    210416 474  0.0   0.1-    210422 T05  0.2-  0.1-    210425 T08  0.0   0.3-
    210417 595  0.6-  0.7+    210422 T05  0.2-  0.1-    210426 K87  0.7-  0.1+
    210417 J95  0.2-  0.4+    210422 T05  0.1-  0.1-    210426 K87  0.6-  0.4-
    210417 595  0.5-  0.1+    210423 160  0.4-  0.5-    210426 K87  0.6-  0.0
    210417 Y00  0.2-  0.7+    210423 160  0.1+  0.3-    210426 033  0.1+  0.2+
    210417 Y00  0.3-  0.4+    210423 160  0.1+  0.3-    210426 033  0.1+  0.3+
    210417 Y00  0.0   0.0     210423 A17  0.0   0.2-    210426 033  0.2+  0.3+
    210417 Y00  0.0   0.1-    210423 A17  0.1+  0.1-    210426 033  0.1+  0.0
    210417 Y00  0.1-  0.0     210423 A17  0.1-  0.2+    210427 033  0.2-  0.1+
    210417 J95  0.2+  0.3-    210423 J95  0.1-  0.0     210427 033  0.1+  0.1+
    210417 J95  0.0   0.1-    210423 J95  0.0   0.1+    210427 033  0.2+  0.1+
    210417 J95  0.1-  0.3+    210423 K87  0.6-  0.4-    210427 033  0.3-  0.0
    210417 204  0.3+  0.2+    210423 J95  0.0   0.1+    210427 033  0.1+  0.0
    210417 J95  0.3-  0.0     210423 K87  0.8-  0.3+    210427 L18  0.7-  0.7+
    210417 204  0.2-  0.3+    210423 K87  0.5-  0.0     210427 033  0.3+  0.4+
    210417 X31  0.5-  0.0     210423 130  0.1+  0.0     210427 033  0.3+  0.2+
    210417 X31  0.2-  0.2+    210423 J95  0.0   0.1-    210427 033  0.3+  0.2+
    210417 X31  0.3+  0.1-    210423 130  0.3+  0.1+    210427 L18  0.2+  0.1+
    210417 204  0.1-  0.2+    210423 130  0.2+  0.1+    210427 L18  1.0+  0.5-
    210417 T05  0.1-  0.2-    210423 033  0.0   0.1+    210428 033  0.3+  0.2+
    210417 I52  0.1-  0.0     210423 033  0.1+  0.1+    210428 033  0.0   0.1+
    210417 I52  0.1+  0.2+    210423 033  0.1+  0.1+    210428 033  0.1+  0.2+
    210417 I52  0.1+  0.2+    210423 I52  0.0   0.0     210428 033  0.2+  0.2+
    210417 T05  0.1+  0.3+    210423 I52  0.0   0.0     210428 033  0.2+  0.3+
    210417 T05  0.2-  0.2-    210423 I52  0.0   0.1-    210501 I52  0.0   0.3+
    210417 T05  0.1-  0.2-    210423 L18  0.5-  0.4-    210501 I52  0.0   0.3-
    210418 T05  0.2+  0.3+    210423 L18  0.9-  1.1-    210501 I52  0.1+  0.0
    210418 T05  0.0   0.1-    210423 L18 (0.9-  1.5-)   220225 807  0.1-  0.1+
    210418 T05  0.0   0.2+    210423 C47  0.0   0.2-    220225 807  0.2-  0.1+
    210419 I52  0.4-  0.6-    210423 C47  0.2+  0.0     220225 807  0.2-  0.2-
    210419 I52  0.2-  0.2-    210423 C47  0.1+  0.2+    220225 T14  0.0   0.0
    210419 I52  0.2+  0.1+    210423 033  0.2+  0.2+    220225 T14  0.0   0.0
    210419 T08  0.0   0.4-    210423 033  0.2-  0.3-    220225 T14  0.0   0.0
    210419 T08  0.5+  0.3+    210423 033  0.1+  0.2+    220226 807  0.3+  0.4+
    210419 T08  0.2+  0.1-    210424 W88  0.4+  0.4-    220226 807  0.4-  0.0
    210419 T08  0.1-  0.1-    210424 W88  0.1+  0.1-    220226 807  0.2-  0.0
    210419 474  0.2+  0.1-    210424 W88  0.0   0.2+
    
    Ephemeris:
    2021 GP16                a,e,i = 1.06, 0.32, 15                  q = 0.7223
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2022 01 27    10 54 46.3 -29 58 15   0.5975  1.3909   121.1    37.3    23.1
    ...
    2022 02 11    10 32 41.7 -31 32 53   0.5086  1.3816   132.4    31.9    22.5
    ...
    2022 02 19    10 14 50.5 -30 56 00   0.4698  1.3723   137.6    29.1    22.3
    ...
    2022 02 25    09 59 40.5 -29 35 49   0.4459  1.3632   140.4    27.6    22.1
    2022 02 26    09 57 04.4 -29 17 43   0.4424  1.3615   140.7    27.4    22.1
    2022 02 27    09 54 27.9 -28 58 15   0.4391  1.3598   141.0    27.3    22.1
    ...
    2022 03 05    09 38 59.3 -26 33 13   0.4224  1.3484   141.6    27.2    22.0
    ...
    2022 03 13    09 20 17.3 -22 13 09   0.4090  1.3306   139.2    29.2    21.9
    ...
    2022 03 28    08 56 56.1 -12 10 06   0.4096  1.2890   127.5    37.9    22.1
    
    A. U. Tomatic                (C) Copyright 2022 MPC           M.P.E.C. 2022-D74
    


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