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  • MPEC 2022-A112 : 2017 AH13

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    M.P.E.C. 2022-A112                              Issued 2022 January 9, 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
    
                                    2017 AH13                                
    
    
                               Revision to MPEC 2017-A59                            
    
    Additional Observations:
         K17A13H KC2022 01 07.51825215 21 42.24 +41 33 03.6          20.58GVEA112I52
         K17A13H KC2022 01 07.51961315 21 41.18 +41 33 11.4          20.86GVEA112I52
         K17A13H KC2022 01 07.52059515 21 40.39 +41 33 17.4          20.11GVEA112I52
         K17A13H KC2022 01 07.52157715 21 39.66 +41 33 22.8          20.82GVEA112I52
         K17A13H mC2022 01 08.50571915 08 11.57 +43 07 29.6          20.37GVEA112I52
         K17A13H mC2022 01 08.50899515 08 08.61 +43 07 48.2          19.89GVEA112I52
         K17A13H mC2022 01 08.51160215 08 06.27 +43 08 04.1          20.43GVEA112I52
         K17A13H mC2022 01 08.51184715 08 06.11 +43 08 05.5          20.57GVEA112I52
    
    Observer details:
    I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  Measurers
        E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
        H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
        Seaman, A. Serrrano, F. C. Shelly, K. W. Wierzchos.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    220107 I52 0.24+ 0.08+    220108 I52 0.23+ 0.10+    MPO403126   -0.04 days
    
    Orbital elements:
    2017 AH13                                                Earth MOID = 0.1292 AU
    Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
    M  53.18515              (2000.0)            P               Q                  
    n   0.78153640     Peri.   48.98381     +0.95653368     -0.07931524             
    a   1.1672662      Node   313.43978     -0.11418787     +0.78359728             
    e   0.5551054      Incl.   22.73620     +0.26833646     +0.61618536             
    P   1.26           H   21.38          G   0.15           U   0                  
    Residuals in seconds of arc
    170104 F51  0.2-  0.1+    170126 F51  0.1+  0.0     170216 807  0.2-  0.2-
    170104 F51  0.1-  0.2+    170126 F51  0.2+  0.1+    170216 807  0.0   0.2-
    170104 F51  0.0   0.1+    170126 F51  0.1+  0.1-    170216 807  0.0   0.2-
    170104 F51  0.1+  0.1+    170130 807  0.0   0.1+    170226 H21  0.4+  0.2-
    170106 926  0.5+  0.0     170130 807  0.1+  0.1-    170226 H21  0.2+  0.1+
    170106 926  0.1+  0.0     170130 807  0.1-  0.0     170226 H21  0.5+  0.2-
    170106 926  0.1+  0.1+    170130 691  0.2+  0.0     170305 807  0.3-  0.6+
    170107 291  0.1-  0.1+    170130 691  0.3-  0.2-    170305 807  0.2-  0.5+
    170107 291  0.1+  0.2+    170130 691  0.5+  0.2-    170305 807  0.1-  0.1+
    170107 291  0.2-  0.2+    170201 691  0.5-  0.3-    170316 F51  0.0   0.1+
    170107 691  0.8-  0.2-    170201 691  0.0   0.3-    170316 F51  0.0   0.1+
    170107 691  0.4-  0.6-    170201 691  0.2-  0.1+    170316 F51  0.3+  0.2-
    170107 691  0.8-  0.2+    170203 G96  0.1+  0.3+    170316 F51  0.1-  0.3-
    170108 H21  0.1+  0.0     170203 G96  0.4-  0.2-    220107 I52  0.3-  0.0
    170108 H21  0.1+  0.4+    170203 G96  0.0   0.2+    220107 I52  0.0   0.1-
    170108 H21  0.2+  0.3+    170203 G96  0.2-  0.3+    220107 I52  0.2-  0.0
    170123 926  0.1-  0.1+    170204 H21  0.0   0.1-    220107 I52  0.4+  0.3-
    170123 926  0.0   0.3-    170204 H21  0.3+  0.2-    220108 I52  0.6+  0.2+
    170123 926  0.3-  0.2+    170204 H21  0.2+  0.1+    220108 I52  0.1-  0.3-
    170123 474  0.4+  0.5+    170205 G96  0.4-  0.1-    220108 I52  0.4-  0.2+
    170123 474  0.1-  0.0     170205 G96  0.1-  0.1-    220108 I52  0.2+  0.2+
    170123 474  1.2-  0.0     170205 G96 (1.4-  0.6-)
    170126 F51  0.1+  0.1+    170205 G96  0.0   0.1+
    
    Ephemeris:
    2017 AH13                a,e,i = 1.17, 0.56, 23                  q = 0.5193
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 12 10    17 37 14.3 +10 13 56   0.4150  0.6811    33.9   126.2    24.0
    ...
    2021 12 25    16 58 20.7 +23 52 57   0.2716  0.8382    50.7   114.8    22.6
    ...
    2022 01 02    16 15 33.0 +33 17 19   0.2092  0.9222    67.1   100.9    21.5
    ...
    2022 01 08    15 15 15.8 +42 19 05   0.1714  0.9835    85.0    85.0    20.5
    2022 01 09    15 00 48.1 +43 54 24   0.1663  0.9935    88.7    81.7    20.3
    2022 01 10    14 44 37.3 +45 27 38   0.1616  1.0035    92.5    78.3    20.2
    ...
    2022 01 16    12 28 36.2 +51 17 06   0.1464  1.0621   118.9    54.2    19.3
    ...
    2022 01 24    09 29 33.2 +42 08 53   0.1678  1.1367   153.3    22.9    18.9
    ...
    2022 02 08    07 43 15.4 +21 54 51   0.3007  1.2652   154.9    19.3    20.3
    
    A. U. Tomatic                (C) Copyright 2022 MPC           M.P.E.C. 2022-A112
    


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