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  • MPEC 2018-Q99 : 2017 ER22

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    M.P.E.C. 2018-Q99                                Issued 2018 Aug. 30, 19:35 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 ER22
    
                               Revision to MPEC 2017-F07
    
    Additional Observations:
         K17E22R KC2018 08 03.62755801 15 50.738-50 15 29.13         21.43GVEQ099T12
         K17E22R KC2018 08 07.62236401 23 14.784-51 49 39.70         21.29GVEQ099T12
    
    Observer details:
    T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observers D. Fohring, D. Hung.
        Measurer D. J. Tholen.  2.24-m f/10.1 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    180803 T12 25.4+ 22.6+    180807 T12 26.8+ 23.9+    MPO411585   -0.011 day
    
    Orbital elements:
    2017 ER22                                                Earth MOID = 0.1268 AU
    Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
    M 226.68057              (2000.0)            P               Q
    n   0.51053396     Peri.   25.47328     +0.15372488     -0.92711711
    a   1.5504328      Node    57.48472     +0.82301235     -0.07128972
    e   0.4654224      Incl.   23.91176     +0.54682660     +0.36792884
    P   1.93           H   19.5           G   0.15           U   3
    Residuals in seconds of arc
    170313 F51  0.2-  0.2-    170316 K51  0.1-  0.2+    170403 F51  0.0   0.1+
    170313 F51  0.0   0.1-    170316 K51  0.2-  0.2+    170407 705  0.9-  0.3-
    170313 F51  0.1-  0.1-    170316 K51  0.1-  0.2+    170407 705  0.3-  0.1+
    170313 104  0.1+  0.1+    170316 C47  0.1+  0.5-    170407 926  0.3+  0.1+
    170313 104  0.2-  0.3-    170316 C47  0.1+  0.6-    170407 926  0.3+  0.9+
    170313 104  0.0   0.5-    170316 C47  0.0   0.5-    170411 705  0.2-  0.1-
    170314 926 (0.1+  1.9-)   170316 C47  0.2+  0.4-    170411 705  0.1-  0.1-
    170314 926  0.2-  0.2+    170317 291  0.2+  0.4+    170411 705  0.1+  0.0
    170314 926  0.4-  0.1+    170317 291  0.2-  0.2+    170419 H21  0.2-  0.6-
    170315 291  0.2+  0.2+    170317 291  0.0   0.2+    170419 H21  0.4+  0.4-
    170315 291  0.1-  0.4+    170317 926  0.3+  0.6-    170419 H21  0.7+  0.2-
    170315 291  0.1-  0.4+    170317 926  0.3+  0.3-    170426 G96  0.7-  0.6-
    170315 H21  0.2-  0.1-    170317 926  0.2-  0.3-    170426 G96  0.1+  1.1-
    170315 H21  0.1-  0.3-    170321 926  0.6+  0.6+    170426 G96  0.4+  0.4-
    170315 H21  0.2-  0.3-    170321 926  0.3+  0.1-    170426 G96  0.1-  0.0
    170315 I52  0.0   0.3-    170321 926  0.1+  0.0     170503 I52  0.6+  0.2-
    170315 I52  0.1-  0.4-    170403 I52  0.2-  0.4+    170503 I52  0.1+  0.5+
    170315 I52  0.3+  0.2-    170403 I52  0.1-  0.0     170503 I52  0.2+  0.3-
    170316 291  0.0   0.2+    170403 I52  0.1-  0.2+    170503 I52  0.2+  0.1-
    170316 291  0.0   0.2+    170403 I52  0.5+  0.2+    170531 291  0.5-  0.6+
    170316 587  0.0   0.3-    170403 F51  0.1+  0.1+    170531 291  0.6+  0.3-
    170316 587  0.6-  0.7-    170403 F51  0.0   0.1+    180803 T12  0.1+  0.1-
    170316 587  0.4+  0.8-    170403 F51  0.0   0.1-    180807 T12  0.1+  0.1-
    
    Ephemeris:
    2017 ER22                a,e,i = 1.55, 0.47, 24                  q = 0.8288
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 07 31    01 08 56.9 -48 53 23   0.8374  1.5953   118.6    34.0    21.5
    ...
    2018 08 15    01 36 10.6 -54 52 51   0.7198  1.4987   118.8    36.3    21.1
    ...
    2018 08 23    01 48 41.6 -58 22 05   0.6652  1.4448   117.6    38.4    20.9
    ...
    2018 08 29    01 56 37.4 -61 03 26   0.6272  1.4035   116.0    40.3    20.8
    2018 08 30    01 57 47.2 -61 30 32   0.6211  1.3965   115.7    40.6    20.8
    2018 08 31    01 58 54.0 -61 57 41   0.6150  1.3895   115.4    41.0    20.8
    ...
    2018 09 06    02 04 18.1 -64 40 52   0.5795  1.3472   113.3    43.4    20.6
    ...
    2018 09 14    02 06 57.1 -68 15 58   0.5341  1.2900   109.9    47.1    20.5
    ...
    2018 09 29    01 47 18.2 -74 32 15   0.4495  1.1812   102.1    56.0    20.2
    
    A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-Q99
    

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