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  • MPEC 2017-E48 : 2015 LK21

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    M.P.E.C. 2017-E48                                Issued 2017 Mar. 5, 22:59 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
    
                                       2015 LK21
    
                               Revision to MPEC 2015-L53
    
    Additional Observations:
         K15L21K |C2017 02 27.12268 10 30 24.79 +03 57 16.8          22.6 VuEE048807
         K15L21K |C2017 02 27.13417 10 30 24.16 +03 57 22.3          22.6 VuEE048807
         K15L21K |C2017 02 27.14569 10 30 23.58 +03 57 29.4          22.5 VuEE048807
         K15L21K |C2017 03 05.20954 10 25 13.80 +04 51 40.2          22.6 VuEE048807
         K15L21K |C2017 03 05.22693 10 25 12.91 +04 51 49.7          22.5 VuEE048807
         K15L21K |C2017 03 05.24415 10 25 12.00 +04 51 58.5          22.8 VuEE048807
    
    Observer details:
    807 Cerro Tololo.  Observers T. Linder, R. Holmes.  0.61-m f/6.5 astrograph
        + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    170227 807  8.8-  1.1+    170305 807  8.8-  1.3+    MPO349340   -0.0018 day
    
    Orbital elements:
    2015 LK21                                                Earth MOID = 0.1070 AU
    Epoch 2017 Feb. 16.0 TT = JDT 2457800.5  (M-h)          MPC
    M  86.22662              (2000.0)            P               Q
    n   0.21517732     Peri.  203.51384     +0.97740266     -0.18746641
    a   2.7580686      Node   166.17650     +0.18825316     +0.98211983
    e   0.6069835      Incl.   24.12938     -0.09614985     +0.01723351
    P   4.58           H   17.5           G   0.15           U   2
    Residuals in seconds of arc
    150525 F51  0.2-  0.1-    150612 F51  0.3+  0.1+    150621 691  0.6-  0.3-
    150525 F51  0.0   0.0     150613 926  0.2+  0.1+    150622 691  0.3-  0.0
    150525 F51  0.4+  0.1-    150613 926  0.4+  0.3+    150622 691  0.5-  0.0
    150526 F51  0.2+  0.1-    150613 926  0.5+  0.4-    150622 691  0.1-  0.2-
    150526 F51  0.2+  0.0     150614 926  0.4+  0.2-    150712 691  0.2-  0.1+
    150526 F51  0.1+  0.1-    150614 926  0.3-  0.2-    150712 691  0.4+  0.1+
    150526 F51  0.1+  0.1+    150614 926  0.3+  0.1-    150712 691  0.3-  0.4+
    150611 F51  0.2+  0.2-    150614 291  0.1-  0.1-    150819 291  0.1+  0.1+
    150611 F51  0.1+  0.0     150614 291  0.3-  0.4+    150819 291  0.0   0.1+
    150611 F51  0.0   0.4+    150614 291  0.0   0.0     150819 291  0.6+  0.4+
    150612 691  1.0-  0.1-    150615 926  0.2+  0.1+    150904 807  0.3-  0.0
    150612 691  0.3+  0.0     150615 926  0.2-  0.2+    150905 807  0.2-  0.1+
    150612 691  0.4-  0.0     150615 926  0.1+  0.6+    150905 807  0.0   0.1+
    150612 I52  1.0-  0.4+    150615 291  0.2-  0.1+    170227 807  0.1-  0.0
    150612 I52  0.5-  0.3+    150615 291  0.1+  0.1+    170227 807  0.4-  0.7-
    150612 I52  0.0   0.0     150615 291  0.2+  0.0     170227 807  0.1+  0.2+
    150612 F51  0.2+  0.1-    150620 691  0.0   0.2-    170305 807  0.3+  0.4+
    150612 568  0.1+  0.0     150620 691  0.1+  0.0     170305 807  0.2+  0.7+
    150612 568  0.1+  0.0     150620 691  0.0   0.1+    170305 807  0.2-  0.3+
    150612 568  0.1+  0.0     150621 691  0.3+  0.6-
    150612 F51  0.2+  0.2+    150621 691  0.2-  0.4-
    
    Ephemeris:
    2015 LK21                a,e,i = 2.76, 0.61, 24                  q = 1.0840
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 02 03    10 50 38.4 +00 34 10   2.5774  3.4644   149.7     8.2    22.8
    ...
    2017 02 18    10 38 22.4 +02 36 04   2.5590  3.5311   167.8     3.4    22.6
    ...
    2017 02 26    10 31 23.3 +03 47 10   2.5784  3.5656   174.8     1.4    22.5
    ...
    2017 03 04    10 26 14.5 +04 40 53   2.6069  3.5909   171.7     2.3    22.6
    2017 03 05    10 25 24.3 +04 49 46   2.6128  3.5951   170.7     2.6    22.6
    2017 03 06    10 24 34.6 +04 58 37   2.6190  3.5993   169.6     2.8    22.7
    ...
    2017 03 12    10 19 48.0 +05 50 37   2.6631  3.6241   162.8     4.7    22.8
    ...
    2017 03 20    10 14 06.6 +06 55 52   2.7390  3.6564   153.4     7.0    23.0
    ...
    2017 04 04    10 06 12.0 +08 39 46   2.9279  3.7152   136.2    10.7    23.4
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-E48
    

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