Nakano Note (Nakano wa Kangaeru noda)                 NK 3233 



     P/2016 J1 (PANSTARRS)

     The following improved orbital elements, by S. Nakano, are
from 44 observations 2016 Mar. 4 to June 12.  Perturbations by Mercury
to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken
into account.  The mean residual is +/- 0.36 arc second.  See an orbit
of Nucleus B in NK 3234.


     Epoch =  2016 June 21.0 TT
     T     =  2016 June 24.20442  +/- 0.01245 (m.e.) TT 
     Peri. =   46.58348           +/- 0.00369
     Node  =  199.85570           +/- 0.00030   (2000.0)   
     Inc.  =   14.32994           +/- 0.00016
        q  =    2.4479993         +/- 0.0000158 AU
        e  =    0.2282582         +/- 0.0000038
        a  =    3.1720442         +/- 0.0000081 AU
        n' =    0.17445974        +/- 0.00000067
        P  =    5.649             +/- 0.0000218 years


     The predicted orbit for the 2022 return is as follows:

T     = 2022 Feb. 20.65291 TT       Epoch =  2022 Mar.  2.0 TT
Peri. =  46.98209                       e =    0.2277383
Node  = 199.81084    (2000.0)           a =    3.1720829 AU
Inc.  =  14.32851                       n'=    0.17445655
    q =   2.4496782 AU                  P =    5.650 years


     The following residuals in seconds of arc are from the above
orbital elements:

Date  Code  Residual(")   Date  Code  Residual(")   Date  Code  Residual(") 
2016/                     160505 F51  0.0   0.1-    160508 H01  0.3-  0.3+  
160304 F51  0.0   0.2+    160506 I52  1.6+  0.5-    160508 H01  0.2-  0.0   
160304 F51  0.3+  0.1+    160506 H06  0.5+  0.5-    160508 H01  0.3-  0.2-  
160403 F51  0.1-  0.1-    160506 H06  0.1+  0.4+    160508 691  0.2-  0.0   
160403 F51  0.3-  0.2-    160506 H06  0.0   0.8+    160508 691  0.1+  0.0   
160403 F51  0.2-  0.2-    160506 I52  1.0+  0.4+    160508 691  1.7-  0.9+  
160414 F51  0.4-  0.3-    160506 568  0.0   0.1+    160511 568  0.1-  0.1-  
160414 F51  0.2-  0.2-    160506 568  0.0   0.1+    160511 568  0.0   0.0   
160414 F51  0.1+  0.3-    160506 568  0.0   0.1+    160511 568  0.1-  0.1-  
160416 F51  0.2-  0.4-    160507 568  0.0   0.1+    160511 568  0.0   0.1-  
160416 F51  0.2-  0.3-    160507 568  0.0   0.1+    160606 695  0.2+  0.1-  
160416 F51  0.0   0.2-    160507 568  0.0   0.1+    160607 695  0.1+  0.3-  
160505 F51  0.1-  0.0     160508 H01  0.2-  0.0     160609 695  0.2-  0.2+  
160505 F51  0.2+  0.2-    160508 H01  0.1-  0.0     160611 695  0.1-  0.0   
160505 F51  0.1+  0.1+    160508 H01  0.1-  0.3-    160612 695  0.0   0.1+  

                                          ( ) -------- Rejected Obs.

Associate of the CBAT
Syuichi Nakano                                       2016 Sept. 2

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