Nakano Note (Nakano wa Kangaeru noda)                 NK 4664 



     P/2022 C1 (PANSTARRS)

     The following improved orbital elements, by S. Nakano, are
from 45 observations 2021 Nov. 6 to 2022 Mar. 2.  Perturbations by
Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta,
were taken into account.  The mean residual is +/- 0.29 arc second.
See an orbit in CBET 5096.


     Epoch =  2021 Nov.  2.0 TT
     T     =  2021 Nov.  4.80441  +/- 0.06588 (m.e.) TT 
     Peri. =    9.40853           +/- 0.00974
     Node  =  113.14965           +/- 0.00041   (2000.0)   
     Inc.  =    4.76260           +/- 0.00008
        q  =    3.9857823         +/- 0.0000624 AU
        e  =    0.4474048         +/- 0.0000208
        a  =    7.2128429         +/- 0.0002936 AU
        n' =    0.05087968        +/- 0.00000311
        P  =   19.371             +/- 0.0011829 years
                                 (+/- 0.43 day)


     The predicted orbit for the 2041 return is as follows:

T     = 2041 Apr. 30.71972 TT       Epoch =  2041 May   1.0 TT
Peri. =   9.82784                       e =    0.4481096
Node  = 113.14578    (2000.0)           a =    7.2235330 AU
Inc.  =   4.75999                       n'=    0.05076678
    q =   3.9865988 AU                  P =   19.414 years


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

Date  Code  Residual(")   Date  Code  Residual(")   Date  Code  Residual(") 
2021/                     220126 G96  0.2-  0.5-    220209 F52  0.1-  0.1+  
211106 F52  0.2+  0.3-    220126 G96  0.0   0.4+    220209 F52  0.0   0.1+  
211106 F52  0.4+  0.2-    220126 G96  0.6-  0.2+    220226 H06  0.5-  0.0   
211106 F52  0.0   0.1+    220126 G96  0.6-  0.1-    220226 H06  0.6-  0.4+  
211106 F52  0.0   0.4+    220201 G96  0.1-  0.1-    220227 G96  0.2-  0.2+  
211107 F51  0.2-  0.0     220201 G96  0.5-  0.0     220227 G96  0.1-  0.5-  
211107 F51  0.1-  0.0     220201 G96  0.3-  0.0     220227 G96  0.2-  0.6-  
211107 F51  0.4-  0.2+    220201 G96  0.1-  0.0     220227 G96  0.0   0.1-  
211110 F51  0.2+  0.0     220203 F52  0.1-  0.0     220228 215  0.2-  1.0+  
211111 F51  0.0   0.1-    220203 F52  0.1+  0.1-    220228 215  0.4-  0.8+  
211111 F51  0.0   0.1+    220203 F52  0.0   0.1-    220228 215  1.0-  0.9+  
211111 F51  0.1-  0.1-    220203 F52  0.1+  0.0     220302 F52  0.1+  0.1-  
211111 F51  0.1-  0.0     220203 F52  0.2+  0.0     220302 F52  0.1+  0.1+  
2022/                     220203 F52  0.0   0.1-    220302 F52  0.1+  0.1-  
220108 F52  0.3+  0.1-    220209 F52  0.0   0.0     220302 F52  0.1+  0.1-  
220108 F52  0.2-  0.1+    220209 F52  0.0   0.0                             

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

Associate of the CBAT
Syuichi Nakano                                       2022 Mar. 15

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