[Iaude] MPEC W154: 2021 RK237 [a=43.23,e=0.05,i=4.1,H=9.4]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2023-W154                            Issued 2023 November 29, 22:00 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets, routine data on comets and natural satellites,
         and occasional editorial announcements.  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 at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                   2021 RK237                                   


Observations:
     K21RN7K (C2019 08 29.21191823 28 51.506-05 30 31.79         25.26rVEW154W84
     K21RN7K (C2019 08 29.38711323 28 50.732-05 30 36.56         25.26rVEW154W84
     K21RN7K (C2020 10 16.00179223 30 20.169-05 14 13.41         25.51rVEW154W84
     K21RN7K (C2020 10 16.17580423 30 19.514-05 14 16.94         25.51rVEW154W84
     K21RN7K*(C2021 09 05.09609923 38 14.476-04 18 39.04         25.70rVEW154W84
     K21RN7K (C2021 09 05.19592923 38 13.994-04 18 42.80         25.70rVEW154W84
     K21RN7K (C2021 10 07.00480523 35 53.714-04 33 07.14         25.42rVEW154W84
     K21RN7K (C2021 10 07.16993323 35 53.006-04 33 11.12         25.42rVEW154W84

Observer details:
W84 Cerro Tololo-DECam.  Observers C. Trujillo, L. Markwardt, H. Smotherman,
    P. H. Bernardinelli, K. Napier, R. Strauss, W. Oldroyd, S. Portillo, D.
    Bektesevic, C. Chandler, M. Porter, A. Simpson, K. Weber, G. Gowman, M.
    Juric, D. Trilling, M. Holman, D. Gerdes, H. W. Lin, A. Connolly, F.
    Adams, C. Fuentes, A. McNeill, M. Payne, D. Ragozzine, A. Rivkin, H.
    Schlichting, S. Sheppard, M. Mommert.  4.02-m Prime focus + CCD.

Orbital elements:
2021 RK237                                                                      
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Pike                    
M  53.58076              (2000.0)            P               Q                  
n   0.00346709     Peri.  278.29106     +0.45138068     +0.89204554             
a  43.2340826      Node    18.59216     -0.78828022     +0.41048210             
e   0.0546454      Incl.    4.06270     -0.41817433     +0.18910104             
P 284              H    9.45          G   0.15           U   7                  
Residuals in seconds of arc
190829 W84  0.1+  0.0     201016 W84  0.0   0.2+    211007 W84  0.1+  0.0
190829 W84  0.0   0.0     210905 W84  0.3+  0.4+    211007 W84  0.1-  0.1+
201016 W84  0.1-  0.0     210905 W84  0.3-  0.5-

Ephemeris:
2021 RK237               a,e,i = 43.23, 0.05, 4                  q = 40.8715
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 10 30    23 44 20.0 -03 26 07  41.1698 41.9249   139.0     0.9    25.8
...
2023 11 14    23 43 39.5 -03 29 46  41.3677 41.9267   123.8     1.1    25.8
...
2023 11 22    23 43 24.8 -03 30 55  41.4898 41.9277   115.7     1.2    25.8
...
2023 11 28    23 43 17.3 -03 31 23  41.5870 41.9285   109.6     1.3    25.8
2023 11 29    23 43 16.3 -03 31 26  41.6035 41.9286   108.6     1.3    25.8
2023 11 30    23 43 15.4 -03 31 28  41.6202 41.9287   107.6     1.3    25.8
...
2023 12 06    23 43 12.1 -03 31 29  41.7220 41.9294   101.5     1.3    25.8
...
2023 12 14    23 43 12.8 -03 30 57  41.8610 41.9304    93.4     1.3    25.9
...
2023 12 29    23 43 29.8 -03 28 15  42.1225 41.9322    78.2     1.3    25.9

M. P. C. Staff               (C) Copyright 2023 MPC           M.P.E.C. 2023-W154