[Iaude] MPEC U25: 2020 KE54 [a=39.49,e=0.21,i=21.4,H=8.04]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2023-U25                              Issued 2023 October 16, 20:39 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

                                   2020 KE54                                    


Additional Observations:
     K20K54E &C2021 03 02.36314319 18 01.64 -19 24 28.0                WEU025W84
     K20K54E &C2021 03 02.37049219 18 01.69 -19 24 27.7                WEU025W84
     K20K54E &C2021 03 02.37567519 18 01.69 -19 24 27.7                WEU025W84
     K20K54E 1C2023 08 14.19634019 26 12.328-17 14 00.85         22.3 GWEU025G37
     K20K54E 1C2023 08 14.24493019 26 12.081-17 14 01.29               WEU025G37
     K20K54E 1C2023 08 14.29285019 26 11.798-17 14 00.93               WEU025G37

Observer details:
G37 Lowell Discovery Telescope.  Observer L. H. Wasserman.  4.3-m Lowell
    Discovery Telescope + CCD.
W84 Cerro Tololo-DECam.  Observer .  Measurer S. Deen.  4.0-m reflector + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
210302 W84  1.4+  0.2+    230814 G37  7.0+  3.2+    MPO735620   -53.7 days

Orbital elements:
2020 KE54                                                                       
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Alexandersen            
M  39.61051              (2000.0)            P               Q                  
n   0.00397157     Peri.  314.17834     -0.53987911     +0.76088323             
a  39.4906804      Node   279.75568     -0.62973223     -0.64887724             
e   0.2109276      Incl.   21.42385     -0.55854083     -0.00387805             
P 248              H    8.04          G   0.15           U   5                  
Residuals in seconds of arc
200526 266  0.0   0.0     200531 266  0.0   0.0     200814 266  0.0   0.0
200526 266  0.0   0.0     200621 266  0.0   0.0     200814 266  0.0   0.0
200526 266  0.0   0.0     200621 266  0.0   0.0     210302 W84  0.0   0.0
200529 266  0.0   0.0     200621 266  0.0   0.0     210302 W84  0.1+  0.1+
200529 266  0.0   0.0     200624 266  0.0   0.0     210302 W84  0.3-  0.0
200529 266  0.0   0.0     200624 266  0.0   0.0     230814 G37  0.2+  0.2-
200531 266  0.0   0.0     200624 266  0.0   0.0     230814 G37  0.2+  0.3-
200531 266  0.0   0.0     200814 266  0.0   0.0     230814 G37  0.3-  0.5+

Ephemeris:
2020 KE54                a,e,i = 39.49, 0.21, 21                 q = 31.1610
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 09 16    19 24 12.3 -17 17 49  33.5177 33.9932   117.5     1.5    23.5
...
2023 10 01    19 23 55.1 -17 18 43  33.7653 34.0008   102.8     1.6    23.6
...
2023 10 09    19 23 57.1 -17 18 53  33.9043 34.0048    94.9     1.7    23.6
...
2023 10 15    19 24 03.7 -17 18 49  34.0099 34.0078    89.0     1.7    23.6
2023 10 16    19 24 05.3 -17 18 48  34.0275 34.0083    88.1     1.7    23.6
2023 10 17    19 24 06.9 -17 18 46  34.0451 34.0088    87.1     1.7    23.6
...
2023 10 23    19 24 19.5 -17 18 31  34.1501 34.0119    81.2     1.7    23.6
...
2023 10 31    19 24 42.9 -17 17 54  34.2874 34.0159    73.3     1.6    23.6
...
2023 11 15    19 25 46.4 -17 15 55  34.5285 34.0235    58.6     1.4    23.6

M. P. C. Staff               (C) Copyright 2023 MPC           M.P.E.C. 2023-U25