[Iaude] MPEC U267: 2023 UM9 [a=1.28,e=0.28,i=19.0,H=22.8]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Oct 26 09:42:32 EDT 2023 

M.P.E.C. 2023-U267                             Issued 2023 October 26, 13:40 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

                                    2023 UM9                                    


Observations:
     K23U09M*1C2023 10 22.40631307 00 09.241+29 20 58.20         20.60GVEU267G96
     K23U09M 1C2023 10 22.41154407 00 12.222+29 20 01.75         20.18GVEU267G96
     K23U09M 1C2023 10 22.41676907 00 15.181+29 19 04.73         19.79GVEU267G96
     K23U09M 1C2023 10 22.42199807 00 18.122+29 18 08.68         20.06GVEU267G96
     K23U09M  C2023 10 22.44408507 00 30.251+29 14 08.07         21.0 GVEU267H01
     K23U09M  C2023 10 22.44949707 00 33.293+29 13 09.15         20.1 GVEU267H01
     K23U09M  C2023 10 22.45834807 00 38.261+29 11 32.77         19.6 GVEU267H01
     K23U09M  C2023 10 22.47101107 00 45.349+29 09 14.71         21.3 GVEU267H01
     K23U09M KC2023 10 22.50702207 01 05.740+29 02 42.70         19.97GVEU267I52
     K23U09M KC2023 10 22.51074007 01 07.870+29 02 01.10         20.54GVEU267I52
     K23U09M KC2023 10 22.51259907 01 08.920+29 01 41.10         20.86GVEU267I52
     K23U09M KC2023 10 23.37282407 09 33.12 +26 19 59.5          20.7 VuEU267H21
     K23U09M KC2023 10 23.37403607 09 33.79 +26 19 45.8          20.8 VuEU267H21
     K23U09M KC2023 10 23.37487507 09 34.25 +26 19 36.1          21.1 VuEU267H21
     K23U09M mC2023 10 26.50011807 38 35.272+15 39 11.92         19.92GVEU267I52
     K23U09M mC2023 10 26.50054007 38 35.484+15 39 06.19               VEU267I52
     K23U09M mC2023 10 26.50190107 38 36.204+15 38 48.34         20.67GVEU267I52
     K23U09M mC2023 10 26.50232807 38 36.377+15 38 42.97         20.43GVEU267I52
     K23U09M mC2023 10 26.50369507 38 37.054+15 38 26.12         20.56GVEU267I52
     K23U09M mC2023 10 26.50411007 38 37.280+15 38 20.69         20.38GVEU267I52

Observer details:
G96 Mt. Lemmon Survey.  Observer J. K. Hogan.  Measurers E. C. Beshore, D.
    Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, J.
    K. Hogan, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 Ritchey-Chretien + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers T. Linder, R. Holmes, L. Horn.  0.76-m f/3.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observers J. B. Fazekas, K. W.
    Wierzchos.  Measurers E. C. Beshore, D. Fay, J. B. Fazekas, D. C. Fuls, A.
    R. Gibbs, A. D. Grauer, H. Groeller, J. K. Hogan, R. A. Kowalski, S. M.
    Larson, G. J. Leonard, D. Rankin, R. L. Seaman, F. C. Shelly, K. W.
    Wierzchos.  1.0-m prime focus + CCD.

Orbital elements:
2023 UM9                                                 Earth MOID = 0.0256 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
M 298.07635              (2000.0)            P               Q                  
n   0.68224410     Peri.  237.74687     -0.05078581     -0.97950936             
a   1.2779372      Node   216.74870     +0.99032905     -0.02416431             
e   0.2812800      Incl.   19.01020     +0.12910915     -0.19994373             
P   1.44           H   22.85          G   0.15           U   9                  
Residuals in seconds of arc
231022 G96  0.2-  0.2+    231022 H01  0.1+  0.0     231026 I52  0.2+  0.6+
231022 G96  0.0   0.3+    231022 I52  0.6-  0.3+    231026 I52  0.2+  0.2+
231022 G96  0.1+  0.3-    231022 I52  0.1+  0.5-    231026 I52  0.6+  0.1-
231022 G96  0.0   0.2+    231022 I52  0.3+  0.0     231026 I52  0.0   0.0
231022 H01  0.0   0.1+    231023 H21  0.0   0.3-    231026 I52  0.2-  0.7+
231022 H01  0.1+  0.0     231023 H21  0.1-  0.1-    231026 I52  0.0   0.6+
231022 H01  0.1+  0.0     231023 H21  0.1-  0.2-

Ephemeris:
2023 UM9                 a,e,i = 1.28, 0.28, 19                  q = 0.9185
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 09 26    03 02 39.7 +56 16 22   0.2723  1.1433   114.6    52.9    22.3
...
2023 10 11    05 03 13.0 +51 13 49   0.1698  1.0781   113.7    58.0    21.3
...
2023 10 19    06 25 40.8 +38 31 08   0.1280  1.0452   109.1    64.3    20.8
...
2023 10 25    07 24 54.5 +20 55 49   0.1107  1.0219   101.2    72.7    20.7
2023 10 26    07 34 04.4 +17 26 26   0.1095  1.0182    99.5    74.4    20.7
2023 10 27    07 42 59.6 +13 52 12   0.1089  1.0145    97.7    76.1    20.7
...
2023 11 02    08 31 11.4 -07 01 46   0.1165  0.9934    87.1    86.2    21.2
...
2023 11 10    09 22 23.2 -27 00 14   0.1493  0.9683    77.2    94.2    22.0
...
2023 11 25    10 32 43.9 -43 53 08   0.2377  0.9337    70.2    96.0    23.0

M. P. C. Staff               (C) Copyright 2023 MPC           M.P.E.C. 2023-U267

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