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    • MPEC 2023-R121 : 2023 QU18

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    M.P.E.C. 2023-R121                           Issued 2023 September 11, 10:50 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@CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                2023 QU18                                


Observations:
     K23Q18U* C2023 08 26.59017902 57 48.777-05 06 26.20         21.24wXER121F51
     K23Q18U  C2023 08 26.59959402 57 50.232-05 06 11.08         21.82wXER121F51
     K23Q18U  C2023 08 26.61010502 57 51.847-05 05 54.64         21.81wXER121F51
     K23Q18U  C2023 08 26.61956002 57 53.269-05 05 39.65         21.92wXER121F51
     K23Q18U  C2023 08 27.35058002 59 52.54 -04 45 52.7                WER121X09
     K23Q18U  C2023 08 27.38943502 59 58.41 -04 44 51.2                WER121X09
     K23Q18U KC2023 08 28.36477303 02 34.05 -04 19 40.6          21.5 VuER121H21
     K23Q18U KC2023 08 28.37036703 02 34.86 -04 19 31.8          21.8 VuER121H21
     K23Q18U KC2023 08 28.37596003 02 35.71 -04 19 23.2          21.8 VuER121H21
     K23Q18U  C2023 08 28.62626303 03 14.226-04 12 41.36         21.38GVER121F51
     K23Q18U  C2023 08 28.62707603 03 14.361-04 12 39.90         21.38GVER121F51
     K23Q18U  C2023 08 28.63120603 03 14.946-04 12 33.76         21.12GVER121F51
     K23Q18U  C2023 08 28.63201903 03 15.071-04 12 32.34         21.12GVER121F51
     K23Q18U 1C2023 09 11.10895 03 31 23.94 +01 23 14.9          21.6 VXER121033
     K23Q18U 1C2023 09 11.11225 03 31 24.22 +01 23 19.6          21.6 VXER121033
     K23Q18U 1C2023 09 11.11554 03 31 24.53 +01 23 24.3          21.6 VXER121033

Observer details:
033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
    Hoegner, F. Ludwig, M. Hartmann, B. Stecklum.  Measurer B. Stecklum.
    1.34-m f/3 Schmidt + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, P. Minguez, A.
    Schultz, I. Smith, K. Chambers.  Measurers K. Chambers, T. de Boer, J.
    Bulger, J. Fairlamb, H. Gao, M. Huber, C.-C. Lin, T. Lowe, E. Magnier, P.
    Minguez, Y. Ramanjooloo, A. Schultz, I. Smith, R. Wainscoat, R. Weryk, S.
    Chastel.  1.8-m 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.
X09 Deep Random Survey, Rio Hurtado.  Observers A. Schnabel, D. Ruhela.
    Measurer S. Deen.  0.43-m reflector + CMOS.

Orbital elements:
2023 QU18                                                Earth MOID = 0.1814 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
M   6.20275              (2000.0)            P               Q                  
n   0.27824435     Peri.  294.44251     +0.94281154     +0.32363291             
a   2.3237272      Node    46.78449     -0.25217230     +0.84908722             
e   0.5028568      Incl.    6.28641     -0.21798059     +0.41750765             
P   3.54           H   21.88          G   0.15           U   9                  
Residuals in seconds of arc
230826 F51  0.0   0.0     230828 H21  0.2+  0.0     230828 F51  0.0   0.0
230826 F51  0.1+  0.2+    230828 H21  0.1-  0.0     230911 033  0.0   0.1-
230826 F51  0.2+  0.1-    230828 H21  0.2+  0.2-    230911 033  0.1-  0.1-
230826 F51  0.2-  0.2-    230828 F51  0.2-  0.1+    230911 033  0.2+  0.0
230827 X09  0.8-  0.1+    230828 F51  0.1+  0.2+
230827 X09  0.7-  0.1+    230828 F51  0.1-  0.1-

Ephemeris:
2023 QU18                a,e,i = 2.32, 0.50, 6                   q = 1.1552
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 08 12    02 10 08.3 -11 43 01   0.3101  1.1605   110.8    54.7    21.7
...
2023 08 27    02 58 55.3 -04 55 23   0.3080  1.1568   110.9    54.7    21.6
...
2023 09 04    03 18 15.6 -01 28 59   0.3109  1.1650   112.8    53.0    21.6
...
2023 09 10    03 29 36.1 +00 57 23   0.3141  1.1757   115.2    50.8    21.6
2023 09 11    03 31 13.3 +01 21 01   0.3147  1.1778   115.6    50.4    21.6
2023 09 12    03 32 45.8 +01 44 27   0.3153  1.1800   116.1    50.0    21.6
...
2023 09 18    03 40 22.0 +04 00 34   0.3194  1.1956   119.6    47.0    21.6
...
2023 09 26    03 46 07.1 +06 50 51   0.3264  1.2214   125.5    42.0    21.5
...
2023 10 11    03 43 57.5 +11 34 59   0.3468  1.2838   140.0    30.0    21.4

M. P. C. Staff               (C) Copyright 2023 MPC           M.P.E.C. 2023-R121

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