[Iaude] MPEC X164: 2021 XC4 [a=1.42,e=0.53,i=0.9,H=26.2]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Wed Dec 8 20:02:02 EST 2021


M.P.E.C. 2021-X164                             Issued 2021 December 9, 01:00 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  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 XC4                                    


Observations:
     K21X04C* C2021 12 07.84769 03 40 04.44 +24 11 49.4          18.4 RoEX164K88
     K21X04C  C2021 12 07.84818 03 40 05.28 +24 11 50.5          18.5 RoEX164K88
     K21X04C  C2021 12 07.84867 03 40 05.91 +24 11 50.7          18.5 RoEX164K88
     K21X04C  C2021 12 07.85114 03 40 09.79 +24 11 55.7          18.3 RoEX164K88
     K21X04C  C2021 12 07.85163 03 40 10.56 +24 11 56.1          18.3 RoEX164K88
     K21X04C  C2021 12 07.85212 03 40 11.28 +24 11 56.3          18.1 RoEX164K88
     K21X04C  C2021 12 07.85262 03 40 12.08 +24 11 57.7          18.5 RoEX164K88
     K21X04C KC2021 12 07.86352 03 40 28.84 +24 12 16.0          18.6 RoEX164K88
     K21X04C KC2021 12 07.86499 03 40 31.05 +24 12 18.7          18.7 RoEX164K88
     K21X04C KC2021 12 07.86646 03 40 33.32 +24 12 20.7          18.7 RoEX164K88
     K21X04C KC2021 12 07.86794 03 40 35.56 +24 12 23.0          18.6 RoEX164K88
     K21X04C 1C2021 12 07.87428 03 40 47.66 +24 12 12.4          19.5 VVEX164033
     K21X04C 1C2021 12 07.87457 03 40 48.10 +24 12 13.1          19.5 VVEX164033
     K21X04C 1C2021 12 07.87486 03 40 48.52 +24 12 13.6          19.6 VVEX164033
     K21X04C 1C2021 12 07.87524 03 40 49.11 +24 12 14.2          19.6 VVEX164033
     K21X04C KC2021 12 07.88624 03 41 03.28 +24 12 51.3          18.7 RoEX164K88
     K21X04C KC2021 12 07.88771 03 41 05.49 +24 12 53.5          18.6 RoEX164K88
     K21X04C KC2021 12 07.88919 03 41 07.73 +24 12 55.8          18.5 RoEX164K88
     K21X04C KC2021 12 07.90121903 41 27.74 +24 13 25.5          18.7 GXEX164595
     K21X04C KC2021 12 07.90859203 41 38.63 +24 13 35.9          18.5 GXEX164595
     K21X04C KC2021 12 07.91596403 41 49.46 +24 13 46.5          18.7 GXEX164595
     K21X04C KC2021 12 07.92091203 41 56.58 +24 13 56.7          18.5 GVEX164L01
     K21X04C KC2021 12 07.92246203 41 58.85 +24 13 58.8          18.7 GVEX164L01
     K21X04C KC2021 12 07.92400803 42 01.08 +24 14 00.7          18.5 GVEX164L01
     K21X04C KC2021 12 07.92556103 42 03.34 +24 14 02.9          18.4 GVEX164L01
     K21X04C KC2021 12 07.92711903 42 05.62 +24 14 05.0          18.4 GVEX164L01
     K21X04C KC2021 12 07.94404703 42 34.77 +24 13 52.7          18.9 GVEX164Z80
     K21X04C KC2021 12 07.95438503 42 49.61 +24 14 05.9          18.6 GVEX164Z80
     K21X04C KC2021 12 07.96449503 43 04.11 +24 14 18.7                VEX164Z80
     K21X04C KC2021 12 08.02050 03 44 16.85 +24 15 18.9          18.5 RoEX164K88
     K21X04C KC2021 12 08.02372 03 44 21.34 +24 15 21.0          18.7 RoEX164K88
     K21X04C KC2021 12 08.11310 03 46 52.68 +24 18 09.4          18.9 GVEX164734
     K21X04C KC2021 12 08.11582 03 46 56.14 +24 18 13.5          19.0 GVEX164734
     K21X04C KC2021 12 08.11856 03 46 59.49 +24 18 16.8          19.0 GVEX164734
     K21X04C KC2021 12 08.12127 03 47 02.98 +24 18 20.8          19.0 GVEX164734
     K21X04C KC2021 12 08.12969 03 47 13.46 +24 18 32.8          19.2 GVEX164734
     K21X04C  C2021 12 08.24726703 49 37.35 +24 21 15.5          18.51GVEX164703
     K21X04C  C2021 12 08.25253903 49 43.19 +24 21 18.9          19.08GVEX164703
     K21X04C  C2021 12 08.25780403 49 49.07 +24 21 23.3          19.06GVEX164703
     K21X04C KC2021 12 08.31179 03 50 47.49 +24 22 00.2          18.7 GVEX164V21
     K21X04C KC2021 12 08.32059 03 50 57.00 +24 22 04.9          19.5 GVEX164V21
     K21X04C KC2021 12 08.32940 03 51 06.49 +24 22 08.7          19.3 GVEX164V21
     K21X04C KC2021 12 08.33803 03 51 15.70 +24 22 11.7          19.5 GVEX164V21
     K21X04C KC2021 12 08.98770804 02 09.22 +24 26 35.0          19.7 VZEX164W33
     K21X04C KC2021 12 08.99833404 02 17.26 +24 26 43.3          19.6 VZEX164W33
     K21X04C KC2021 12 09.00898204 02 25.13 +24 26 52.4          18.7 VZEX164W33

Observer details:
033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
    Hoegner, U. Laux, F. Ludwig, B. Stecklum.  Measurer B. Stecklum.  1.34-m
    f/3 Schmidt + CCD.
595 Farra d'Isonzo.  Observer E. Pettarin.  0.40-m f/5.15 reflector + CCD.
703 Catalina Sky Survey.  Observer D. Rankin.  Measurers E. J. Christensen, G.
    A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
    Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L. Seaman, F. C.
    Shelly, K. W. Wierzchos.  0.68-m Schmidt + 10K CCD.
734 Farpoint Observatory, Eskridge.  Observers G. Hug, D. Cromer, D. Goodin,
    R. Valentine.  Measurer D. Cromer.  0.7-m reflector + CCD.
K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  0.60-m Schmidt + CCD.
L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
    + CCD.
V21 Cewanee Observatory at DSNM.  Observer D. T. Durig.  0.4-m f/8 Ritchey-
    Chretien + 4656x3520 CCD.
W33 Transit Dreams Observatory, Campobello.  Observer D. Wilde.  0.36-m f/2
    Schmidt-Cassegrain + CCD.
Z80 Northolt Branch Observatory.  Observer G. Wells.  0.25-m f/8.0 Ritchey-
    Chretien + CCD.

Orbital elements:
2021 XC4                                                 Earth MOID = 0.0011 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  57.39086              (2000.0)            P               Q                  
n   0.58545425     Peri.  277.35607     +0.97239017     +0.23284882             
a   1.4151661      Node    69.18004     -0.20705351     +0.89141911             
e   0.5293454      Incl.    0.94725     -0.10763919     +0.38878452             
P   1.68           H   26.25          G   0.15           U   8                  
Residuals in seconds of arc
211207 K88  0.1+  0.3-    211207 K88  0.1+  0.1-    211208 734  0.6+  0.1+
211207 K88  1.2+  0.0     211207 K88  0.3+  0.0     211208 734  0.8-  0.6-
211207 K88  0.8-  0.7-    211207 595  0.1-  0.1+    211208 734  0.4+  0.4-
211207 K88  0.2+  0.1+    211207 595  0.1-  0.1-    211208 734  0.0   0.1-
211207 K88  0.4+  0.3-    211207 595  0.0   0.3+    211208 703  0.4+  1.0+
211207 K88  0.2-  1.0-    211207 L01  0.2-  0.1+    211208 703  0.3-  0.1-
211207 K88  0.2+  0.4-    211207 L01  0.0   0.1+    211208 703  0.0   0.2-
211207 K88  0.2+  0.2-    211207 L01  0.3-  0.0     211208 V21  0.0   0.5-
211207 K88  0.3-  0.1+    211207 L01  0.3-  0.2+    211208 V21  0.2+  0.0
211207 K88  0.0   0.2-    211207 L01  0.2-  0.2+    211208 V21  0.4+  0.0
211207 K88  0.2-  0.3-    211207 Z80  0.1-  0.6+    211208 V21  0.3-  0.4-
211207 033  0.1+  0.2-    211207 Z80  0.5-  0.0     211208 W33  0.5-  0.3+
211207 033  0.1+  0.1+    211207 Z80  0.3+  0.1-    211208 W33  0.3+  0.3-
211207 033  0.2-  0.1+    211208 K88  0.3+  0.3-    211209 W33  0.1+  0.1+
211207 033  0.1-  0.0     211208 K88  0.3+  0.6-
211207 K88  0.1+  0.2-    211208 734  0.2+  0.1-

Ephemeris:
2021 XC4                 a,e,i = 1.42, 0.53, 1                   q = 0.6661
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 09    16 45 43.6 -23 48 50   0.2642  0.7636    26.6   144.5    30.3
...
2021 11 24    17 01 39.9 -24 02 47   0.1080  0.8835    15.1   163.0    33.3
...
2021 12 02    17 34 57.6 -23 15 17   0.03293 0.9542    14.5   165.0    31.9
...
2021 12 08    03 43 58.6 +24 17 50   0.02409 1.0082   162.9    16.7    19.1
2021 12 09    04 02 03.4 +24 28 24   0.03316 1.0172   166.0    13.5    19.7
2021 12 10    04 12 24.2 +24 30 48   0.04235 1.0262   167.4    12.1    20.2
...
2021 12 16    04 33 58.7 +24 27 08   0.09861 1.0802   166.3    12.4    22.1
...
2021 12 24    04 42 27.9 +24 23 02   0.1767  1.1514   160.2    16.8    23.7
...
2022 01 08    04 53 09.0 +24 22 20   0.3369  1.2801   147.4    24.5    25.6

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X164




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