[Iaude] MPEC X74: 2021 XA1 [a=0.72,e=0.41,i=6.3,H=27.0]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Fri Dec 3 10:50:23 EST 2021


M.P.E.C. 2021-X74                              Issued 2021 December 3, 15:49 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 XA1                                    


Observations:
     K21X01A* C2021 12 01.35205607 40 27.42 +37 00 47.0          21.00GVEX074G96
     K21X01A  C2021 12 01.35718307 40 19.23 +37 02 00.8          21.17GVEX074G96
     K21X01A  C2021 12 01.36231307 40 10.87 +37 03 14.7          21.31GVEX074G96
     K21X01A  C2021 12 01.36746007 40 02.28 +37 04 29.9          21.44GVEX074G96
     K21X01A KC2021 12 01.48553507 36 44.70 +37 32 25.2          21.36GVEX074I52
     K21X01A KC2021 12 01.48741107 36 41.56 +37 32 52.3          21.03GVEX074I52
     K21X01A KC2021 12 01.48835407 36 39.90 +37 33 04.6          20.96GVEX074I52
     K21X01A 1C2021 12 01.98957 07 22 54.54 +39 29 34.0          21.6 VVEX074033
     K21X01A 1C2021 12 01.99021 07 22 53.39 +39 29 42.4          21.9 VVEX074033
     K21X01A 1C2021 12 01.99084 07 22 52.23 +39 29 52.2          27.7 VVEX074033
     K21X01A KC2021 12 02.26379007 14 47.78 +40 33 45.4          20.61GVEX074I52
     K21X01A KC2021 12 02.26452907 14 46.31 +40 33 56.1          20.59GVEX074I52
     K21X01A KC2021 12 02.26642907 14 42.70 +40 34 23.4          20.71GVEX074I52
     K21X01A KC2021 12 02.26716707 14 41.25 +40 34 33.9          20.45GVEX074I52
     K21X01A 1C2021 12 03.00130 06 50 18.39 +43 17 15.0          21.1 VVEX074033
     K21X01A 1C2021 12 03.00199 06 50 16.85 +43 17 23.6          21.1 VVEX074033
     K21X01A 1C2021 12 03.00268 06 50 15.36 +43 17 32.8          21.5 VVEX074033
     K21X01A 1C2021 12 03.00337 06 50 13.85 +43 17 41.9          21.3 VVEX074033
     K21X01A KC2021 12 03.34797106 37 45.93 +44 30 21.4          20.37GVEX074I52
     K21X01A KC2021 12 03.35152106 37 37.56 +44 31 05.2          20.10GVEX074I52
     K21X01A KC2021 12 03.35511006 37 29.11 +44 31 48.9          20.39GVEX074I52
     K21X01A KC2021 12 03.35873606 37 20.57 +44 32 33.1          20.46GVEX074I52

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.
G96 Mt. Lemmon Survey.  Observer A. R. Gibbs.  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.  1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station.  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.

Orbital elements:
2021 XA1                                                 Earth MOID = 0.0093 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M 246.66844              (2000.0)            P               Q                  
n   1.60149354     Peri.  191.90183     -0.22378028     +0.96958918             
a   0.7235234      Node    65.23275     -0.88502336     -0.15956576             
e   0.4081213      Incl.    6.26517     -0.40823527     -0.18556828             
P   0.62           H   27.01          G   0.15           U   7                  
Residuals in seconds of arc
211201 G96 (2.8-  1.6+)   211201 033  0.1-  0.9-    211203 033  0.2+  0.2+
211201 G96  0.2-  0.9+    211201 033  0.2-  0.2-    211203 033  0.3+  0.3+
211201 G96  0.7+  0.3+    211202 I52  0.4+  0.1+    211203 I52  0.0   0.3-
211201 G96  0.7-  1.0+    211202 I52  0.3-  0.1+    211203 I52  0.1-  0.1+
211201 I52  0.3+  0.2+    211202 I52  0.1+  0.0     211203 I52  0.1-  0.0
211201 I52 (0.6+  1.2+)   211202 I52  0.3-  0.3-    211203 I52  0.0   0.0
211201 I52  0.2-  0.4+    211203 033  0.2+  0.3+
211201 033  0.3-  0.2-    211203 033  0.1-  0.1-

Ephemeris:
2021 XA1                 a,e,i = 0.72, 0.41, 6                   q = 0.4282
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 03    10 20 01.6 -02 50 26   0.1427  0.9366    63.3   108.9    26.7
...
2021 11 18    09 49 28.9 +06 19 11   0.08309 0.9894    88.2    87.0    24.6
...
2021 11 26    09 05 29.5 +19 17 04   0.05274 1.0066   110.5    66.7    23.0
...
2021 12 02    07 22 30.8 +39 32 50   0.03711 1.0147   139.9    38.8    21.4
2021 12 03    06 50 18.3 +43 17 25   0.03598 1.0156   145.1    33.7    21.2
2021 12 04    06 12 19.8 +46 30 51   0.03545 1.0164   149.5    29.5    21.1
...
2021 12 10    02 19 29.9 +46 15 57   0.04436 1.0188   139.0    39.3    21.8
...
2021 12 18    00 36 23.9 +33 39 03   0.07331 1.0154   113.5    62.7    23.6
...
2022 01 02    23 56 39.5 +24 34 28   0.1350  0.9889    88.4    83.7    25.6

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X74




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