[Iaude] MPEC X163: 2021 XA4 [a=1.22,e=0.45,i=12.1,H=26.5]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Wed Dec 8 16:20:19 EST 2021


M.P.E.C. 2021-X163                             Issued 2021 December 8, 21:18 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 XA4                                    


Observations:
     K21X04A  C2021 12 06.19722 03 11 27.91 -16 17 43.1                VEX163G96
     K21X04A  C2021 12 06.20290 03 11 35.96 -16 05 52.9                VEX163G96
     K21X04A  C2021 12 06.21423 03 11 51.83 -15 42 20.8                VEX163G96
     K21X04A* C2021 12 08.24550003 39 26.15 +20 22 44.4          19.77GVEX163703
     K21X04A  C2021 12 08.25076703 39 27.62 +20 25 13.9          19.53GVEX163703
     K21X04A  C2021 12 08.25603503 39 29.01 +20 27 42.7          19.30GVEX163703
     K21X04A mC2021 12 08.29212603 39 39.11 +20 44 34.1          18.92GVEX163I52
     K21X04A mC2021 12 08.29236003 39 39.18 +20 44 40.5          19.05GVEX163I52
     K21X04A mC2021 12 08.29259503 39 39.25 +20 44 47.0          19.12GVEX163I52
     K21X04A mC2021 12 08.29283003 39 39.31 +20 44 53.3          19.20GVEX163I52
     K21X04A mC2021 12 08.33420003 39 51.03 +21 03 37.4          19.53GVEX163I52
     K21X04A mC2021 12 08.33443403 39 51.08 +21 03 44.0          19.57GVEX163I52
     K21X04A mC2021 12 08.33466803 39 51.16 +21 03 50.0          19.57GVEX163I52
     K21X04A mC2021 12 08.33490303 39 51.21 +21 03 56.5          19.51GVEX163I52
     K21X04A  C2021 12 08.56828 03 41 27.30 +22 42 27.7          19.7 RrEX163P93
     K21X04A  C2021 12 08.56992 03 41 27.71 +22 43 06.5          20.0 RrEX163P93
     K21X04A  C2021 12 08.57322 03 41 28.48 +22 44 24.2          19.6 RrEX163P93

Observer details:
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.
G96 Mt. Lemmon Survey.  Observer K. W. Wierzchos.  Measurers E. J.
    Christensen, B. Gray, D. Rankin, F. C. Shelly.  1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer H. Groeller.  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.
P93 Space Tracking and Communications Center, JAXA.  Observers S. Urakawa, T.
    Fujiwara.  1.0-m f/3.0 reflector + CCD.

Orbital elements:
2021 XA4                                                 Earth MOID = 0.0100 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  75.60268              (2000.0)            P               Q                  
n   0.73043607     Peri.  265.65963     +0.92489894     +0.32167779             
a   1.2210907      Node    75.47765     -0.20848867     +0.87489887             
e   0.4487190      Incl.   12.08632     -0.31795351     +0.36204332             
P   1.35           H   26.59          G   0.15           U   8                  
Residuals in seconds of arc
211206 G96  0.2+  0.1+    211208 I52  0.0   0.4+    211208 I52  0.3+  0.0
211206 G96  0.1+  0.6-    211208 I52  0.0   0.3+    211208 I52  0.1+  0.3+
211206 G96  0.3-  0.5+    211208 I52  0.0   0.4+    211208 P93  0.5-  0.2+
211208 703  1.0+  0.4+    211208 I52  0.1-  0.2+    211208 P93  0.2-  0.0
211208 703  0.9+  0.4-    211208 I52  0.3+  0.0     211208 P93  0.2-  0.1+
211208 703  0.3-  1.3-    211208 I52  0.1+  0.3+

Ephemeris:
2021 XA4                 a,e,i = 1.22, 0.45, 12                  q = 0.6732
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 08    16 05 42.6 -43 56 41   0.2574  0.7833    31.6   138.5    29.8
...
2021 11 23    16 14 56.9 -49 33 38   0.1123  0.8916    29.6   146.8    29.5
...
2021 12 01    16 36 43.9 -59 28 04   0.04160 0.9536    37.8   140.7    26.5
...
2021 12 07    03 27 15.1 +04 55 47   0.01718 1.0005   152.6    26.9    19.0
2021 12 08    03 37 39.6 +18 17 24   0.02458 1.0084   160.6    18.9    19.5
2021 12 09    03 43 44.2 +25 14 32   0.03274 1.0161   161.8    17.6    20.1
...
2021 12 15    03 57 17.5 +37 16 09   0.08522 1.0626   155.8    22.3    22.4
...
2021 12 23    04 04 23.2 +40 17 03   0.1585  1.1233   149.6    26.3    24.0
...
2022 01 07    04 17 31.0 +41 07 15   0.3060  1.2314   139.2    31.4    25.8

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X163




More information about the Iaude mailing list