[Iaude] MPEC X173: 2021 XN4 [a=1.31,e=0.25,i=23.3,H=23.8]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Dec 9 11:25:53 EST 2021


M.P.E.C. 2021-X173                             Issued 2021 December 9, 16:24 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 XN4                                    


Observations:
     K21X04N* C2021 12 08.10799423 34 37.71 +26 59 12.0          20.63GVEX173G96
     K21X04N  C2021 12 08.11375823 34 45.37 +26 57 42.6          19.97GVEX173G96
     K21X04N  C2021 12 08.11949523 34 53.03 +26 56 13.4          20.04GVEX173G96
     K21X04N  C2021 12 08.12524223 35 00.64 +26 54 44.1          19.96GVEX173G96
     K21X04N KC2021 12 08.17366923 36 05.12 +26 42 06.1          19.85GVEX173I52
     K21X04N KC2021 12 08.17444223 36 06.16 +26 41 53.9          19.81GVEX173I52
     K21X04N KC2021 12 08.17521523 36 07.18 +26 41 41.9          20.00GVEX173I52
     K21X04N KC2021 12 08.21162523 36 55.93 +26 32 06.4          20.38GVEX173I52
     K21X04N KC2021 12 08.21317423 36 58.00 +26 31 41.8          20.57GVEX173I52
     K21X04N KC2021 12 08.21472323 37 00.08 +26 31 17.3          20.21GVEX173I52
     K21X04N  C2021 12 08.24749423 37 44.12 +26 22 30.1          20.6 GVEX173H01
     K21X04N  C2021 12 08.25913323 37 59.89 +26 19 24.4          20.1 GVEX173H01
     K21X04N  C2021 12 08.27646523 38 23.44 +26 14 46.9          19.8 GVEX173H01
     K21X04N  C2021 12 08.28095823 38 29.56 +26 13 34.9          19.6 GVEX173H01
     K21X04N KC2021 12 08.98167123 54 35.92 +23 03 35.3          19.9 VuEX173H21
     K21X04N KC2021 12 08.98552823 54 40.97 +23 02 30.8          20.0 VuEX173H21
     K21X04N KC2021 12 08.98745723 54 43.49 +23 01 58.2          20.1 VuEX173H21
     K21X04N KC2021 12 08.98977123 54 46.51 +23 01 19.3          20.2 VuEX173H21
     K21X04N  C2021 12 09.10728323 57 22.71 +22 28 30.3          20.09GVEX173G96
     K21X04N KC2021 12 09.11097423 57 27.51 +22 27 27.4          20.30GVEX173I52
     K21X04N KC2021 12 09.11177323 57 28.54 +22 27 14.0          20.16GVEX173I52
     K21X04N KC2021 12 09.11257223 57 29.57 +22 27 00.3          20.16GVEX173I52
     K21X04N  C2021 12 09.11303123 57 30.23 +22 26 51.7          20.13GVEX173G96
     K21X04N KC2021 12 09.11337223 57 30.63 +22 26 46.5          20.38GVEX173I52
     K21X04N KC2021 12 09.11748523 57 32.53 +22 25 21.7          19.9 VZEX173W33
     K21X04N  C2021 12 09.11877623 57 37.67 +22 25 14.7          20.29GVEX173G96
     K21X04N KC2021 12 09.12375123 57 40.74 +22 23 33.6          20.6 VZEX173W33
     K21X04N KC2021 12 09.12997323 57 48.82 +22 21 46.9          20.9 VZEX173W33

Observer details:
G96 Mt. Lemmon Survey.  Observer R. A. Kowalski.  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.
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.  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.
W33 Transit Dreams Observatory, Campobello.  Observer D. Wilde.  0.36-m f/2
    Schmidt-Cassegrain + CCD.

Orbital elements:
2021 XN4                                                 Earth MOID = 0.0309 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  48.35193              (2000.0)            P               Q                  
n   0.66024516     Peri.  142.68418     +0.72404718     -0.57189534             
a   1.3061686      Node   256.75287     +0.49771424     +0.82023554             
e   0.2534398      Incl.   23.33749     +0.47753138     +0.01222182             
P   1.49           H   23.87          G   0.15           U   8                  
Residuals in seconds of arc
211208 G96  0.2-  0.2-    211208 H01  0.2+  0.0     211209 I52  0.3-  0.3+
211208 G96  0.1-  0.2-    211208 H01  0.1+  0.2+    211209 I52  0.3-  0.2+
211208 G96  0.3+  0.2-    211208 H01  0.0   0.1+    211209 G96  0.5+  0.7-
211208 G96  0.0   0.1-    211208 H01  0.1-  0.2+    211209 I52  0.1-  0.1-
211208 I52  0.2-  0.1+    211208 H21  0.3+  0.1+    211209 W33  0.7+  0.4-
211208 I52  0.1-  0.1+    211208 H21  0.3+  0.2+    211209 G96  0.2+  0.2+
211208 I52  0.2-  0.2+    211208 H21  0.3+  0.1-    211209 W33  0.5+  0.9-
211208 I52  0.0   0.1+    211208 H21  0.2+  0.2-    211209 W33  0.4-  0.9-
211208 I52  0.1-  0.1+    211209 G96  0.3-  0.1+
211208 I52  0.1-  0.1+    211209 I52  0.2-  0.1+

Ephemeris:
2021 XN4                 a,e,i = 1.31, 0.25, 23                  q = 0.9751
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 09    18 28 45.4 +46 19 38   0.2487  0.9750    79.2    86.3    23.8
...
2021 11 24    19 43 14.4 +47 15 19   0.1453  0.9841    84.5    87.0    22.7
...
2021 12 02    21 24 21.0 +43 16 27   0.09348 0.9959    93.4    81.3    21.6
...
2021 12 08    23 32 09.3 +27 27 14   0.06809 1.0075   107.3    69.0    20.5
2021 12 09    23 54 57.6 +22 59 19   0.06639 1.0097   110.1    66.4    20.3
2021 12 10    00 17 07.2 +18 09 42   0.06566 1.0119   112.6    64.0    20.2
...
2021 12 16    02 03 43.1 -08 38 39   0.08086 1.0265   119.6    56.5    20.5
...
2021 12 24    03 20 09.1 -24 43 51   0.1305  1.0489   116.8    56.8    21.6
...
2022 01 08    04 21 55.2 -31 32 00   0.2435  1.0981   112.0    56.1    23.0

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X173




More information about the Iaude mailing list