[Iaude] MPEC X109: 2021 XK2 [a=1.46,e=0.30,i=11.5,H=25.6]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun Dec 5 00:20:43 EST 2021


M.P.E.C. 2021-X109                             Issued 2021 December 5, 05:19 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 XK2                                    


Observations:
     K21X02K* C2021 12 03.24815303 13 12.15 -03 08 28.8          20.83GVEX109G96
     K21X02K  C2021 12 03.25367303 13 15.32 -03 09 09.9          21.27GVEX109G96
     K21X02K  C2021 12 03.25918203 13 18.58 -03 09 50.9          20.81GVEX109G96
     K21X02K  C2021 12 03.26469003 13 21.82 -03 10 32.1          20.90GVEX109G96
     K21X02K KC2021 12 03.36160203 14 18.64 -03 22 26.6                VEX109I52
     K21X02K KC2021 12 03.36412103 14 20.10 -03 22 45.4                VEX109I52
     K21X02K KC2021 12 03.36664003 14 21.64 -03 23 03.7          20.83GVEX109I52
     K21X02K |C2021 12 04.10078 03 21 55.20 -04 47 15.3          21.3 GVEX109807
     K21X02K |C2021 12 04.10699 03 21 58.54 -04 47 57.3          21.0 GVEX109807
     K21X02K |C2021 12 04.11323 03 22 01.88 -04 48 39.9          21.0 GVEX109807
     K21X02K |C2021 12 04.11947 03 22 05.29 -04 49 22.0          21.0 GVEX109807
     K21X02K  C2021 12 04.14732903 22 24.87 -04 54 50.0          20.6 GVEX109H01
     K21X02K  C2021 12 04.15239903 22 27.65 -04 55 24.4          21.1 GVEX109H01
     K21X02K  C2021 12 04.16510503 22 34.57 -04 56 50.4          21.0 GVEX109H01
     K21X02K KC2021 12 04.16846903 22 36.22 -04 57 15.2          20.9 GXEX109858
     K21X02K  C2021 12 04.16971403 22 37.07 -04 57 21.4          20.7 GVEX109H01
     K21X02K KC2021 12 04.17323303 22 38.81 -04 57 47.4          20.3 GXEX109858
     K21X02K KC2021 12 04.17805403 22 41.44 -04 58 20.2          20.8 GXEX109858
     K21X02K KC2021 12 05.16633403 31 54.58 -06 43 18.6                uEX109H21
     K21X02K KC2021 12 05.17398403 31 58.39 -06 44 04.6          21.4 VuEX109H21
     K21X02K KC2021 12 05.17807003 32 00.41 -06 44 29.5          21.1 VuEX109H21
     K21X02K KC2021 12 05.18911303 32 08.70 -06 45 23.5          20.90GVEX109I52
     K21X02K KC2021 12 05.19061503 32 09.43 -06 45 32.9          20.64GVEX109I52
     K21X02K KC2021 12 05.19211703 32 10.15 -06 45 41.4          21.41GVEX109I52
     K21X02K KC2021 12 05.19361903 32 10.92 -06 45 50.7          20.82GVEX109I52

Observer details:
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes, L.
    Horn.  1.00-m f/10.0 astrograph + CCD.
858 Tebbutt Observatory, Edgewood.  Observer F. B. Zoltowski.  0.51-m Schmidt-
    Cassegrain + 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.
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.  1.3-m f/4.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observers D. Rankin, D. C. Fuls.
    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 XK2                                                 Earth MOID = 0.0398 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  40.50181              (2000.0)            P               Q                  
n   0.55953387     Peri.  160.44846     +0.71217568     -0.67873026             
a   1.4585404      Node   243.64242     +0.61450806     +0.72619695             
e   0.3036614      Incl.   11.53978     +0.33939011     +0.10937652             
P   1.76           H   25.67          G   0.15           U   7                  
Residuals in seconds of arc
211203 G96  0.1+  0.1+    211204 807 (0.7-  0.1-)   211205 H21  0.2+  0.4+
211203 G96  0.6-  0.1+    211204 807  0.1-  0.1+    211205 H21  0.3+  0.4+
211203 G96  0.0   0.1+    211204 H01  0.0   0.0     211205 H21  0.2+  0.1+
211203 G96  0.4+  0.2-    211204 H01  0.0   0.1-    211205 I52  0.2+  0.1-
211203 I52  0.0   0.1+    211204 H01  0.0   0.0     211205 I52  0.0   0.5-
211203 I52  0.5-  0.2-    211204 858  0.3-  0.0     211205 I52  0.3-  0.1+
211203 I52  0.3+  0.1-    211204 H01  0.0   0.1+    211205 I52  0.1+  0.1-
211204 807  0.2+  0.2-    211204 858  0.3-  0.1-
211204 807  0.1-  0.1+    211204 858  0.0   0.3-

Ephemeris:
2021 XK2                 a,e,i = 1.46, 0.30, 12                  q = 1.0156
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 05    20 45 19.5 +41 14 47   0.1022  1.0164   101.1    73.2    23.3
...
2021 11 20    23 37 38.1 +32 52 21   0.05483 1.0202   124.5    52.9    21.4
...
2021 11 28    02 04 07.9 +10 41 09   0.05140 1.0301   146.9    31.5    20.6
...
2021 12 04    03 20 53.4 -04 36 39   0.06515 1.0408   146.8    31.2    21.2
2021 12 05    03 30 23.2 -06 24 52   0.06838 1.0429   145.9    32.0    21.3
2021 12 06    03 39 06.4 -08 01 22   0.07180 1.0450   145.0    32.8    21.4
...
2021 12 12    04 18 43.1 -14 28 25   0.09521 1.0593   140.0    36.7    22.2
...
2021 12 20    04 50 25.1 -17 59 25   0.1310  1.0819   136.0    39.2    23.0
...
2022 01 04    05 22 50.6 -18 14 58   0.2060  1.1336   132.9    39.5    24.1

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X109




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