[Iaude] MPEC X108: 2021 XH2 [a=2.23,e=0.68,i=17.8,H=19.7]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sat Dec 4 10:28:16 EST 2021


M.P.E.C. 2021-X108                             Issued 2021 December 4, 15:26 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 XH2                                    


Observations:
     K21X02H* C2021 12 02.57947409 14 13.69 +74 02 06.0          19.14oVEX108T08
     K21X02H  C2021 12 02.58234709 14 16.04 +74 02 09.8          18.98oVEX108T08
     K21X02H  C2021 12 02.58557709 14 18.84 +74 02 12.6          19.04oVEX108T08
     K21X02H  C2021 12 02.59350609 14 26.29 +74 02 23.4          19.05oVEX108T08
     K21X02H hC2021 12 02.76211309 17 05.11 +74 05 23.6          19.0 GVEX108J95
     K21X02H KC2021 12 02.78982409 17 31.87 +74 06 00.2          18.7 GVEX108J95
     K21X02H hC2021 12 02.79278709 17 34.58 +74 06 04.0          19.3 GVEX108J95
     K21X02H KC2021 12 02.88097709 19 00.50 +74 08 03.7          19.3 GVEX108587
     K21X02H KC2021 12 02.88169409 19 01.19 +74 08 04.4          19.1 GVEX108587
     K21X02H KC2021 12 02.88241109 19 01.91 +74 08 05.6          19.1 GVEX108587
     K21X02H KC2021 12 02.89069 09 19 09.24 +74 08 16.8          19.1 RVEX108B15
     K21X02H KC2021 12 02.89179 09 19 10.38 +74 08 18.6          19.1 RVEX108B15
     K21X02H KC2021 12 02.89288 09 19 11.43 +74 08 20.2          19.0 RVEX108B15
     K21X02H KC2021 12 02.89426 09 19 12.75 +74 08 21.8          19.0 RVEX108B15
     K21X02H 1C2021 12 02.89668 09 19 15.22 +74 08 24.9          20.4 VVEX108033
     K21X02H 1C2021 12 02.89697 09 19 15.45 +74 08 25.4          20.4 VVEX108033
     K21X02H 1C2021 12 02.89725 09 19 15.77 +74 08 25.7          20.3 VVEX108033
     K21X02H KC2021 12 03.05051 09 21 42.79 +74 11 45.0          19.1 GVEX108I93
     K21X02H KC2021 12 03.05588 09 21 47.97 +74 11 52.0          19.6 GVEX108I93
     K21X02H KC2021 12 03.06107 09 21 52.93 +74 11 58.7          19.4 GVEX108I93
     K21X02H 1C2021 12 03.22673 09 24 30.17 +74 15 17.1          20.1 VVEX108033
     K21X02H 1C2021 12 03.22702 09 24 30.31 +74 15 17.2          20.0 VVEX108033
     K21X02H 1C2021 12 03.22730 09 24 30.61 +74 15 17.9          20.0 VVEX108033
     K21X02H 1C2021 12 03.22774 09 24 31.05 +74 15 18.3          20.4 VVEX108033
     K21X02H mC2021 12 03.43602609 28 01.02 +74 19 23.5          19.34GVEX108I52
     K21X02H mC2021 12 03.43837609 28 03.38 +74 19 26.4          19.35GVEX108I52
     K21X02H mC2021 12 03.44072509 28 05.70 +74 19 28.7                VEX108I52
     K21X02H mC2021 12 03.44308609 28 07.90 +74 19 31.9          19.58GVEX108I52
     K21X02H 1C2021 12 03.76852 09 33 38.19 +74 24 53.2          20.8 VVEX108033
     K21X02H 1C2021 12 03.76881 09 33 38.54 +74 24 53.2          20.2 VVEX108033
     K21X02H 1C2021 12 03.80964 09 34 21.07 +74 25 38.1          20.5 VVEX108033
     K21X02H 1C2021 12 03.80992 09 34 21.47 +74 25 38.5          20.6 VVEX108033
     K21X02H 1C2021 12 03.81021 09 34 21.84 +74 25 38.7          20.5 VVEX108033
     K21X02H KC2021 12 03.83872509 34 51.91 +74 26 09.3          19.8 GVEX108104
     K21X02H KC2021 12 03.85376209 35 07.77 +74 26 26.5                VEX108104
     K21X02H KC2021 12 03.87256109 35 27.52 +74 26 47.0          19.9 GVEX108104
     K21X02H KC2021 12 03.87536 09 35 30.23 +74 26 47.2          19.4 GXEX108J57
     K21X02H KC2021 12 03.89766 09 35 53.41 +74 27 12.6          18.6 GXEX108J57
     K21X02H KC2021 12 03.92000 09 36 16.91 +74 27 36.4          19.5 GXEX108J57
     K21X02H KC2021 12 03.98317909 37 21.96 +74 28 50.6          19.5 GVEX108L01
     K21X02H KC2021 12 03.98474009 37 23.63 +74 28 52.4          19.6 GVEX108L01
     K21X02H KC2021 12 03.98630109 37 25.22 +74 28 54.2          19.5 GVEX108L01
     K21X02H KC2021 12 03.98786209 37 26.75 +74 28 55.9          19.6 GVEX108L01
     K21X02H KC2021 12 03.98942309 37 28.43 +74 28 57.3          19.6 GVEX108L01

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.
104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri.  Measurers
    P. Bacci, L. Tesi, G. Fagioli.  0.60-m reflector + CCD.
587 Sormano.  Observer E. Colzani.  Measurer P. Sicoli.  0.5-m f/6.8 reflector
    + CCD.
B15 Inastars Observatory, Potsdam (since 2006).  Observer B. Thinius.  0.36-m
    f/5.6 Schmidt-Cassegrain + 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.
I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
J57 Centro Astronomico Alto Turia, Valencia.  Observer A. Fornas.  Measurers
    A. Fornas, G. Fornas, E. Arce, V. Mas.  0.43-m f/6.8 reflector + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.41-m f/6.3 Schmidt-Cassegrain
    + CCD.
L01 Visnjan Observatory, Tican.  Observers K. Korlevic, M. Himelreich.
    Measurer K. Korlevic.  1.0-m f/2.9 reflector + CCD.
T08 ATLAS-MLO, Mauna Loa.  Observers L. Denneau, J. Tonry, H. Weiland.
    Measurers L. Denneau, J. Tonry, H. Weiland, A. Fitzsimmons, J. Robinson,
    N. Erasmus.  0.5-m reflector + CCD.

Orbital elements:
2021 XH2                                                 Earth MOID = 0.1522 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M 356.02004              (2000.0)            P               Q                  
n   0.29546494     Peri.  214.85927     -0.95090444     -0.20815673             
a   2.2325374      Node   311.39894     +0.30391763     -0.76779416             
e   0.6814125      Incl.   17.77704     -0.05843655     -0.60593969             
P   3.34           H   19.74          G   0.15           U   9                  
Residuals in seconds of arc
211202 T08  1.1+  0.3+    211202 033  0.1-  0.2+    211203 033  0.6-  0.1+
211202 T08  0.1+  0.3+    211202 033  0.1+  0.1+    211203 033  0.2-  0.2+
211202 T08  0.3-  1.2-    211203 I93  0.3-  0.1-    211203 033  0.1+  0.1+
211202 T08  1.0+  0.9-    211203 I93  0.0   0.1+    211203 104  0.5-  0.2-
211202 J95  0.1+  0.4-    211203 I93  0.1+  0.1+    211203 104  0.1+  0.1+
211202 J95  0.1+  0.1-    211203 033  0.5+  0.0     211203 104  0.7+  0.4-
211202 J95  0.6-  0.2-    211203 033  0.1-  0.2-    211203 J57  0.1+  0.1+
211202 587  0.0   0.4+    211203 033  0.0   0.1+    211203 J57  0.6-  0.6+
211202 587  0.0   0.1+    211203 033  0.1+  0.0     211203 J57  0.1-  0.6-
211202 587  0.2+  0.3+    211203 I52  0.2-  0.0     211203 L01  0.1-  0.1+
211202 B15  0.5-  0.3-    211203 I52  0.1+  0.2+    211203 L01  0.1+  0.3+
211202 B15  0.1-  0.1+    211203 I52  0.2+  0.3-    211203 L01  0.0   0.4+
211202 B15  0.1-  0.2+    211203 I52  0.1-  0.1+    211203 L01  0.3-  0.4+
211202 B15  0.1-  0.1-    211203 033  0.2-  0.6+    211203 L01  0.0   0.1+
211202 033  0.1+  0.1+    211203 033  0.0   0.3+

Ephemeris:
2021 XH2                 a,e,i = 2.23, 0.68, 18                  q = 0.7113
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 04    06 12 00.5 +60 15 43   0.7289  1.5011   120.7    34.6    21.4
...
2021 11 19    07 08 41.1 +67 15 58   0.5299  1.3448   121.7    38.7    20.5
...
2021 11 27    08 05 36.6 +71 28 10   0.4345  1.2597   119.7    42.9    20.1
...
2021 12 03    09 20 50.0 +74 10 37   0.3681  1.1955   116.3    47.7    19.8
2021 12 04    09 37 34.8 +74 29 04   0.3576  1.1848   115.6    48.6    19.7
2021 12 05    09 55 40.0 +74 43 10   0.3471  1.1740   114.8    49.7    19.6
...
2021 12 11    12 04 04.5 +73 41 35   0.2881  1.1099   108.4    57.3    19.3
...
2021 12 19    14 27 35.1 +62 25 38   0.2225  1.0256    94.5    73.0    19.1
...
2022 01 03    16 18 23.9 +12 20 56   0.1915  0.8778    51.8   118.4    20.6

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X108




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