[Iaude] MPEC X225: 2019 AR4 [a=2.15,e=0.54,i=4.5,H=21.2]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Tue Dec 14 09:06:31 EST 2021


M.P.E.C. 2021-X225                            Issued 2021 December 14, 14:05 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

                                    2019 AR4                                    


                           Revision to MPEC 2019-A104                           

Additional Observations:
     K19A04R KC2021 12 12.30697305 22 06.78 +17 25 49.4          22.59GVEX225V06
     K19A04R KC2021 12 12.31332505 22 06.40 +17 25 49.5                VEX225V06
     K19A04R KC2021 12 12.31967905 22 05.50 +17 25 49.6          22.08GVEX225V06
     K19A04R KC2021 12 12.32603505 22 04.83 +17 25 49.4          22.62GVEX225V06
     K19A04R KC2021 12 13.25524805 20 32.67 +17 25 39.1          22.15GVEX225V06
     K19A04R KC2021 12 13.26160005 20 32.00 +17 25 39.1          22.04GVEX225V06
     K19A04R KC2021 12 13.26795105 20 31.33 +17 25 39.0          22.28GVEX225V06
     K19A04R KC2021 12 13.27430205 20 30.69 +17 25 38.7          22.13GVEX225V06

Observer details:
V06 Catalina Sky Survey-Kuiper.  Observer 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.  1.55-m reflector + 1K CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
211212 V06 0.14- 0.01-    211213 V06 0.14- 0.01-    MPO477910   +1149 days

Orbital elements:
2019 AR4                                                 Earth MOID = 0.0673 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M 326.22849              (2000.0)            P               Q                  
n   0.31309567     Peri.   73.01662     -0.98120662     +0.17980337             
a   2.1479195      Node   117.29467     -0.19295410     -0.91143856             
e   0.5368551      Incl.    4.51988     -0.00150905     -0.37006824             
P   3.15           H   21.25          G   0.15           U   0                  
Residuals in seconds of arc
190103 F51  0.1+  0.0     190209 703  0.5+  0.1+    190429 807  0.1+  0.4+
190103 F51  0.1+  0.0     190209 703  0.0   0.4+    190429 807  0.1-  0.2+
190103 F51  0.0   0.0     190209 703  0.6+  0.1+    190429 807  0.5-  0.2-
190103 F51  0.2+  0.1+    190212 703  0.5-  0.5-    190501 691  0.2-  0.3-
190104 568  0.0   0.0     190212 703  1.0-  0.2+    190501 691  0.5-  0.3+
190104 568  0.0   0.0     190212 703  0.4-  0.1+    190501 691  0.3+  0.2-
190104 568  0.1-  0.0     190212 G96  0.0   0.0     190530 V06  0.3+  0.0
190106 568  0.1+  0.0     190212 G96  0.2+  0.0     190530 V06  0.1+  0.1+
190106 568  0.0   0.0     190212 G96  0.1+  0.5-    190530 V06 (1.1+  0.7+)
190106 568  0.0   0.0     190212 G96  0.0   0.0     190530 V06  0.2+  0.5+
190107 L01  0.3+  0.0     190227 C51  0.2-  0.8-    190530 F51  0.1+  0.2+
190107 L01  0.0   0.5+    190227 C51  0.9-  0.5-    190530 F51  0.1-  0.1+
190107 L01  0.0   0.2+    190227 C51  0.1-  0.1+    190623 807 (0.9+  0.8-)
190109 807  0.1-  0.5-    190227 C51  1.3-  0.8+    190623 807 (0.5+  0.8-)
190109 807  0.0   0.2-    190228 C51  0.0   0.1-    190623 807 (0.7+  0.6-)
190109 807  0.2+  0.1+    190228 C51  0.6+  0.3+    190628 V06  0.0   0.2-
190119 G96  0.1-  0.0     190228 C51  0.6+  0.1+    190628 V06  0.0   0.0
190119 G96  0.1-  0.4-    190228 C51  1.3-  1.2+    190628 V06  0.2-  0.1-
190119 G96 (0.8+  0.5-)   190228 C51  0.3-  0.0     190628 V06  0.3+  0.1-
190119 G96  0.4-  0.2+    190301 711  0.0   0.1-    211212 V06  0.0   0.3-
190119 I52 (0.5-  0.9-)   190301 711  0.5+  0.1+    211212 V06 (3.9+  0.0 )
190119 I52 (0.3+  1.0-)   190301 711  0.1-  0.0     211212 V06  0.3+  0.1+
190119 I52  0.1-  0.7+    190405 T12  0.0   0.0     211212 V06  0.1-  0.0
190119 I52  0.5-  0.7+    190405 T12  0.1-  0.0     211213 V06  0.1+  0.1+
190201 711  0.9+  0.3+    190405 T12  0.0   0.0     211213 V06  0.1-  0.2+
190201 711  0.6+  0.2+    190428 807  0.2-  0.2-    211213 V06  0.3-  0.1+
190201 711  0.7+  0.1-    190428 807  0.2+  0.1-    211213 V06  0.1-  0.2-

Ephemeris:
2019 AR4                 a,e,i = 2.15, 0.54, 5                   q = 0.9948
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 14    05 53 00.8 +17 47 28   1.1852  2.0622   142.8    16.8    24.1
...
2021 11 29    05 40 56.2 +17 32 25   1.0047  1.9621   160.4     9.7    23.4
...
2021 12 07    05 30 24.8 +17 27 36   0.9290  1.9071   170.0     5.1    22.9
...
2021 12 13    05 20 58.1 +17 25 44   0.8829  1.8651   174.3     3.0    22.6
2021 12 14    05 19 17.6 +17 25 35   0.8762  1.8581   174.1     3.1    22.6
2021 12 15    05 17 35.6 +17 25 29   0.8696  1.8510   173.6     3.4    22.6
...
2021 12 21    05 07 01.8 +17 25 56   0.8360  1.8084   167.1     7.0    22.7
...
2021 12 29    04 52 40.5 +17 29 55   0.8053  1.7507   156.2    13.1    22.8
...
2022 01 13    04 29 28.8 +17 53 03   0.7850  1.6406   135.9    24.7    22.9

A. U. Tomatic                (C) Copyright 2021 MPC           M.P.E.C. 2021-X225




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