[Iaude] MPEC X121: 2021 RA15 [a=2.52,e=0.56,i=18.9,H=18.5]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun Dec 5 10:04:59 EST 2021


M.P.E.C. 2021-X121                             Issued 2021 December 5, 15:03 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 RA15                                    


                           Revision to MPEC 2021-R321                           

Additional Observations:
     K21R15A  C2017 07 29.52600522 29 14.746+02 05 31.83         22.21GVEX121F51
     K21R15A  C2017 07 29.53982122 29 14.236+02 05 27.61         22.28GVEX121F51
     K21R15A  C2017 07 29.55309422 29 13.718+02 05 24.05         22.32GVEX121F51
     K21R15A  C2017 09 11.36411721 49 29.635-04 17 27.92         22.45GVEX121F51
     K21R15A  C2017 09 11.37774821 49 28.875-04 17 36.67         22.14GVEX121F51
     K21R15A  C2017 10 11.27704821 30 22.133-09 24 39.70         22.52GVEX121F51
     K21R15A  C2017 10 11.28937621 30 21.910-09 24 46.21         22.52GVEX121F51
     K21R15A  C2017 10 11.30172421 30 21.696-09 24 52.21         23.26GVEX121F51
     K21R15A  C2017 10 11.31403921 30 21.507-09 24 58.18         22.60GVEX121F51
     K21R15A  C2017 11 07.21177521 34 09.155-12 07 09.58         22.90GVEX121F51
     K21R15A  C2017 11 07.22354221 34 09.498-12 07 12.11         22.34GVEX121F51
     K21R15A  C2017 11 07.24706821 34 10.210-12 07 17.16         22.01GVEX121F51
     K21R15A  C2019 06 09.44724616 35 56.109+04 34 39.02         23.44GVEX121F51
     K21R15A  C2019 06 09.45989816 35 55.361+04 34 39.51         23.44GVEX121F51
     K21R15A  C2019 06 09.47259716 35 54.616+04 34 39.14         24.46GVEX121F51
     K21R15A  C2019 06 10.48320516 34 56.891+04 34 43.08         23.43GVEX121F51
     K21R15A  C2019 06 10.49685316 34 56.102+04 34 43.16         23.10GVEX121F51
     K21R15A  C2019 06 10.51045516 34 55.328+04 34 42.83         23.51GVEX121F51
     K21R15A  C2019 06 10.52413216 34 54.542+04 34 42.91         23.31GVEX121F51

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, I. Smith.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
    Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
170729 F51  5.4-  0.0-    190610 F51 56.7- 27.1-    MPO660780   +1462 days

Orbital elements:
2021 RA15                                                Earth MOID = 0.2601 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M 324.24999              (2000.0)            P               Q                  
n   0.24611288     Peri.  295.44076     -0.28578869     -0.95686742             
a   2.5218146      Node   170.69739     +0.95354223     -0.28937083             
e   0.5619879      Incl.   18.85671     +0.09529978     +0.02587018             
P   4.00           H   18.55          G   0.15           U   1                  
Residuals in seconds of arc
170729 F51  0.3-  0.2+    190609 F51  0.0   0.2-    210911 291  0.5-  0.2-
170729 F51  0.0   0.2-    190610 F51  0.1-  0.0     210912 291  0.2-  0.1-
170729 F51  0.1-  0.0     190610 F51  0.1-  0.1+    210912 291  0.2-  0.1-
170911 F51  0.3-  0.2-    190610 F51  0.1+  0.2-    210912 291  0.0   0.1+
170911 F51  0.3+  0.3+    190610 F51  0.2+  0.0     210914 291  0.3+  0.1+
171011 F51  0.2+  0.1+    210908 F52  0.2+  0.0     210914 291  0.4-  0.1+
171011 F51  0.0   0.2-    210908 F52  0.0   0.1+    210914 291  0.1-  0.1+
171011 F51  0.1-  0.0     210908 F52  0.1+  0.1-    210926 807  0.0   0.4-
171011 F51  0.2+  0.3+    210908 F52  0.1-  0.1+    210926 807  0.0   0.5-
171107 F51  0.0   0.0     210909 H21  0.1+  0.3-    210926 807  0.1-  0.0
171107 F51  0.1-  0.0     210909 H21  0.1-  0.0     211003 807  0.0   0.2+
171107 F51  0.2+  0.0     210909 H21  0.1+  0.3-    211003 807  0.1+  0.2-
190609 F51  0.0   0.0     210909 H21  0.1+  0.5-    211003 807 (0.3+  0.9-)
190609 F51  0.1-  0.3+    210911 291  0.1+  0.1+

Ephemeris:
2021 RA15                a,e,i = 2.52, 0.56, 19                  q = 1.1046
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 05    21 31 32.4 -12 13 34   2.0880  2.4441    98.8    23.6    23.2
...
2021 11 20    21 41 16.7 -12 51 48   2.2053  2.3484    85.7    24.8    23.3
...
2021 11 28    21 48 35.8 -12 57 09   2.2646  2.2960    79.3    25.0    23.3
...
2021 12 04    21 54 57.6 -12 54 39   2.3064  2.2562    74.7    24.9    23.3
2021 12 05    21 56 05.3 -12 53 43   2.3131  2.2495    73.9    24.9    23.3
2021 12 06    21 57 14.2 -12 52 37   2.3197  2.2428    73.2    24.9    23.3
...
2021 12 12    22 04 30.9 -12 42 59   2.3575  2.2022    68.8    24.6    23.3
...
2021 12 20    22 15 11.0 -12 22 15   2.4025  2.1475    63.2    24.1    23.2
...
2022 01 04    22 37 53.1 -11 20 25   2.4677  2.0427    53.5    22.8    23.1

A. U. Tomatic                (C) Copyright 2021 MPC           M.P.E.C. 2021-X121




More information about the Iaude mailing list