[Iaude] MPEC J218: 2021 LR6 [a=2.10,e=0.50,i=6.7,H=22.41]

mpec at cfa.harvard.edu mpec at cfa.harvard.edu
Thu May 9 07:47:27 EDT 2024


M.P.E.C. 2024-J218                                  Issued 2024 May 9, 11:46 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets, routine data on comets and natural satellites,
         and occasional editorial announcements.  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 LR6                                    


                           Revision to MPEC 2021-L164                           

Additional Observations:
     K21L06R  C2024 05 01.44976515 11 55.614-09 26 59.19         21.63wXEJ218F51
     K21L06R  C2024 05 01.46100615 11 54.974-09 27 01.61         21.70wXEJ218F51
     K21L06R  C2024 05 01.48349415 11 53.613-09 27 06.27         21.67wXEJ218F51
     K21L06R  C2024 05 07.51795915 05 51.521-09 53 45.19         21.27wXEJ218F51
     K21L06R  C2024 05 07.52989515 05 50.610-09 53 48.88         21.39wXEJ218F51
     K21L06R  C2024 05 07.54187315 05 49.707-09 53 53.05         21.14wXEJ218F51
     K21L06R  C2024 05 07.55637815 05 48.630-09 53 57.11         21.85wXEJ218F51
     K21L06R 1C2024 05 08.33784115 04 54.800-09 58 26.94         21.48GVEJ218G96
     K21L06R 1C2024 05 08.34301915 04 54.440-09 58 28.45         21.24GVEJ218G96
     K21L06R 1C2024 05 08.34820015 04 54.008-09 58 30.00         21.39GVEJ218G96
     K21L06R 1C2024 05 08.35336015 04 53.641-09 58 31.40         21.25GVEJ218G96

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Herman, T. Lowe, P. Minguez, A.
    Schultz, I. Smith.  Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
    Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
    Weryk.  1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observer J. K. Hogan.  Measurers T. Beuden, V. F.
    Carvajal, D. Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H.
    Groeller, J. K. Hogan, 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.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
240501 F51   13-    4-    240508 G96   16-    5-    E2024-EH9   -6.38 days

Orbital elements:
2021 LR6                                                 Earth MOID = 0.0895 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Veres                   
M 321.58525              (2000.0)            P               Q                  
n   0.32408508     Peri.  237.50527     +0.51922615     +0.84811817             
a   2.0990850      Node    64.12573     -0.73957578     +0.50767235             
e   0.5021085      Incl.    6.72440     -0.42828947     +0.15153994             
P   3.04           H   22.41          G   0.15           U   2                  
Residuals in seconds of arc
210612 F51  0.1-  0.1+    210614 807  0.1+  0.2+    240507 F51  0.0   0.0
210612 F51  0.1-  0.1+    210614 807  0.1+  0.3+    240507 F51  0.0   0.1+
210612 F51  0.2+  0.1+    210614 474  0.0   0.0     240507 F51  0.2+  0.3-
210613 568  0.0   0.0     210614 474  0.4-  0.1-    240507 F51  0.5+  0.2+
210613 568  0.1+  0.0     210614 474  0.1-  0.1-    240508 G96  0.9-  0.7-
210613 568  0.0   0.0     240501 F51  0.2-  0.1+    240508 G96  0.2-  0.4-
210613 568  0.0   0.0     240501 F51  0.2+  0.0     240508 G96  0.5-  0.2-
210614 807  0.1+  0.1-    240501 F51  0.2-  0.0     240508 G96  0.1+  0.2+

Ephemeris:
2021 LR6                 a,e,i = 2.10, 0.50, 7                   q = 1.0451
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2024 04 09    15 19 29.1 -08 52 13   0.6388  1.5809   148.3    19.5    23.4
...
2024 04 24    15 16 55.8 -09 07 27   0.4874  1.4777   162.4    11.9    22.4
...
2024 05 02    15 11 27.1 -09 28 46   0.4202  1.4233   169.8     7.2    21.8
...
2024 05 08    15 05 18.9 -09 56 14   0.3760  1.3832   172.8     5.3    21.4
2024 05 09    15 04 07.7 -10 02 05   0.3692  1.3765   172.7     5.4    21.4
2024 05 10    15 02 53.8 -10 08 22   0.3625  1.3699   172.4     5.6    21.3
...
2024 05 16    14 54 37.5 -10 55 56   0.3252  1.3308   167.9     9.2    21.2
...
2024 05 24    14 41 38.4 -12 31 41   0.2829  1.2804   158.7    16.7    21.1
...
2024 06 08    14 14 14.3 -17 45 26   0.2225  1.1935   139.7    33.3    20.9

A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-J218





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