[Iaude] MPEC B101: 2021 PL1 [a=1.50,e=0.22,i=29.0,H=21.95]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2024-B101                             Issued 2024 January 23, 14:29 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 PL1                                    


                           Revision to MPEC 2021-P48                            

Additional Observations:
     K21P01L  C2024 01 20.51230410 08 40.293+00 05 59.03         21.98GVEB101F51
     K21P01L  C2024 01 20.53474010 08 39.033+00 06 53.23         22.12GVEB101F51
     K21P01L  C2024 01 21.56177210 07 44.261+00 48 47.07         22.07GVEB101F51
     K21P01L  C2024 01 21.57444310 07 43.506+00 49 18.19         22.33GVEB101F51

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.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
240120 F51 0.14+ 0.04+    240121 F51 0.14+ 0.04+    MPO782768   +0.09 days

Orbital elements:
2021 PL1                                                 Earth MOID = 0.2719 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
M   9.82374              (2000.0)            P               Q                  
n   0.53729434     Peri.  246.25556     +0.82295819     -0.47487134             
a   1.4985154      Node   139.99999     +0.50173394     +0.86499465             
e   0.2236775      Incl.   29.02027     -0.26646364     +0.16211562             
P   1.83           H   21.95          G   0.15           U   2                  
Residuals in seconds of arc
210731 F51  0.3+  0.4-    210805 H21  0.5-  0.2+    210814 474  0.2-  0.0
210731 F51  0.2+  0.1-    210805 H21  0.1+  0.1-    210814 474  0.3-  0.1-
210731 F51  0.2+  0.1-    210805 H21  0.6-  0.2+    210926 807  0.1-  0.2+
210731 F51  0.2+  0.1+    210805 F51  0.0   0.2-    210926 807  0.0   0.0
210804 F51  0.1+  0.2+    210805 F51  0.1-  0.3-    210926 807  0.2+  0.2-
210804 F51  0.1+  0.2+    210805 F51  0.0   0.0     240120 F51  0.1-  0.0
210804 F51  0.0   0.2+    210806 033  0.0   0.6+    240120 F51  0.3+  0.0
210804 F51  0.2+  0.1+    210806 033  0.1-  0.2+    240121 F51  0.2-  0.3+
210804 F51  0.2+  0.2-    210806 033  0.2-  0.2+    240121 F51  0.0   0.0

Ephemeris:
2021 PL1                 a,e,i = 1.50, 0.22, 29                  q = 1.1633
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 12 24    10 12 40.9 -12 22 46   0.7460  1.4238   110.1    40.5    23.7
...
2024 01 08    10 15 21.6 -07 03 05   0.6563  1.4720   126.6    32.5    23.2
...
2024 01 16    10 12 02.1 -02 46 30   0.6172  1.4973   137.4    26.4    23.0
...
2024 01 22    10 07 20.3 +01 06 59   0.5953  1.5160   146.4    21.1    22.8
2024 01 23    10 06 23.0 +01 48 59   0.5924  1.5191   148.0    20.1    22.7
2024 01 24    10 05 22.9 +02 31 47   0.5897  1.5222   149.5    19.1    22.7
...
2024 01 30    09 58 28.4 +07 02 28   0.5791  1.5406   159.4    13.0    22.5
...
2024 02 07    09 47 25.1 +13 22 27   0.5812  1.5645   172.8     4.5    22.1
...
2024 02 22    09 25 44.5 +24 11 05   0.6385  1.6075   161.6    11.2    22.7

A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-B101