[Iaude] MPEC E91: 2021 LW44 [a=43.91,e=0.07,i=2.4,H=7.63]

[mpec at cfa.harvard.edu]

M.P.E.C. 2024-E91                                 Issued 2024 March 6, 19:45 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 LW44                                    


Additional Observations:
     K21L44W 3C2022 10 20.21696 19 11 09.832-21 03 35.64         23.6 VVEE091266
     K21L44W 3C2022 10 20.26058 19 11 09.911-21 03 35.59         23.6 VVEE091266
     K21L44W 3C2022 10 20.29842 19 11 09.980-21 03 35.54         23.6 VVEE091266
     K21L44W 3C2022 10 21.20926 19 11 11.741-21 03 34.61         23.4 VVEE091266
     K21L44W 3C2022 10 21.25420 19 11 11.826-21 03 34.55         23.4 VVEE091266
     K21L44W 3C2022 10 21.29846 19 11 11.911-21 03 34.48         23.4 VVEE091266
     K21L44W 3C2022 10 23.20599 19 11 15.860-21 03 32.00         23.5 VVEE091266
     K21L44W 3C2022 10 23.25093 19 11 15.954-21 03 31.92         23.5 VVEE091266
     K21L44W 3C2022 10 23.29489 19 11 16.046-21 03 31.84         23.5 VVEE091266

Observer details:
266 New Horizons KBO Search-Subaru.  Observers S. Benecchi, A. Verbiscer, T.
    Ito.  Measurers S. B. Porter, W. E. Fraser, J. J. Kavelaars, L. Peltier.
    8.2mn Subaru Telescope + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
221020 266 39.9-  4.9-    221023 266 40.2-  5.0-    MPO735709   -4273 days

Orbital elements:
2021 LW44                                                                       
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Alexandersen            
M 249.23147              (2000.0)            P               Q                  
n   0.00338687     Peri.  264.99523     +0.67977476     -0.73296180             
a  43.9140379      Node   142.13600     +0.68854191     +0.62559314             
e   0.0662602      Incl.    2.42285     +0.25261889     +0.26720820             
P 291              H    7.63          G   0.15           U   8                  
Residuals in seconds of arc
210609 266  0.0   0.0     210906 266  0.0   0.0     221021 266  0.0   0.0
210609 266  0.0   0.0     210906 266  0.0   0.0     221021 266  0.0   0.0
210609 266  0.0   0.0     210906 266  0.0   0.0     221021 266  0.0   0.0
210617 266  0.0   0.0     221020 266  0.0   0.0     221023 266  0.0   0.0
210617 266  0.0   0.0     221020 266  0.0   0.0     221023 266  0.0   0.0
210617 266  0.0   0.0     221020 266  0.0   0.0     221023 266  0.0   0.0

Ephemeris:
2021 LW44                a,e,i = 43.91, 0.07, 2                  q = 41.0043
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2024 02 05    19 25 11.1 -20 41 40  46.0045 45.1167    25.5     0.5    24.3
...
2024 02 20    19 26 32.7 -20 38 44  45.8635 45.1144    40.3     0.8    24.3
...
2024 02 28    19 27 11.0 -20 37 17  45.7669 45.1132    48.2     0.9    24.4
...
2024 03 05    19 27 36.9 -20 36 17  45.6861 45.1122    54.1     1.0    24.4
2024 03 06    19 27 40.9 -20 36 07  45.6721 45.1121    55.1     1.0    24.4
2024 03 07    19 27 44.9 -20 35 58  45.6578 45.1119    56.1     1.0    24.4
...
2024 03 13    19 28 07.1 -20 35 04  45.5689 45.1110    62.0     1.1    24.4
...
2024 03 21    19 28 32.0 -20 34 02  45.4428 45.1098    69.9     1.2    24.4
...
2024 04 05    19 29 03.6 -20 32 35  45.1910 45.1075    84.6     1.3    24.4

M. P. C. Staff               (C) Copyright 2024 MPC           M.P.E.C. 2024-E91