[Iaude] MPEC E89: 2021 LR44 [a=39.45,e=0.18,i=7.4,H=8.54]

[mpec at cfa.harvard.edu]

M.P.E.C. 2024-E89                                 Issued 2024 March 6, 19:41 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 LR44                                    


Additional Observations:
     K21L44R 3C2022 10 20.21696 19 13 02.564-21 31 06.26         23.7 VVEE089266
     K21L44R 3C2022 10 20.26058 19 13 02.659-21 31 06.21         23.7 VVEE089266
     K21L44R 3C2022 10 20.29842 19 13 02.742-21 31 06.17         23.7 VVEE089266
     K21L44R 3C2022 10 21.20926 19 13 04.853-21 31 05.44         23.8 VVEE089266
     K21L44R 3C2022 10 21.25420 19 13 04.956-21 31 05.39         23.8 VVEE089266
     K21L44R 3C2022 10 21.29846 19 13 05.057-21 31 05.34         23.8 VVEE089266
     K21L44R 3C2022 10 23.20599 19 13 09.776-21 31 03.19         23.9 VVEE089266
     K21L44R 3C2022 10 23.25093 19 13 09.889-21 31 03.12         23.9 VVEE089266
     K21L44R 3C2022 10 23.29489 19 13 09.999-21 31 03.05         23.9 VVEE089266

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  2.0-  0.4-    221023 266  2.0-  0.3-    MPO735709   -47.6 days

Orbital elements:
2021 LR44                                                                       
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Alexandersen            
M 289.59445              (2000.0)            P               Q                  
n   0.00397761     Peri.  266.05161     +0.92542950     -0.36075668             
a  39.4506653      Node   115.06357     +0.37810775     +0.85916538             
e   0.1767327      Incl.    7.35158     +0.02479477     +0.36289045             
P 248              H    8.54          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
210705 266  0.0   0.0     221020 266  0.0   0.0     221023 266  0.0   0.0
210705 266  0.0   0.0     221020 266  0.0   0.0     221023 266  0.0   0.0
210705 266  0.0   0.0     221020 266  0.0   0.0     221023 266  0.0   0.0

Ephemeris:
2021 LR44                a,e,i = 39.45, 0.18, 7                  q = 32.4784
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2024 02 05    19 30 14.1 -21 13 09  39.2096 38.3138    24.4     0.6    24.5
...
2024 02 20    19 31 52.8 -21 09 55  39.0678 38.3064    39.2     0.9    24.6
...
2024 02 28    19 32 39.5 -21 08 22  38.9707 38.3025    47.0     1.1    24.6
...
2024 03 05    19 33 11.2 -21 07 19  38.8894 38.2996    52.9     1.2    24.6
2024 03 06    19 33 16.2 -21 07 09  38.8752 38.2991    53.9     1.2    24.6
2024 03 07    19 33 21.2 -21 06 59  38.8608 38.2986    54.9     1.2    24.6
...
2024 03 13    19 33 48.7 -21 06 04  38.7711 38.2956    60.8     1.3    24.6
...
2024 03 21    19 34 20.0 -21 05 02  38.6437 38.2917    68.6     1.4    24.6
...
2024 04 05    19 35 01.1 -21 03 44  38.3884 38.2843    83.3     1.5    24.6

M. P. C. Staff               (C) Copyright 2024 MPC           M.P.E.C. 2024-E89