[Iaude] MPEC U91: 2021 PR16 [a=1.11,e=0.08,i=1.3,H=26.53]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Wed Oct 18 16:22:46 EDT 2023


M.P.E.C. 2023-U91                              Issued 2023 October 18, 20:21 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 PR16                                    


                           Revision to MPEC 2021-P180                           

Additional Observations:
     K21P16R  C2014 09 18.39705 22 58 08.470-17 37 43.92         20.8 wLEU091F51
     K21P16R  C2014 09 18.40824 22 58 06.928-17 37 33.31         20.9 wLEU091F51
     K21P16R 1C2014 10 03.20704 22 46 24.06 -11 41 24.0          20.6 VqEU091G96
     K21P16R 1C2014 10 03.21708 22 46 23.08 -11 41 05.6          19.9 VqEU091G96
     K21P16R 1C2014 10 03.22710 22 46 22.14 -11 40 45.6          20.5 VqEU091G96
     K21P16R 1C2014 10 03.23715 22 46 21.26 -11 40 25.9          21.8 VqEU091G96

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers N. Primak, A. Schultz, T. Goggia, M.
    Willman.  Measurers B. Bolin, K. Chambers, S. Chastel, L. Denneau, H.
    Flewelling, M. Huber, E. Magnier, E. Schunova, R. Wainscoat, C. Waters.
    1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observer R. A. Kowalski.  Measurers E. J. Christensen,
    A. R. Gibbs, A. D. Grauer, R. E. Hill, J. A. Johnson, R. A. Kowalski, S.
    M. Larson, F. C. Shelly.  1.5-m reflector + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
140918 F51 0.10+ 0.03+    141003 G96 0.10+ 0.04+    E2021-V05   -0.00 days

Orbital elements:
2021 PR16                                                Earth MOID = 0.0296 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
M 200.20645              (2000.0)            P               Q                  
n   0.84114917     Peri.   36.54505     +0.64099606     -0.76752486             
a   1.1114434      Node    13.59162     +0.69860606     +0.58047093             
e   0.0826788      Incl.    1.32770     +0.31792077     +0.27195422             
P   1.17           H   26.53          G   0.15           U   1                  
Residuals in seconds of arc
140918 F51  0.0   0.1-    210815 F51  0.3-  0.2-    210829 807  0.0   0.1+
140918 F51  0.1+  0.1-    210815 F51  0.2+  0.0     210831 F52  0.1-  0.2+
141003 G96  0.2-  0.7+    210815 F51  0.3-  0.0     210831 F52  0.2-  0.0
141003 G96  0.5-  0.2-    210816 F51  0.0   0.0     210831 F52  0.0   0.1+
141003 G96  0.3-  0.3+    210816 F51  0.0   0.0     210907 F52  0.1+  0.0
141003 G96  0.9+  0.4+    210816 F51  0.1-  0.0     210907 F52  0.0   0.0
210809 F51  0.0   0.1-    210816 F51  0.1-  0.0     210907 F52  0.0   0.0
210809 F51  0.0   0.1-    210816 F51  0.1-  0.0     210925 807  0.1+  0.1+
210809 F51  0.0   0.0     210816 F51  0.2-  0.2+    210925 807  0.7-  0.3-
210810 568  0.0   0.0     210818 F51  0.1+  0.0     210925 807  0.3-  0.8-
210810 568  0.1+  0.0     210818 F51  0.1+  0.0     211101 291  0.1-  0.1+
210810 568  0.0   0.0     210818 F51  0.1-  0.0     211101 291  0.4+  0.2+
210815 F51  0.2+  0.0     210829 807  0.0   0.2-    211101 291  0.0   0.1+
210815 F51  0.1+  0.0     210829 807  0.1+  0.1+

Ephemeris:
2021 PR16                a,e,i = 1.11, 0.08, 1                   q = 1.0196
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 09 18    14 16 12.3 -14 27 45   1.7334  1.1963    42.1    34.3    29.5
...
2023 10 03    15 05 45.3 -18 18 11   1.7659  1.1873    39.9    32.8    29.5
...
2023 10 11    15 33 12.3 -20 02 24   1.7809  1.1811    38.8    32.0    29.5
...
2023 10 17    15 54 17.6 -21 10 30   1.7909  1.1759    37.9    31.4    29.5
2023 10 18    15 57 50.9 -21 20 57   1.7925  1.1750    37.7    31.3    29.5
2023 10 19    16 01 25.0 -21 31 08   1.7941  1.1741    37.6    31.2    29.5
...
2023 10 25    16 23 03.7 -22 26 18   1.8028  1.1683    36.7    30.6    29.5
...
2023 11 02    16 52 31.2 -23 23 13   1.8129  1.1598    35.6    29.9    29.4
...
2023 11 17    17 49 19.5 -24 13 31   1.8274  1.1423    33.5    28.6    29.4

A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-U91




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