[Iaude] MPEC J12: 2020 HX9 [a=1.22,e=0.32,i=16.2,H=23.37]

mpec at cfa.harvard.edu mpec at cfa.harvard.edu
Wed May 1 10:14:37 EDT 2024


M.P.E.C. 2024-J12                                   Issued 2024 May 1, 14:13 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

                                    2020 HX9                                    


                           Revision to MPEC 2020-J08                            

Additional Observations:
     K20H09X  C2011 10 19.48687902 45 38.940+37 20 04.22         20.75GVEJ012F51
     K20H09X  C2011 10 19.49916502 45 39.762+37 19 32.25         21.50GVEJ012F51
     K20H09X  C2011 10 25.59557702 56 23.267+31 02 41.31         19.39GVEJ012F51
     K20H09X KC2024 04 30.20994810 31 56.327-02 47 55.82         21.60GVEJ012I52
     K20H09X KC2024 04 30.21157610 31 57.292-02 47 47.58         20.36GVEJ012I52
     K20H09X KC2024 04 30.21320110 31 58.296-02 47 40.60         20.41GVEJ012I52
     K20H09X KC2024 04 30.21483510 31 59.315-02 47 32.89               VEJ012I52
     K20H09X  C2024 05 01.27472910 42 55.041-01 29 53.09         20.83wXEJ012F51
     K20H09X  C2024 05 01.29712510 43 07.948-01 28 18.07         20.62wXEJ012F51
     K20H09X  C2024 05 01.30829310 43 14.392-01 27 30.72         21.28wXEJ012F51

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.
I52 Steward Observatory, Mt. Lemmon Station.  Observers V. F. Carvajal, G. J.
    Leonard.  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.  1.0-m prime focus + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
111019 F51 3.49- 0.06-    240501 F51 1.65- 0.29-    E2023-P50   +0.32 days

Orbital elements:
2020 HX9                                                 Earth MOID = 0.0567 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Veres                   
M  30.67655              (2000.0)            P               Q                  
n   0.73258417     Peri.  266.50912     -0.55144474     -0.81582905             
a   1.2187025      Node   218.67180     +0.83222124     -0.52359435             
e   0.3172222      Incl.   16.18376     +0.05758901     -0.24550339             
P   1.35           H   23.37          G   0.15           U   0                  
Residuals in seconds of arc
111019 F51  0.1+  0.0     200430 F51  0.0   0.4+    200504 I52  1.0-  0.0
111019 F51  0.0   0.0     200430 F51  0.1+  0.0     200504 I52  0.2-  0.1+
111025 F51  0.1-  0.2-    200501 I52  0.1+  0.7-    200512 F51  0.2+  0.0
200428 F51  0.2+  0.1+    200501 I52  0.2-  0.5+    200512 F51  0.1+  0.3+
200428 F51  0.2-  0.5+    200501 I52  0.2+  0.1+    200512 F51  0.0   0.1+
200428 F51  0.1+  0.1+    200501 F51  0.1+  0.1-    200513 I52  0.1+  0.1-
200429 I52  0.2+  0.7+    200501 F51  0.1+  0.0     200513 I52  0.2-  0.1+
200429 I52  0.0   0.3+    200501 F51  0.1+  0.0     200513 I52  0.6-  0.6-
200429 I52  0.1-  0.1+    200501 F51  0.0   0.0     200529 F51  0.1+  0.1-
200429 474  0.2-  0.2-    200501 F51  0.3+  0.0     240430 I52  0.4+  0.8-
200429 474  0.3-  0.2-    200501 F51  0.1-  0.1+    240430 I52  0.2-  0.1+
200429 474  0.6+  0.2+    200503 G96  0.2-  0.0     240430 I52  0.1-  0.3-
200429 474  0.9+  0.2+    200503 G96  0.1-  0.1+    240430 I52  0.1+  0.0
200430 I52  0.2-  0.6-    200503 G96  0.3+  0.1-    240501 F51  0.1-  0.1+
200430 I52  0.6-  0.7-    200504 I52  0.2+  0.0     240501 F51  0.1-  0.1+
200430 I52  0.0   0.5-    200504 I52  0.3+  0.2-    240501 F51  0.0   0.1+

Ephemeris:
2020 HX9                 a,e,i = 1.22, 0.32, 16                  q = 0.8321
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2024 04 01    04 48 41.6 -27 06 21   0.1984  0.9408    67.3   101.4    23.4
...
2024 04 16    07 21 40.4 -22 01 36   0.1303  1.0125    90.3    82.3    21.9
...
2024 04 24    09 15 56.7 -11 38 03   0.1252  1.0534   109.2    64.4    21.3
...
2024 04 30    10 29 43.3 -03 03 19   0.1415  1.0846   119.8    53.7    21.3
2024 05 01    10 40 08.6 -01 49 10   0.1457  1.0898   121.0    52.4    21.3
2024 05 02    10 50 01.4 -00 39 26   0.1503  1.0950   122.1    51.3    21.3
...
2024 05 08    11 39 02.7 +04 46 52   0.1835  1.1262   125.7    46.7    21.7
...
2024 05 16    12 24 00.2 +08 45 42   0.2388  1.1675   126.0    44.5    22.3
...
2024 05 31    13 15 55.5 +10 55 47   0.3611  1.2424   121.7    43.9    23.3

A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-J12





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