[Iaude] MPEC J254: 2021 KE2 [a=2.12,e=0.46,i=40.2,H=19.99]

mpec at cfa.harvard.edu mpec at cfa.harvard.edu
Fri May 10 10:16:07 EDT 2024


M.P.E.C. 2024-J254                                 Issued 2024 May 10, 14:14 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 KE2                                    


                           Revision to MPEC 2021-K78                            

Additional Observations:
     K21K02E  C2016 01 09.39016205 27 17.519-03 41 00.68         23.06GVEJ254F51
     K21K02E  C2016 01 09.41384605 27 15.843-03 40 30.89         23.43GVEJ254F51
     K21K02E  C2016 01 11.35308005 25 05.687-03 00 01.73         22.64GVEJ254F51
     K21K02E  C2016 01 11.36568705 25 04.822-02 59 45.99         23.26GVEJ254F51
     K21K02E  C2016 01 12.28760805 24 05.916-02 40 30.69         23.69GVEJ254F51
     K21K02E  C2016 01 12.30127505 24 05.009-02 40 14.02         23.19GVEJ254F51
     K21K02E KC2018 12 31.37726604 52 29.040-15 31 29.78         23.67GVEJ254F51
     K21K02E KC2019 01 07.34660904 45 22.836-12 27 19.64         22.87GVEJ254F51
     K21K02E KC2019 01 25.32188804 36 10.904-04 47 39.15         23.34GVEJ254F52
     K21K02E KC2024 05 09.40790719 00 53.737+34 47 46.61         21.84GVEJ254V06
     K21K02E KC2024 05 09.41271019 00 53.982+34 47 49.02         21.98GVEJ254V06
     K21K02E KC2024 05 09.41748319 00 54.234+34 47 51.36               VEJ254V06
     K21K02E KC2024 05 09.42225519 00 54.475+34 47 53.81         22.07GVEJ254V06

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.
F52 Pan-STARRS 2, 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.
V06 Catalina Sky Survey-Kuiper.  Observer H. Groeller.  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.  1.55-m
    reflector + 1K CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
160109 F51 0.11- 0.08-    240509 V06 0.14- 0.10-    E2024-BH3   +0.04 days

Orbital elements:
2021 KE2                                                 Earth MOID = 0.1560 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Veres                   
M 316.44344              (2000.0)            P               Q                  
n   0.31944625     Peri.  205.59313     +0.65821242     +0.46346868             
a   2.1193573      Node   113.16768     -0.53073520     +0.84456271             
e   0.4623322      Incl.   40.18777     -0.53392562     -0.26816154             
P   3.09           H   19.99          G   0.15           U   1                  
Residuals in seconds of arc
160109 F51  0.2-  0.0     210522 807  0.1-  0.1-    210607 G96  0.1-  0.3+
160109 F51  0.1+  0.1+    210522 807  0.0   0.2-    210607 G96  0.0   0.2+
160111 F51  0.2+  0.0     210522 V06  0.1+  0.1+    210607 G96  0.1-  0.2-
160111 F51  0.1-  0.1-    210522 807  0.0   0.2-    210611 I52  0.1+  0.3-
160112 F51  0.0   0.2+    210522 V06  0.0   0.0     210611 I52  0.1-  0.3-
160112 F51  0.2-  0.2-    210522 V06  0.0   0.0     210611 I52  0.3-  0.1+
181231 F51  0.1+  0.1+    210522 V06  0.1+  0.4-    210611 I52  0.1-  0.2-
190107 F51  0.0   0.2+    210522 H01  0.1+  0.1-    210615 I52  0.5-  0.3-
190125 F52  0.3+  0.5-    210522 H01  0.0   0.0     210615 I52  0.8+  1.3+
210519 V00  0.0   0.1-    210522 H01  0.0   0.2+    210615 I52  0.8+  1.4+
210519 V00  0.0   0.1+    210523 V06  0.2-  0.0     210622 I52  0.1-  1.2-
210519 V00  0.3-  0.1-    210523 V06  0.8+  0.4+    210622 I52  0.3+  0.3-
210519 V00  0.1-  0.0     210523 V06  0.1+  0.2+    211111 807  0.1-  0.2-
210519 291  0.3-  0.1+    210602 I52  1.0-  0.2+    211111 807  0.2-  0.2-
210519 291  0.2-  0.3+    210602 I52 (1.0-  0.7-)   211111 807  0.3+  0.3+
210519 291  0.0   0.2-    210605 I52  0.0   0.7-    240509 V06  0.1-  0.0
210520 V00  0.0   0.0     210605 I52  0.3+  0.1-    240509 V06  0.1-  0.0
210520 V00  0.0   0.0     210605 I52  0.1-  0.3-    240509 V06  0.0   0.1-
210520 V00  0.1+  0.1-    210607 G96  0.0   0.7+    240509 V06  0.1-  0.0

Ephemeris:
2021 KE2                 a,e,i = 2.12, 0.46, 40                  q = 1.1395
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2024 04 10    18 24 48.0 +29 50 03   1.2520  1.6932    96.8    36.0    23.1
...
2024 04 25    18 45 16.9 +32 32 08   1.0805  1.6008   100.2    38.2    22.7
...
2024 05 03    18 54 30.8 +33 51 19   0.9885  1.5519   102.0    39.4    22.5
...
2024 05 09    19 00 30.9 +34 44 25   0.9190  1.5156   103.5    40.4    22.3
2024 05 10    19 01 25.8 +34 52 34   0.9074  1.5096   103.8    40.5    22.3
2024 05 11    19 02 19.3 +35 00 28   0.8957  1.5036   104.0    40.7    22.2
...
2024 05 17    19 07 07.7 +35 42 11   0.8255  1.4679   105.7    41.6    22.0
...
2024 05 25    19 11 59.2 +36 18 16   0.7310  1.4215   108.1    42.6    21.7
...
2024 06 09    19 15 20.3 +35 45 28   0.5515  1.3391   114.2    43.8    21.0

A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-J254





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