[Iaude] MPEC J164: 2021 JF4 [a=1.75,e=0.61,i=41.7,H=22.4]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Tue May 11 15:25:38 EDT 2021


M.P.E.C. 2021-J164                                 Issued 2021 May 11, 19:24 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  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 JF4                                    


Observations:
     K21J04F* C2021 05 09.24888012 22 31.31 +00 08 55.2          21.46GVEJ164G96
     K21J04F  C2021 05 09.25408212 22 30.73 +00 08 18.3          21.41GVEJ164G96
     K21J04F  C2021 05 09.25929112 22 30.10 +00 07 41.7                VEJ164G96
     K21J04F  C2021 05 09.26449912 22 29.54 +00 07 03.8          21.41GVEJ164G96
     K21J04F KC2021 05 09.33948212 22 21.32 -00 01 50.4          22.19GVEJ164G96
     K21J04F KC2021 05 09.34069912 22 21.19 -00 01 59.5                VEJ164G96
     K21J04F KC2021 05 09.34191512 22 21.01 -00 02 07.9                VEJ164G96
     K21J04F KC2021 05 10.14232112 21 05.91 -01 33 41.7          21.10GVEJ164V06
     K21J04F KC2021 05 10.14587312 21 05.54 -01 34 05.0          21.38GVEJ164V06
     K21J04F KC2021 05 10.14942512 21 05.18 -01 34 28.6          21.32GVEJ164V06
     K21J04F KC2021 05 10.15297712 21 04.82 -01 34 52.3          21.68GVEJ164V06
     K21J04F  C2021 05 10.23389 12 20 56.69 -01 43 45.7          21.1 GVEJ164G96
     K21J04F  C2021 05 10.23454112 20 56.52 -01 43 51.3          21.4 GVEJ164H01
     K21J04F  C2021 05 10.23817912 20 56.17 -01 44 15.6          21.3 GVEJ164H01
     K21J04F  C2021 05 10.23909 12 20 56.15 -01 44 20.7          21.2 GVEJ164G96
     K21J04F  C2021 05 10.24929612 20 55.06 -01 45 28.3          21.8 GVEJ164H01
     K21J04F  C2021 05 10.25714712 20 54.30 -01 46 20.2          20.9 GVEJ164H01
     K21J04F KC2021 05 11.20082512 19 35.09 -03 25 36.4          21.80GVEJ164I52
     K21J04F KC2021 05 11.20670412 19 34.57 -03 26 11.7          21.62GVEJ164I52
     K21J04F KC2021 05 11.21258112 19 34.05 -03 26 48.2          21.22GVEJ164I52
     K21J04F  C2021 05 11.24842512 19 30.79 -03 30 25.1          21.5 GVEJ164H01
     K21J04F  C2021 05 11.25798312 19 29.94 -03 31 22.7          21.9 GVEJ164H01
     K21J04F  C2021 05 11.26360712 19 29.45 -03 31 56.9          21.8 GVEJ164H01

Observer details:
G96 Mt. Lemmon Survey.  Observer H. Groeller.  Measurers E. J. Christensen, G.
    A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
    Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos, B. Gray.  1.5-m reflector + 10K
    CCD.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer T. A. Pruyne.
    Measurers E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D.
    Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A.
    Pruyne, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m
    reflector + CCD.
V06 Catalina Sky Survey-Kuiper.  Observer G. J. Leonard.  Measurers E. J.
    Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H.
    Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D.
    Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.55-m reflector +
    1K CCD.

Orbital elements:
2021 JF4                                                 Earth MOID = 0.0004 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
M 329.66612              (2000.0)            P               Q                  
n   0.42713346     Peri.   79.03165     -0.32384627     -0.84475091             
a   1.7461987      Node    39.85201     +0.36873970     -0.52740422             
e   0.6053475      Incl.   41.67209     +0.87129480     -0.09077818             
P   2.31           H   22.43          G   0.15           U   9                  
Residuals in seconds of arc
210509 G96  0.1+  0.3-    210510 V06  0.2-  0.0     210510 H01  0.2+  0.3-
210509 G96  0.2+  0.0     210510 V06  0.1-  0.0     210511 I52  0.1+  0.1+
210509 G96  0.5-  0.7+    210510 V06  0.2-  0.2-    210511 I52  0.2+  0.4+
210509 G96  0.3-  0.0     210510 G96  0.2+  0.7+    210511 I52  0.2+  0.5-
210509 G96  0.0   0.1+    210510 H01  0.1-  0.1-    210511 H01  0.0   0.0
210509 G96  0.1+  0.3-    210510 H01  0.0   0.4-    210511 H01  0.2-  0.1+
210509 G96  0.7-  0.1-    210510 G96  0.1-  0.1-    210511 H01  0.2-  0.2-
210510 V06  0.1-  0.2-    210510 H01  0.0   0.0

Ephemeris:
2021 JF4                 a,e,i = 1.75, 0.61, 42                  q = 0.6891
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 04 11    21 00 31.0 +69 19 35   0.2870  0.9605    73.4    89.9    22.8
...
2021 04 26    13 25 34.7 +46 01 34   0.1823  1.1076   119.6    52.2    20.9
...
2021 05 04    12 35 17.1 +13 22 48   0.2303  1.1866   136.8    35.6    21.1
...
2021 05 10    12 21 18.6 -01 17 30   0.3022  1.2453   136.1    34.2    21.7
2021 05 11    12 19 51.5 -03 04 47   0.3159  1.2550   135.5    34.3    21.8
2021 05 12    12 18 35.1 -04 43 27   0.3299  1.2647   134.9    34.5    22.0
...
2021 05 18    12 13 54.4 -12 16 45   0.4195  1.3224   130.4    35.6    22.6
...
2021 05 26    12 12 56.1 -18 31 15   0.5488  1.3977   124.3    36.8    23.3
...
2021 06 10    12 19 56.7 -25 02 29   0.8077  1.5334   114.0    37.2    24.4

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-J164




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