[Iaude] MPEC J172: 2021 JS4 [a=2.05,e=0.44,i=8.4,H=19.3]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Tue May 11 18:15:37 EDT 2021


M.P.E.C. 2021-J172                                 Issued 2021 May 11, 22:14 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 JS4                                    


Observations:
     K21J04S  C2021 04 17.41085112 26 07.327-17 59 18.25         22.43GVEJ172F51
     K21J04S  C2021 04 17.43408312 26 05.496-17 59 07.66         22.39GVEJ172F51
     K21J04S  C2021 04 17.44568512 26 04.594-17 59 02.23         22.13GVEJ172F51
     K21J04S* C2021 05 09.34229512 03 53.620-15 02 53.84         22.82wUEJ172F51
     K21J04S  C2021 05 09.35533412 03 53.054-15 02 47.52         22.19wUEJ172F51
     K21J04S  C2021 05 09.36840512 03 52.472-15 02 41.77         22.77wUEJ172F51
     K21J04S ^C2021 05 10.23841812 03 17.989-14 56 02.96         23.05GVEJ172568
     K21J04S ^C2021 05 10.23939612 03 17.946-14 56 02.22         22.87GVEJ172568
     K21J04S ^C2021 05 10.24054712 03 17.904-14 56 01.94         21.91GVEJ172568
     K21J04S ^C2021 05 10.24154212 03 17.858-14 56 01.58         22.17GVEJ172568
     K21J04S ^C2021 05 10.24256712 03 17.809-14 56 00.87         22.47GVEJ172568
     K21J04S ^C2021 05 10.24357912 03 17.765-14 56 00.55         22.12GVEJ172568
     K21J04S ^C2021 05 10.24455712 03 17.733-14 56 00.04         21.86GVEJ172568
     K21J04S ^C2021 05 10.24581912 03 17.679-14 55 59.43         22.59GVEJ172568
     K21J04S KC2021 05 11.17590 12 02 42.15 -14 49 00.3                oEJ172291
     K21J04S KC2021 05 11.18890 12 02 41.62 -14 48 53.7                oEJ172291
     K21J04S KC2021 05 11.20190 12 02 41.14 -14 48 47.4          22.1 RoEJ172291

Observer details:
291 LPL/Spacewatch II.  Observer J. V. Scotti.  1.8-m f/2.7 reflector + CCD.
568 Mauna Kea.  Observers R. Wainscoat, C. Cunningham, N. Manset.  Measurers
    R. Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, I. Smith, M. Willman.  Measurers S. Chastel, M. Huber, Y.
    Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, L. Denneau,
    J. Fairlamb, H. Flewelling, C.-C. Lin, E. Magnier.  1.8-m Ritchey-Chretien
    + CCD.

Orbital elements:
2021 JS4                                                 Earth MOID = 0.1459 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
M 235.88950              (2000.0)            P               Q                  
n   0.33632862     Peri.   22.80934     +0.86332099     +0.49100280             
a   2.0478281      Node   307.26226     -0.48266089     +0.73589651             
e   0.4378973      Incl.    8.42373     -0.14736120     +0.46623232             
P   2.93           H   19.33          G   0.15           U   8                  
Residuals in seconds of arc
210417 F51  0.0   0.0     210510 568  0.0   0.1-    210510 568  0.0   0.0
210417 F51  0.1-  0.0     210510 568  0.0   0.2+    210510 568  0.0   0.0
210417 F51  0.1+  0.1+    210510 568  0.1+  0.1-    210511 291  0.2+  0.4-
210509 F51  0.1+  0.0     210510 568  0.0   0.2-    210511 291  0.0   0.3+
210509 F51  0.1+  0.2+    210510 568  0.1-  0.1+    210511 291  0.4+  0.8+
210509 F51  0.1-  0.1-    210510 568  0.1-  0.1-

Ephemeris:
2021 JS4                 a,e,i = 2.05, 0.44, 8                   q = 1.1511
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 04 11    12 34 29.2 -18 44 36   1.3591  2.3418   165.1     6.3    22.3
...
2021 04 26    12 15 54.4 -16 50 56   1.3397  2.2748   151.4    12.2    22.5
...
2021 05 04    12 08 02.1 -15 45 10   1.3517  2.2376   142.5    15.9    22.6
...
2021 05 10    12 03 27.2 -14 57 48   1.3692  2.2091   135.9    18.5    22.7
2021 05 11    12 02 48.7 -14 50 15   1.3728  2.2043   134.8    19.0    22.7
2021 05 12    12 02 12.3 -14 42 48   1.3765  2.1995   133.7    19.4    22.7
...
2021 05 18    11 59 19.8 -14 01 03   1.4019  2.1702   127.4    21.7    22.8
...
2021 05 26    11 57 32.7 -13 14 44   1.4425  2.1304   119.3    24.5    22.9
...
2021 06 10    12 00 12.6 -12 21 39   1.5316  2.0532   105.6    28.4    23.1

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-J172




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