[Iaude] MPEC K18: 2021 JH9 [a=1.74,e=0.65,i=31.7,H=20.4]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Mon May 17 03:30:40 EDT 2021


M.P.E.C. 2021-K18                                  Issued 2021 May 17, 07:29 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 JH9                                    


Observations:
     K21J09H  C2021 05 03.38097 16 39 14.89 +35 51 52.7          21.3 GVEK018G96
     K21J09H  C2021 05 03.38618 16 39 14.85 +35 52 15.0          22.0 GVEK018G96
     K21J09H* C2021 05 15.35821216 34 52.16 +50 11 57.3          21.14GVEK018G96
     K21J09H  C2021 05 15.36457316 34 51.83 +50 12 24.8          21.16GVEK018G96
     K21J09H  C2021 05 15.37040716 34 51.52 +50 12 50.6          21.20GVEK018G96
     K21J09H  C2021 05 15.37590016 34 51.27 +50 13 14.7          21.58GVEK018G96
     K21J09H KC2021 05 15.43979616 34 47.85 +50 17 53.9          21.32GVEK018I52
     K21J09H KC2021 05 15.44400216 34 47.69 +50 18 12.4          21.54GVEK018I52
     K21J09H KC2021 05 15.44820816 34 47.45 +50 18 30.2          21.43GVEK018I52
     K21J09H KC2021 05 15.45241416 34 47.25 +50 18 49.0          21.37GVEK018I52
     K21J09H 1C2021 05 15.90475 16 34 28.23 +50 51 50.2          21.0 VVEK018033
     K21J09H 1C2021 05 15.90805 16 34 28.08 +50 52 03.9          21.0 VVEK018033
     K21J09H 1C2021 05 15.91134 16 34 27.88 +50 52 18.8          20.8 VVEK018033
     K21J09H !C2021 05 16.07741516 34 19.600+51 04 35.69         21.3 GVEK018J04
     K21J09H !C2021 05 16.08831116 34 18.989+51 05 23.27         21.3 GVEK018J04
     K21J09H !C2021 05 16.09917016 34 18.361+51 06 11.24         21.2 GVEK018J04
     K21J09H  C2021 05 16.26146516 34 11.41 +51 18 00.9          21.2 GVEK018H01
     K21J09H  C2021 05 16.26734716 34 11.09 +51 18 26.8          20.9 GVEK018H01
     K21J09H  C2021 05 16.27556816 34 10.63 +51 19 03.1          21.3 GVEK018H01
     K21J09H  C2021 05 16.28228516 34 10.25 +51 19 32.8          21.2 GVEK018H01
     K21J09H  C2021 05 17.24927216 33 21.88 +52 30 13.2          21.1 GVEK018H01
     K21J09H  C2021 05 17.25787816 33 21.35 +52 30 51.3          21.0 GVEK018H01
     K21J09H  C2021 05 17.26563116 33 20.88 +52 31 25.5          21.0 GVEK018H01
     K21J09H  C2021 05 17.27163516 33 20.51 +52 31 51.8          21.4 GVEK018H01
     K21J09H KC2021 05 17.28036816 33 20.06 +52 32 30.6          21.48GVEK018I52
     K21J09H KC2021 05 17.28702316 33 19.66 +52 32 59.9          20.80GVEK018I52
     K21J09H KC2021 05 17.29246016 33 19.32 +52 33 23.5          21.36GVEK018I52
     K21J09H KC2021 05 17.29582616 33 19.13 +52 33 38.8          21.84GVEK018I52

Observer details:
033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
    Hoegner, U. Laux, F. Ludwig, B. Stecklum.  Measurer B. Stecklum.  1.34-m
    f/3 Schmidt + CCD.
G96 Mt. Lemmon Survey.  Observers D. Rankin, G. J. Leonard.  Measurers B.
    Gray, D. Rankin, F. C. Shelly, 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, R. L. Seaman, K. W. Wierzchos.  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 D. C. Fuls.  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.
J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers R.
    Kresken, M. Micheli, D. Koschny, L. Conversi.  1.0-m f/4.4 reflector +
    CCD.

Orbital elements:
2021 JH9                                                 Earth MOID = 0.3613 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
M 263.05962              (2000.0)            P               Q                  
n   0.42876585     Peri.  160.64997     +0.97344454     +0.21712668             
a   1.7417638      Node   187.94592     -0.20579061     +0.96878932             
e   0.6515633      Incl.   31.65011     +0.10027942     -0.11959621             
P   2.30           H   20.45          G   0.15           U   8                  
Residuals in seconds of arc
210503 G96  0.0   0.4-    210515 033  0.1+  0.2+    210517 H01  0.1+  0.0
210503 G96  0.1+  0.4+    210515 033  0.3+  0.7-    210517 H01  0.0   0.1+
210515 G96  0.1-  0.1+    210515 033  0.0   0.3-    210517 H01  0.0   0.1+
210515 G96  0.0   0.2-    210516 J04  0.0   0.0     210517 H01  0.0   0.0
210515 G96  0.1-  0.0     210516 J04  0.0   0.3-    210517 I52  0.1-  0.0
210515 G96  0.3+  0.0     210516 J04  0.1-  0.1+    210517 I52  0.0   0.0
210515 I52  0.5-  0.1+    210516 H01  0.1-  0.1+    210517 I52  0.1-  0.3-
210515 I52  0.1+  0.3+    210516 H01  0.0   0.0     210517 I52  0.1+  0.2+
210515 I52  0.1-  0.2-    210516 H01  0.0   0.0
210515 I52  0.1+  0.3+    210516 H01  0.0   0.1+

Ephemeris:
2021 JH9                 a,e,i = 1.74, 0.65, 32                  q = 0.6069
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 04 17    16 35 08.6 +19 05 52   0.7570  1.5844   127.7    30.1    22.1
...
2021 05 02    16 39 16.9 +34 17 17   0.6224  1.4408   122.4    36.2    21.7
...
2021 05 10    16 37 49.9 +43 41 03   0.5764  1.3603   115.4    42.1    21.6
...
2021 05 16    16 34 23.2 +50 58 46   0.5530  1.2981   108.6    47.6    21.5
2021 05 17    16 33 34.1 +52 11 53   0.5499  1.2876   107.4    48.5    21.5
2021 05 18    16 32 40.3 +53 24 54   0.5471  1.2770   106.2    49.5    21.5
...
2021 05 24    16 25 16.9 +60 38 07   0.5342  1.2129    98.5    55.7    21.5
...
2021 06 01    16 06 51.2 +69 53 00   0.5259  1.1255    88.0    64.2    21.6
...
2021 06 16    12 53 02.3 +84 25 46   0.5260  0.9582    68.6    80.7    21.8

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-K18




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