[Iaude] MPEC J26: 2021 HE3 [a=1.17,e=0.11,i=15.5,H=25.2]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun May 2 19:18:48 EDT 2021


M.P.E.C. 2021-J26                                   Issued 2021 May 2, 23:17 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 HE3                                    


Observations:
     K21H03E* C2021 04 30.29898813 39 39.798+18 31 45.52         21.49wUEJ026F51
     K21H03E  C2021 04 30.31254113 39 43.094+18 33 41.56         21.49wUEJ026F51
     K21H03E  C2021 04 30.32608313 39 46.338+18 35 36.60         21.43wUEJ026F51
     K21H03E KC2021 05 01.13301313 43 28.28 +20 23 53.5          21.1 VuEJ026H21
     K21H03E KC2021 05 01.13959713 43 29.80 +20 24 44.9          20.9 VuEJ026H21
     K21H03E KC2021 05 01.14782813 43 31.76 +20 25 49.4          20.9 VuEJ026H21
     K21H03E  C2021 05 01.38787813 44 29.45 +20 56 35.9          20.9 GVEJ026H01
     K21H03E KC2021 05 01.39244213 44 30.78 +20 57 13.7          20.25GVEJ026I52
     K21H03E  C2021 05 01.39376813 44 30.86 +20 57 19.7          21.4 GVEJ026H01
     K21H03E KC2021 05 01.39754813 44 31.92 +20 57 51.5          21.43GVEJ026I52
     K21H03E  C2021 05 01.40179513 44 32.79 +20 58 19.3          23.0 GVEJ026H01
     K21H03E  C2021 05 01.40899313 44 34.54 +20 59 12.7          21.8 GVEJ026H01
     K21H03E 1C2021 05 02.88485 13 50 59.44 +23 52 12.5          21.1 VVEJ026033
     K21H03E 1C2021 05 02.90422 13 51 03.66 +23 54 19.9          21.3 VVEJ026033
     K21H03E 1C2021 05 02.90642 13 51 04.13 +23 54 34.0          21.2 VVEJ026033
     K21H03E 1C2021 05 02.90861 13 51 04.61 +23 54 48.2          21.6 VVEJ026033

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.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
    Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
    Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
    R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + 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.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.76-m f/3.0
    astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer K. W. Wierzchos.
    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.

Orbital elements:
2021 HE3                                                 Earth MOID = 0.0556 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
M 292.12369              (2000.0)            P               Q                  
n   0.78017524     Peri.  321.59956     -0.98114906     -0.13305113             
a   1.1686235      Node   211.61818     +0.15674258     -0.97211508             
e   0.1102149      Incl.   15.50628     -0.11304109     -0.19310531             
P   1.26           H   25.27          G   0.15           U   7                  
Residuals in seconds of arc
210430 F51  0.1-  0.0     210501 H01  0.1+  0.1+    210502 033  0.1+  0.1+
210430 F51  0.1+  0.2+    210501 I52  0.5+  0.2-    210502 033  0.0   0.2+
210430 F51  0.0   0.1-    210501 H01  0.0   0.1+    210502 033  0.1-  0.1-
210501 H21 (1.4-  0.2-)   210501 I52  0.5-  0.3-    210502 033  0.0   0.2-
210501 H21 (1.8-  0.5-)   210501 H01  0.1+  0.1+
210501 H21 (1.5-  0.6-)   210501 H01  0.2+  0.1+

Ephemeris:
2021 HE3                 a,e,i = 1.17, 0.11, 16                  q = 1.0398
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 04 02    09 47 47.3 -62 55 55   0.1036  1.0452   113.5    61.2    22.6
...
2021 04 17    12 11 34.0 -30 29 01   0.05984 1.0566   151.3    27.2    20.5
...
2021 04 25    13 10 58.2 +02 40 13   0.06327 1.0651   158.5    20.2    20.4
...
2021 05 01    13 42 49.4 +20 07 05   0.07993 1.0723   142.8    34.6    21.4
2021 05 02    13 47 14.5 +22 12 09   0.08343 1.0736   140.6    36.6    21.5
2021 05 03    13 51 26.2 +24 05 22   0.08707 1.0749   138.6    38.4    21.7
...
2021 05 09    14 12 39.8 +32 09 00   0.1111  1.0830   129.1    46.3    22.4
...
2021 05 17    14 33 21.6 +37 24 31   0.1462  1.0948   121.5    52.0    23.2
...
2021 06 01    15 00 03.0 +39 50 19   0.2139  1.1190   114.3    55.7    24.2

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-J26




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