[Iaude] MPEC X26: 2017 HC49 [a=0.85,e=0.45,i=29.9,H=22.28]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Mon Dec 4 09:09:08 EST 2023


M.P.E.C. 2023-X26                              Issued 2023 December 4, 14:07 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

                                   2017 HC49                                    


                            Revision to MPEC 2017-J6                            

Additional Observations:
     K17H49C  C2010 04 18.47539114 39 45.207-08 30 55.17         19.55GVEX026F51
     K17H49C  C2010 04 18.48458014 39 40.380-08 31 22.97         19.69GVEX026F51
     K17H49C  S2010 05 26.25129309 49 48.38 -24 25 28.3                WEX026C51
     K17H49C  s2010 05 26.2512931 - 5729.2163 + 2793.4092 - 2670.7573   EX026C51
     K17H49C  S2010 05 26.58211609 48 47.83 -24 26 26.7                WEX026C51
     K17H49C  s2010 05 26.5821161 - 5753.7630 + 2770.4054 - 2642.2806   EX026C51
     K17H49C  S2010 05 26.64820509 48 35.89 -24 26 39.8                WEX026C51
     K17H49C  s2010 05 26.6482051 - 5744.6393 + 2750.9652 - 2682.1839   EX026C51
     K17H49C  S2010 05 26.84659709 48 00.19 -24 27 15.1                WEX026C51
     K17H49C  s2010 05 26.8465971 - 5740.8156 + 2717.5795 - 2724.6088   EX026C51

Observer details:
C51 WISE.  Observer .  Measurer S. Deen.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M. Huber, Y.
    Ramanjooloo, P. VanWylen, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien
    + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
100418 F51 66.0+ 77.5+    100526 C51 41.1+ 53.5+    MPO724772   +0.00 days

Orbital elements:
2017 HC49                                                Earth MOID = 0.1755 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
M 270.82121              (2000.0)            P               Q                  
n   1.26392045     Peri.  347.68958     +0.92456252     -0.27211602             
a   0.8472070      Node    32.29735     +0.37800922     +0.56707628             
e   0.4495741      Incl.   29.94536     +0.04788704     +0.77741711             
P   0.78           H   22.28          G   0.15           U   1                  
Residuals in seconds of arc
100418 F51  0.3+  0.1-    170429 T12  0.1+  0.0     170501 926  0.3+  0.2-
100418 F51  0.3+  0.1-    170429 T12  0.0   0.0     170502 926  0.5+  0.3+
100526 C51  0.6-  0.8-    170429 T12  0.0   0.0     170502 I52  0.4-  0.1-
100526 C51  0.8-  1.8+    170429 T12  0.1+  0.1+    170502 926  0.6-  0.4-
100526 C51  0.3-  0.6+    170429 807  0.3-  0.3+    170502 I52  0.0   0.0
100526 C51  0.0   1.0+    170429 807  0.1-  0.0     170502 I52  0.7+  0.4+
170322 F51  0.2-  0.0     170429 807  0.1+  0.2-    170502 I52  0.5-  0.3+
170401 F51  0.1-  0.0     170430 691  0.3-  0.3-    170503 I52  0.2-  0.5+
170407 F51  0.7+  0.3+    170430 691  0.5-  0.2-    170503 I52  0.1+  0.2+
170407 F51  0.1-  0.2+    170430 691  1.0-  0.7-    170503 I52  0.5-  0.1-
170407 F51  0.2-  0.4+    170430 I52  0.5+  0.2-    170503 I52  0.4-  0.1+
170427 F51  0.2-  0.0     170430 I52  0.9+  0.2+    170504 291  0.1+  0.3+
170427 F51  0.1+  0.0     170430 I52  0.5+  0.1+    170504 291  0.4-  0.4-
170427 F51  0.2-  0.0     170430 I52  0.3+  0.2-    170504 291  0.1-  0.2-
170427 F51  0.3-  0.1+    170501 291  0.8+  0.2-    170522 807  1.2+  0.2-
170428 568  0.2+  0.0     170501 291  0.2-  0.1+    170522 807  0.3+  0.2-
170428 568  0.2+  0.0     170501 291  0.2+  1.4-    170522 807  0.5+  0.0
170428 568  0.2+  0.1+    170501 926  0.3-  0.2+
170429 T12  0.0   0.0     170501 926  0.0   0.2-

Ephemeris:
2017 HC49                a,e,i = 0.85, 0.45, 30                  q = 0.4663
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2023 11 04    16 17 47.6 -36 07 41   1.0588  0.5556    31.2    67.7    23.5
...
2023 11 19    17 24 39.1 -30 53 41   0.7550  0.4702    27.3   105.2    23.9
...
2023 11 27    17 40 42.0 -21 47 17   0.6137  0.4723    21.4   130.2    25.3
...
2023 12 03    17 38 47.8 -12 16 22   0.5453  0.4978    18.2   141.8    26.6
2023 12 04    17 37 29.5 -10 35 08   0.5378  0.5037    18.2   142.3    26.6
2023 12 05    17 35 57.9 -08 53 51   0.5314  0.5099    18.4   142.3    26.6
...
2023 12 11    17 23 39.3 +00 39 12   0.5146  0.5545    23.8   134.1    25.7
...
2023 12 19    17 05 30.5 +10 02 20   0.5326  0.6252    34.8   116.2    24.5
...
2024 01 03    16 44 40.6 +17 43 28   0.5980  0.7649    51.0    91.5    23.8

A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-X26




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