[Iaude] MPEC A112: 2017 HR49 [a=2.34,e=0.47,i=8.1,H=18.8]

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Mon Jan 7 12:25:17 EST 2019


M.P.E.C. 2019-A112                               Issued 2019 Jan. 7, 17:21 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


                                   2017 HR49
 
                           Revision to MPEC 2017-J24
 
Additional Observations:
     K17H49R  C2018 12 13.56062009 15 16.322+19 14 56.11         23.70GVEA112T12
     K17H49R  C2018 12 13.57220309 15 16.081+19 14 58.86         24.16GVEA112T12
     K17H49R  C2019 01 03.56668809 02 46.653+21 01 30.30         23.99GVEA112T12
     K17H49R  C2019 01 03.57761509 02 46.078+21 01 34.15         23.85GVEA112T12
 
Observer details:
T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observers D. Hung,
    D. J. Tholen.  Measurer D. J. Tholen.  2.24-m f/10.1 reflector + CCD.
 
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
181213 T12  8.3+  2.4-    190103 T12  9.9+  2.6-    MPO419559   +0.0022 day
 
Orbital elements:
2017 HR49                                                Earth MOID = 0.2538 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
M 145.15873              (2000.0)            P               Q
n   0.27554126     Peri.  229.61329     +0.87725733     +0.45990091
a   2.3388999      Node   102.59815     -0.38656728     +0.84669630
e   0.4698152      Incl.    8.10044     -0.28457917     +0.26757529
P   3.58           H   18.8           G   0.15           U   3
Residuals in seconds of arc
170428 F51  0.1+  0.1-    170502 691  0.0   0.3+    170516 807  0.2+  0.1-
170428 F51  0.2+  0.0     170502 I52  0.2-  0.7-    170516 807  0.8+  0.4-
170428 F51  0.0   0.0     170502 I52  0.7+  0.1-    170517 F51  0.1+  0.0
170428 F51  0.0   0.1-    170502 I52  0.1+  0.4+    170517 F51  0.1+  0.1-
170429 K93  0.0   0.3-    170503 807  0.2-  0.2+    170517 F51  0.1+  0.2-
170429 K93  0.1-  0.2-    170503 807  0.3-  0.2+    170531 691  0.4-  0.0
170429 K93  0.3-  0.3-    170503 807  0.2-  0.2+    170531 691  0.2-  0.1+
170430 691  0.2-  0.3+    170504 691  0.1-  0.2+    170531 691  0.1-  0.2-
170430 691  0.5+  0.2+    170504 691  0.1-  0.2+    170614 H21  0.2+  0.3+
170430 I52  0.0   0.4+    170504 691  0.2-  0.7+    170614 H21  0.0   0.0
170430 691  0.1-  0.0     170505 291  0.5-  0.3-    170614 H21  0.4+  0.1+
170430 I52  0.8-  0.9+    170505 291  1.0+  0.7-    170917 807  0.6-  1.0-
170501 I52  0.1+  1.9+    170505 291  0.1+  0.0     170917 807  0.3-  0.6-
170501 I52  0.5-  0.6+    170506 695  0.2+  0.2+    170917 807  0.1-  0.1-
170501 I52  0.1+  0.9+    170506 695  0.0   0.3+    181213 T12  0.1-  0.0
170501 691  0.5-  0.5-    170506 695  0.1+  0.2+    181213 T12  0.0   0.1-
170501 691  0.7-  0.8-    170515 807  0.0   0.1-    190103 T12  0.1+  0.0
170501 691  0.3-  0.0     170515 807  0.1-  0.0     190103 T12  0.0   0.0
170502 691  0.1+  0.0     170515 807  0.1+  0.5-
170502 691  0.2-  0.0     170516 807  0.8+  0.1-

Ephemeris:
2017 HR49                a,e,i = 2.34, 0.47, 8                   q = 1.2400
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 12 08    09 16 40.2 +18 54 34   2.4003  3.0130   119.7    16.5    24.0
...
2018 12 23    09 11 01.5 +19 57 46   2.2707  3.0601   136.5    12.8    23.8
...
2018 12 31    09 05 39.3 +20 40 50   2.2195  3.0841   146.0    10.3    23.6
...
2019 01 06    09 00 39.8 +21 15 57   2.1914  3.1016   153.3     8.2    23.5
2019 01 07    08 59 45.6 +21 21 58   2.1877  3.1044   154.5     7.8    23.5
2019 01 08    08 58 50.3 +21 27 59   2.1842  3.1073   155.8     7.5    23.5
...
2019 01 14    08 52 57.9 +22 04 26   2.1698  3.1241   163.1     5.2    23.4
...
2019 01 22    08 44 28.3 +22 52 06   2.1677  3.1458   172.4     2.4    23.2
...
2019 02 06    08 28 09.8 +24 10 06   2.2188  3.1844   166.0     4.3    23.4

A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-A112



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