[Iaude] MPEC J157: 2017 QN18 [a=2.14,e=0.83,i=6.7,H=20.36]

mpec at cfa.harvard.edu mpec at cfa.harvard.edu
Wed May 8 10:13:01 EDT 2024


M.P.E.C. 2024-J157                                  Issued 2024 May 8, 14:11 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 QN18                                    


                           Revision to MPEC 2017-Q140                           

Additional Observations:
     K17Q18N KC2024 05 06.60258415 59 45.619-33 08 17.77         20.8 GVEJ157474
     K17Q18N KC2024 05 06.60498715 59 45.034-33 08 15.32         21.6 GVEJ157474
     K17Q18N KC2024 05 06.61459715 59 42.684-33 08 04.88         21.2 GVEJ157474
     K17Q18N KC2024 05 06.61700015 59 42.043-33 08 02.04         21.4 GVEJ157474
     K17Q18N KC2024 05 06.61916215 59 41.474-33 07 58.94         20.9 GVEJ157474
     K17Q18N KC2024 05 07.35095815 56 46.799-32 55 12.01               VEJ157I52
     K17Q18N KC2024 05 07.35521815 56 45.714-32 55 06.91         21.4 GVEJ157I52
     K17Q18N KC2024 05 07.35908215 56 44.787-32 55 02.56               VEJ157I52

Observer details:
474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M.
    Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 Reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  Measurers
    D. Rankin, D. Parrott.  1.00-m f/2.0 prime focus + CCD + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
240506 474 45.0+ 10.9+    240507 I52 46.3+  9.4+    E2024-E02   +0.02 days

Orbital elements:
2017 QN18                                                Earth MOID = 0.1039 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Veres                   
M  16.36997              (2000.0)            P               Q                  
n   0.31471844     Peri.  176.55897     -0.12158064     -0.98588622             
a   2.1405297      Node   280.40096     +0.90785920     -0.06357761             
e   0.8334552      Incl.    6.71993     +0.40126028     -0.15487495             
P   3.13           H   20.36          G   0.15           U   2                  
Residuals in seconds of arc
170729 F51  0.2-  0.1-    170828 H01  0.0   0.2-    170830 H21  0.1-  0.1+
170729 F51  0.2+  0.1-    170828 H01  0.1-  0.2-    170830 H21  0.0   0.3-
170729 F51  0.1+  0.0     170828 H01  0.1-  0.2-    170908 G40  0.2+  0.1+
170821 F51  0.3-  0.1+    170828 E23  0.1+  1.7+    170908 G40  0.5-  0.2-
170827 T08  0.5+  1.1-    170828 E23  0.5+  0.8+    170915 807  0.2-  0.1-
170827 T08  0.2+  0.2+    170828 Q62  0.1+  0.4+    170915 807  0.1+  0.0
170827 T08  0.6-  1.3-    170828 Q62  0.4-  0.1+    170915 807  0.2+  0.2-
170827 T08  0.8+  0.1+    170828 E23  0.5+  0.2-    240506 474  0.0   0.0
170827 J95  0.3+  0.4-    170828 Q62  0.3+  0.3-    240506 474  0.1+  0.1-
170827 J95  0.6+  0.1+    170829 T05  0.6+  0.5-    240506 474  0.3+  0.0
170828 J95  0.0   0.1+    170829 T05  0.4-  0.1-    240506 474  0.4-  0.3+
170828 J95  0.1-  0.3-    170829 T05  0.4-  0.2+    240506 474  0.8-  1.0+
170828 734  1.3-  0.7+    170829 T05  0.4-  0.1+    240507 I52  1.0+  1.3-
170828 734  0.5-  0.0     170830 H21  0.1+  0.1-    240507 I52  0.3+  0.8-
170828 734  0.3-  0.1-    170830 H21  0.0   0.3-    240507 I52  0.5+  0.6-
170828 H01  0.1-  0.1-    170830 H21  0.0   0.1-

Ephemeris:
2017 QN18                a,e,i = 2.14, 0.83, 7                   q = 0.3565
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2024 04 08    18 13 02.4 -36 40 56   0.5456  1.2597   105.2    50.1    21.4
...
2024 04 23    17 01 40.0 -36 14 50   0.5812  1.4673   133.5    29.8    21.3
...
2024 05 01    16 23 45.3 -34 40 21   0.6213  1.5709   148.4    19.6    21.3
...
2024 05 07    15 58 10.5 -33 01 17   0.6642  1.6456   158.6    12.9    21.3
2024 05 08    15 54 14.4 -32 43 16   0.6725  1.6578   160.2    11.9    21.3
2024 05 09    15 50 24.6 -32 24 57   0.6811  1.6699   161.7    11.0    21.3
...
2024 05 15    15 29 41.7 -30 31 55   0.7395  1.7415   168.3     6.8    21.4
...
2024 05 23    15 08 09.8 -28 04 56   0.8346  1.8335   166.1     7.6    21.8
...
2024 06 07    14 43 56.1 -24 21 43   1.0587  1.9964   148.6    15.3    22.8

A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-J157





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