[Iaude] MPEC F12: 2018 EN4 [a=21.40,e=0.93,i=81.7,H=17.3]

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Fri Mar 16 15:33:17 EDT 2018


M.P.E.C. 2018-F12                                Issued 2018 Mar. 16, 19:27 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


                                   2018 EN4
 
Observations:
     K18E04N* S2018 03 09.08775 06 34 15.16 -11 44 43.0          20   RLEF012C51
     K18E04N  s2018 03 09.08775 1 - 1396.2275 + 6571.9957 - 1397.3229   EF012C51
     K18E04N  S2018 03 09.15320 06 34 12.44 -11 40 59.7                LEF012C51
     K18E04N  s2018 03 09.15320 1 - 1403.5464 + 6570.8187 - 1395.4670   EF012C51
     K18E04N  S2018 03 09.21865 06 34 09.78 -11 37 16.2                LEF012C51
     K18E04N  s2018 03 09.21865 1 - 1410.8638 + 6569.6288 - 1393.6111   EF012C51
     K18E04N  S2018 03 09.41552 06 34 02.04 -11 26 04.1                LEF012C51
     K18E04N  s2018 03 09.41552 1 - 1401.5566 + 6632.9643 - 1060.8598   EF012C51
     K18E04N  S2018 03 09.67733 06 33 51.52 -11 11 10.5                LEF012C51
     K18E04N  s2018 03 09.67733 1 - 1431.0217 + 6627.8197 - 1053.2689   EF012C51
     K18E04N |C2018 03 13.01507 06 31 56.93 -08 01 36.2          20.0 GUEF012807
     K18E04N |C2018 03 13.01816 06 31 56.82 -08 01 25.7          20.4 GUEF012807
     K18E04N |C2018 03 13.02756 06 31 56.52 -08 00 54.0          20.0 GUEF012807
     K18E04N HC2018 03 13.17248 06 31 52.25 -07 52 49.9                oEF012691
     K18E04N HC2018 03 13.18366 06 31 51.93 -07 52 11.0                oEF012691
     K18E04N HC2018 03 13.19488 06 31 51.48 -07 51 32.9                oEF012691
     K18E04N HC2018 03 13.80208 06 31 34.50 -07 17 16.8          20.5 GUEF012204
     K18E04N KC2018 03 13.82381 06 31 33.82 -07 16 02.7                UEF012204
     K18E04N KC2018 03 14.10424906 31 26.23 -07 00 14.3          20.6 VuEF012H21
     K18E04N KC2018 03 14.10813706 31 26.10 -07 00 01.0          20.5 VuEF012H21
     K18E04N KC2018 03 14.11188506 31 26.00 -06 59 48.5          20.5 VuEF012H21
     K18E04N  C2018 03 14.20350 06 31 23.40 -06 54 38.1                UEF012I52
     K18E04N  C2018 03 14.20784 06 31 23.37 -06 54 23.3                UEF012I52
     K18E04N  C2018 03 14.20860 06 31 23.37 -06 54 21.0                UEF012I52
     K18E04N  C2018 03 14.21848 06 31 23.07 -06 53 47.0                UEF012I52
     K18E04N 1C2018 03 15.44510 06 30 53.05 -05 44 45.7                vEF012Q62
     K18E04N 1C2018 03 15.44734 06 30 52.99 -05 44 38.2                vEF012Q62
     K18E04N 1C2018 03 15.44958 06 30 52.92 -05 44 30.6          20.8 wvEF012Q62
     K18E04N KC2018 03 16.36664 06 30 33.14 -04 53 13.3                UEF012474
     K18E04N KC2018 03 16.36875 06 30 33.13 -04 53 07.1          20.6 RUEF012474
     K18E04N KC2018 03 16.37086 06 30 33.12 -04 52 59.5          20.3 RUEF012474
 
Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.84-m f/3.5 reflector
    + CCD.
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.
691 Steward Observatory, Kitt Peak.  Observer J. V. Scotti.  0.9-m f/3
    reflector + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  1.00-m f/10.0 astrograph
    + CCD.
C51 WISE.  Measurers A. K. Mainzer, J. M. Bauer, T. Grav, J. R. Masiero,
    J. W. Dailey, R. M. Cutri, E. L. Wright, C. Nugent, S. Sonnett, E. Kramer.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.61-m f/4.5
    astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer D. C. Fuls.  Measurers
    B. M. Africano, E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
    J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman,
    F. C. Shelly.  1.0-m reflector + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
 
Orbital elements:
2018 EN4
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M 359.24076              (2000.0)            P               Q
n   0.00995639     Peri.   34.58706     -0.64999650     +0.32605155
a  21.3993925      Node   136.07139     +0.24623849     -0.76418269
e   0.9320934      Incl.   81.66660     +0.71893752     +0.55652062
P  98.99           H   17.3           G   0.15           U   6
Residuals in seconds of arc
180309 C51  0.2+  0.3+    180313 691  1.2+  0.2+    180314 I52  0.2-  0.4-
180309 C51  0.6-  0.0     180313 691  0.3-  0.2+    180314 I52  0.5-  0.2+
180309 C51  0.7-  0.0     180313 204  0.4+  0.0     180315 Q62  0.0   0.0
180309 C51  1.7+  0.0     180313 204  0.2-  0.5+    180315 Q62  0.0   0.0
180309 C51  0.9-  0.5-    180314 H21  0.1-  0.3-    180315 Q62  0.2-  0.0
180313 807  0.0   0.5+    180314 H21  0.4-  0.1-    180316 474  0.3-  0.4+
180313 807  0.1-  0.5+    180314 H21  0.3-  0.3-    180316 474  0.3+  0.4-
180313 807  0.1-  0.3+    180314 I52  1.9-  0.2-    180316 474  0.8+  0.1+
180313 691  0.8+  0.7-    180314 I52  0.5-  0.1-

Ephemeris:
2018 EN4                 a,e,i = 21.40, 0.93, 82                 q = 1.4532
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 02 14    07 03 06.1 -32 02 34   1.4130  2.0878   119.8    24.2    20.8
...
2018 03 01    06 41 21.8 -19 21 09   1.3346  1.9575   113.8    27.6    20.6
...
2018 03 09    06 34 18.8 -11 49 46   1.3315  1.8909   108.0    30.0    20.6
...
2018 03 15    06 31 03.7 -06 09 49   1.3460  1.8426   102.8    31.7    20.6
2018 03 16    06 30 40.9 -05 13 48   1.3497  1.8347   101.9    32.0    20.6
2018 03 17    06 30 20.9 -04 18 05   1.3538  1.8268   101.0    32.3    20.6
...
2018 03 23    06 29 15.8 +01 08 31   1.3849  1.7808    95.4    33.9    20.7
...
2018 03 31    06 30 05.4 +07 56 55   1.4417  1.7225    87.8    35.4    20.7
...
2018 04 15    06 37 42.5 +19 03 09   1.5789  1.6245    74.2    36.5    20.8

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-F12



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