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    • MPEC 2018-B28 : 2018 AJ12

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    M.P.E.C. 2018-B28                                Issued 2018 Jan. 17, 23:42 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@CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                   2018 AJ12

Observations:
     K18A12J* C2018 01 14.44218 11 47 57.07 +17 21 31.7          21.1 GUEB028G96
     K18A12J  C2018 01 14.44735 11 47 56.84 +17 21 37.6          21.0 GUEB028G96
     K18A12J  C2018 01 14.45251 11 47 56.48 +17 21 42.3          21.3 GUEB028G96
     K18A12J  C2018 01 14.45766 11 47 56.18 +17 21 48.6          20.9 GUEB028G96
     K18A12J  C2018 01 14.49658 11 47 54.154+17 22 33.31         21.3 wUEB028F51
     K18A12J  C2018 01 14.51012 11 47 53.307+17 22 48.44         21.4 wUEB028F51
     K18A12J  C2018 01 14.52361 11 47 52.464+17 23 03.48         21.3 wUEB028F51
     K18A12J  C2018 01 14.53712 11 47 51.611+17 23 18.63         21.2 wUEB028F51
     K18A12J  C2018 01 14.53905 11 47 51.04 +17 23 19.2          20.8 GUEB028I52
     K18A12J  C2018 01 14.54154 11 47 50.87 +17 23 21.6          21.1 GUEB028I52
     K18A12J  C2018 01 14.54403 11 47 50.73 +17 23 24.3          20.8 GUEB028I52
     K18A12J  C2018 01 14.54653 11 47 50.55 +17 23 27.1          20.5 GUEB028I52
     K18A12J KC2018 01 15.05837611 47 20.383+17 32 56.94         20.6 GUEB028J04
     K18A12J KC2018 01 15.06498511 47 19.890+17 33 04.05         21.2 GUEB028J04
     K18A12J KC2018 01 15.07159511 47 19.447+17 33 11.48         21.4 GUEB028J04
     K18A12J KC2018 01 15.40571 11 46 58.53 +17 39 24.5                oEB028711
     K18A12J KC2018 01 15.41034 11 46 58.08 +17 39 29.9                oEB028711
     K18A12J KC2018 01 15.41386 11 46 57.99 +17 39 34.5                oEB028711
     K18A12J KC2018 01 17.03849911 45 12.580+18 09 59.23         20.5 GUEB028J04
     K18A12J KC2018 01 17.04510911 45 12.116+18 10 06.82         20.3 GUEB028J04

Observer details:
711 McDonald Observatory.  Observer J. G. Ries.  2.1-m reflector + CCD + focal
    reducer.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
    M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
    M. Huber, E. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk.  1.8-m
    Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observer A. R. Gibbs.  Measurers 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. G. Matheny, R. L. Seaman, F. C. Shelly.
    1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer J. A. Johnson.
    Measurers 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. G. Matheny,
    R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.
J04 ESA Optical Ground Station, Tenerife.  Observer P. Ruiz.  Measurers
    M. Micheli, D. Koschny, M. Busch, E. Schwab, A. Knoefel.  1.0-m f/4.4
    reflector + CCD.

Orbital elements:
2018 AJ12                                           PHA, Earth MOID = 0.0259 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
M 352.08595              (2000.0)            P               Q
n   0.25303059     Peri.  290.06470     +0.88601682     -0.42142651
a   2.4756393      Node    95.27135     +0.46364762     +0.80328801
e   0.7370680      Incl.   11.19474     +0.00225345     +0.42086586
P   3.90           H   19.0           G   0.15           U   8
Residuals in seconds of arc
180114 G96  0.8-  0.2+    180114 F51  0.0   0.0     180115 J04  0.5-  0.1+
180114 G96  0.5+  0.4+    180114 I52  0.3+  0.2+    180115 711  0.1+  0.5-
180114 G96  0.0   0.7-    180114 I52  0.1+  0.1-    180115 711 (1.9-  0.3-)
180114 G96  0.4+  0.1-    180114 I52  0.3+  0.2-    180115 711  0.1+  0.4+
180114 F51  0.1-  0.1+    180114 I52  0.0   0.1-    180117 J04  0.0   0.0
180114 F51  0.1-  0.0     180115 J04  0.9+  0.4+    180117 J04  0.1-  0.0
180114 F51  0.0   0.0     180115 J04  0.2-  0.1+

Ephemeris:
2018 AJ12                a,e,i = 2.48, 0.74, 11                  q = 0.6509
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2017 12 18    11 55 01.5 +10 24 50   0.9008  1.3491    91.3    46.8    21.2
...
2018 01 02    11 56 00.5 +13 47 28   0.9028  1.5203   107.3    38.1    21.2
...
2018 01 10    11 51 48.0 +16 01 07   0.9033  1.6086   116.9    33.0    21.2
...
2018 01 16    11 46 20.7 +17 50 32   0.9067  1.6735   124.5    29.0    21.2
2018 01 17    11 45 14.7 +18 09 18   0.9076  1.6842   125.8    28.3    21.2
2018 01 18    11 44 05.5 +18 28 10   0.9087  1.6949   127.1    27.6    21.2
...
2018 01 24    11 36 06.2 +20 22 22   0.9185  1.7581   135.0    23.3    21.1
...
2018 02 01    11 22 57.5 +22 50 44   0.9424  1.8404   145.4    17.7    21.1
...
2018 02 16    10 53 55.8 +26 38 53   1.0302  1.9891   160.5     9.5    21.2

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-B28

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