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    • MPEC 2012-D69 : 2012 DF31

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    M.P.E.C. 2012-D69                                Issued 2012 Feb. 26, 21:00 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 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

                                   2012 DF31

Observations:
     K12D31F* C2012 02 24.35435 10 44 21.37 +18 05 14.7          21.6 VrED069G96
     K12D31F  C2012 02 24.36297 10 44 18.99 +18 05 47.6          20.6 VrED069G96
     K12D31F  C2012 02 24.37168 10 44 16.62 +18 06 20.6          21.3 VrED069G96
     K12D31F  C2012 02 24.38039 10 44 14.20 +18 06 54.1          20.9 VrED069G96
     K12D31F mC2012 02 24.39850 10 44 09.27 +18 08 03.6                oED069291
     K12D31F mC2012 02 24.40073 10 44 08.66 +18 08 12.0                oED069291
     K12D31F mC2012 02 24.40297 10 44 08.07 +18 08 20.1                oED069291
     K12D31F KC2012 02 25.06149 10 41 14.84 +18 51 44.0          20.8 RuED069204
     K12D31F KC2012 02 25.09285 10 41 05.58 +18 53 52.0                uED069204
     K12D31F  C2012 02 25.23418 10 40 30.06 +19 03 54.6          20.2 RoED069H01
     K12D31F  C2012 02 25.24196 10 40 27.69 +19 04 27.6          20.2 RoED069H01
     K12D31F  C2012 02 25.25031 10 40 25.15 +19 05 03.0          20.1 RoED069H01
     K12D31F  C2012 02 25.26132 10 40 21.78 +19 05 49.8          19.8 RoED069H01
     K12D31F  C2012 02 26.25106 10 35 22.27 +20 19 05.0          20.7 RoED069H01
     K12D31F  C2012 02 26.25962 10 35 19.25 +20 19 45.3          19.9 RoED069H01
     K12D31F  C2012 02 26.26738 10 35 16.52 +20 20 22.0          20.2 RoED069H01
     K12D31F  C2012 02 26.27317 10 35 14.49 +20 20 49.3          20.3 RoED069H01
     K12D31F KC2012 02 26.33076410 34 52.90 +20 25 11.7          21.1 VuED069H21
     K12D31F KC2012 02 26.33861310 34 50.15 +20 25 48.5          20.9 VuED069H21
     K12D31F KC2012 02 26.34919510 34 46.44 +20 26 37.7          20.7 VuED069H21

Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.60-m f/4.64 reflector
    + CCD.
291 LPL/Spacewatch II.  Observer R. S. McMillan.  1.8-m f/2.7 reflector + CCD.
G96 Mt. Lemmon Survey.  Observer R. A. Kowalski.  Measurers J. D. Ahern,
    E. C. Beshore, A. Boattini, A. R. Gibbs, A. D. Grauer, R. E. Hill,
    R. A. Kowalski, S. M. Larson, R. H. McNaught.  1.5-m reflector + CCD.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 reflector + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers T. Vorobjov, L. Buzzi, S. Foglia.  0.61-m f/4.5 astrograph + CCD.

Orbital elements:
2012 DF31                                                Earth MOID = 0.0233 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
M 311.25383              (2000.0)            P               Q
n   0.84588127     Peri.  164.43710     +0.08517662     +0.99602590
a   1.1072944      Node   110.44351     -0.91708648     +0.08858325
e   0.4746220      Incl.    1.59161     -0.38948341     +0.00924205
P   1.17           H   24.4           G   0.15           U   8
Residuals in seconds of arc
120224 G96  0.0   0.3-    120225 204  0.2+  0.5-    120226 H01  0.1-  0.2+
120224 G96  0.1-  0.2-    120225 204  0.3-  0.3-    120226 H01  0.2-  0.2+
120224 G96  0.2+  0.3-    120225 H01  0.1-  0.1+    120226 H01  0.1-  0.1+
120224 G96  0.1-  0.1+    120225 H01  0.1-  0.1+    120226 H21  0.1+  0.3-
120224 291  0.1-  0.3+    120225 H01  0.0   0.0     120226 H21  0.1+  0.1-
120224 291  0.1-  0.2+    120225 H01  0.0   0.0     120226 H21  0.1+  0.3-
120224 291  0.3+  0.2-    120226 H01  0.2+  0.4+

Ephemeris:
2012 DF31                a,e,i = 1.11, 0.47, 2                   q = 0.5817
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2012 01 27    11 14 32.3 +07 28 20   0.4015  1.3163   139.6    29.0    24.3
...
2012 02 11    11 11 49.6 +10 05 11   0.2504  1.2199   156.1    19.1    22.8
...
2012 02 19    11 00 41.0 +13 41 34   0.1787  1.1630   166.7    11.3    21.7
...
2012 02 25    10 41 33.3 +18 48 01   0.1299  1.1179   170.2     8.7    20.8
2012 02 26    10 36 41.0 +20 00 00   0.1223  1.1102   169.1     9.7    20.7
2012 02 27    10 31 04.8 +21 20 17   0.1148  1.1025   167.3    11.4    20.6
...
2012 03 04    09 29 22.3 +33 28 26   0.07535 1.0548   145.8    31.9    20.3
...
2012 03 12    04 33 53.8 +46 50 12   0.05613 0.9884    83.0    93.7    21.5
...
2012 03 27    00 47 51.1 +15 03 12   0.1446  0.8581    13.8   163.9    32.5

A. U. Tomatic                (C) Copyright 2012 MPC           M.P.E.C. 2012-D69

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