[Iaude] MPEC E12: 2018 DB4 [a=1.69,e=0.41,i=4.3,H=24.5]

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Sun Mar 4 12:43:16 EST 2018


M.P.E.C. 2018-E12                                Issued 2018 Mar. 4, 17:39 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 DB4
 
Observations:
     K18D04B* C2018 02 26.40256 12 08 52.34 -05 50 42.7          20.7 GUEE012G96
     K18D04B  C2018 02 26.40786 12 08 54.90 -05 50 47.2          20.4 GUEE012G96
     K18D04B  C2018 02 26.41317 12 08 57.58 -05 50 52.4                UEE012G96
     K18D04B  C2018 02 26.41848 12 09 00.26 -05 50 55.0                UEE012G96
     K18D04B  C2018 02 26.48788 12 09 35.15 -05 51 49.3          20.6 GUEE012I52
     K18D04B  C2018 02 26.48954 12 09 35.96 -05 51 50.3          20.3 GUEE012I52
     K18D04B  C2018 02 26.49121 12 09 36.86 -05 51 51.3          20.5 GUEE012I52
     K18D04B  C2018 02 26.49287 12 09 37.70 -05 51 52.5          20.0 GUEE012I52
     K18D04B KC2018 02 27.32108 12 17 20.85 -06 02 52.2          20.6 RoEE012291
     K18D04B KC2018 02 27.32802 12 17 24.60 -06 02 58.0          20.5 RoEE012291
     K18D04B KC2018 02 27.33489 12 17 28.31 -06 03 03.7          20.6 RoEE012291
     K18D04B |C2018 03 01.28086 12 37 30.17 -06 26 51.7          20.2 GUEE012807
     K18D04B |C2018 03 01.28505 12 37 32.80 -06 26 55.0          20.1 GUEE012807
     K18D04B |C2018 03 01.28935 12 37 35.51 -06 26 58.2          20.2 GUEE012807
 
Observer details:
291 LPL/Spacewatch II.  Observer M. J. Brucker.  1.8-m f/2.7 reflector + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  1.00-m f/10.0 astrograph
    + CCD.
G96 Mt. Lemmon Survey.  Observer G. J. Leonard.  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 R. A. Kowalski.
    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.
 
Orbital elements:
2018 DB4                                                 Earth MOID = 0.0249 AU
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M 353.56814              (2000.0)            P               Q
n   0.44972902     Peri.   38.53137     -0.91605531     +0.40058862
a   1.6872086      Node   165.04836     -0.38398242     -0.86218263
e   0.4145272      Incl.    4.28387     -0.11575909     -0.31011268
P   2.19           H   24.5           G   0.15           U   8
Residuals in seconds of arc
180226 G96  0.6+  0.2+    180226 I52  0.6-  0.0     180227 291  0.1+  0.0
180226 G96  0.6-  0.1-    180226 I52  0.2+  0.3+    180301 807  0.1+  0.0
180226 G96  0.1-  1.2-    180226 I52  0.1+  0.3+    180301 807  0.1-  0.1-
180226 G96  0.4+  0.4+    180227 291  0.1-  0.2+    180301 807  0.0   0.0
180226 I52  0.1-  0.3-    180227 291  0.0   0.1+

Ephemeris:
2018 DB4                 a,e,i = 1.69, 0.41, 4                   q = 0.9878
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 02 02    10 25 52.5 -01 10 52   0.2321  1.1959   152.3    22.5    22.8
...
2018 02 17    11 09 51.8 -03 53 12   0.1401  1.1180   156.5    20.6    21.5
...
2018 02 25    11 57 09.0 -05 31 20   0.1010  1.0815   154.0    23.6    20.8
...
2018 03 03    12 57 56.3 -06 48 56   0.07840 1.0572   146.1    31.5    20.4
2018 03 04    13 11 05.5 -07 00 23   0.07543 1.0535   144.0    33.5    20.4
2018 03 05    13 25 11.7 -07 10 41   0.07274 1.0498   141.7    35.8    20.4
...
2018 03 11    15 06 31.8 -07 27 14   0.06380 1.0297   123.3    53.8    20.6
...
2018 03 19    17 19 36.5 -05 28 03   0.07273 1.0085    98.2    77.7    21.5
...
2018 04 03    19 23 26.3 -01 53 39   0.1228  0.9885    81.3    91.7    23.2

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-E12



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