• MPC Preparation (Info)

    • MPEC 2018-R134: 2018 RR4

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    M.P.E.C. 2018-R134                               Issued 2018 Sept. 12, 15:29 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 RR4

Observations:
     K18R04R  C2018 09 11.37271 23 21 22.29 -23 27 00.7                UER134I41
     K18R04R  C2018 09 11.37305 23 21 24.08 -23 26 45.0                UER134I41
     K18R04R  C2018 09 11.40008 23 23 41.81 -23 08 13.4          18.54gUER134I41
     K18R04R  C2018 09 11.40043 23 23 43.34 -23 08 01.0          18.54gUER134I41
     K18R04R* C2018 09 11.51476 23 35 07.55 -21 31 07.1          18.0 VmER134Q66
     K18R04R  C2018 09 11.51615 23 35 14.94 -21 30 06.7          18.0 VmER134Q66
     K18R04R  C2018 09 11.64313 23 46 51.59 -19 49 02.9          18.5 VmER134Q66
     K18R04R  C2018 09 11.64452 23 46 59.46 -19 47 52.4          18.5 VmER134Q66
     K18R04R KC2018 09 11.94739900 18 58.60 -15 22 23.2          17.6 GVER134L01
     K18R04R KC2018 09 11.94908400 19 09.13 -15 20 39.6          17.4 GVER134L01
     K18R04R KC2018 09 11.94992400 19 14.34 -15 19 48.2          17.4 GVER134L01
     K18R04R KC2018 09 11.95083600 19 20.06 -15 18 51.6          17.6 GVER134L01
     K18R04R KC2018 09 11.95154500 19 24.44 -15 18 08.4          17.3 GVER134L01
     K18R04R  C2018 09 12.29658 00 58 15.38 -08 46 51.9          17.4 G ER134I52
     K18R04R  C2018 09 12.29668 00 58 16.07 -08 46 44.2          17.1 G ER134I52
     K18R04R  C2018 09 12.29678 00 58 16.74 -08 46 36.9          17.3 G ER134I52
     K18R04R  C2018 09 12.29689 00 58 17.42 -08 46 29.7          17.3 G ER134I52

Observer details:
I41 Palomar Mountain--ZTF.  Measurer Q.-Z. Ye.  1.2-m f/2.44 Oschin Schmidt
    + ZTF camera.
I52 Steward Observatory, Mt. Lemmon Station.  Observer E. J. Christensen.
    Measurers B. M. Africano, E. J. Christensen, G. A. Farneth, D. C. Fuls,
    A. R. Gibbs, A. D. Grauer, H. Groeller, J. A. Johnson, R. A. Kowalski,
    S. M. Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly.  1.0-m reflector
    + CCD.
L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
    + CCD.
Q66 Siding Spring-Janess-G, JAXA.  Observers T. Yanagisawa, H. Kurosaki,
    K. Kamiya, H. Onodera.  0.25-m f/2.8 reflector + CCD.

Orbital elements:
2018 RR4                                                 Earth MOID = 0.0024 AU
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M 317.37904              (2000.0)            P               Q
n   0.22846294     Peri.   14.44813     +0.99464758     -0.10300206
a   2.6500793      Node   351.45140     +0.08850496     +0.89011996
e   0.6233192      Incl.    3.15115     +0.05332040     +0.44393358
P   4.31           H   27.1           G   0.15           U   6
Residuals in seconds of arc
180911 I41  0.1-  1.2-    180911 Q66 (2.1-  0.2-)   180911 L01  0.2-  0.1-
180911 I41  0.9+  0.8+    180911 Q66  1.3-  0.4-    180912 I52  0.0   0.3-
180911 I41 (2.9+  1.4+)   180911 L01  0.1+  0.0     180912 I52  0.5+  0.2+
180911 I41  0.8-  0.8-    180911 L01  0.4+  0.1+    180912 I52  0.7+  0.3+
180911 Q66 (5.2+  2.1+)   180911 L01  0.0   0.1-    180912 I52  0.1+  0.4-
180911 Q66 (3.8+  0.4+)   180911 L01  0.4+  0.3+

Ephemeris:
2018 RR4                 a,e,i = 2.65, 0.62, 3                   q = 0.9982
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 08 13    19 45 26.0 -34 36 46   0.1604  1.1542   149.4    26.6    24.6
...
2018 08 28    19 48 46.7 -35 43 50   0.08036 1.0696   136.1    40.9    23.4
...
2018 09 05    20 15 54.5 -35 49 13   0.03953 1.0361   133.8    44.6    21.9
...
2018 09 11    22 50 55.4 -26 47 22   0.01143 1.0174   157.2    22.6    18.5
2018 09 12    00 24 21.3 -14 13 59   0.0087271.0149   161.2    18.7    17.8
2018 09 13    02 17 08.3 +05 45 56   0.0086031.0125   135.4    44.2    18.5
...
2018 09 19    06 08 07.1 +33 44 10   0.03396 1.0018    84.1    93.9    23.1
...
2018 09 27    06 45 41.7 +35 15 41   0.07363 0.9977    84.2    91.6    24.7
...
2018 10 12    07 02 56.7 +35 41 26   0.1445  1.0214    95.2    76.7    25.6

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-R134

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