[Iaude] MPEC E74: 2018 ER2 [a=2.01,e=0.40,i=3.9,H=24.3]

[mpec at mpcdb1.cfa.harvard.edu]

M.P.E.C. 2018-E74                                Issued 2018 Mar. 12, 14:37 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 ER2
 
Observations:
     K18E02R* C2018 03 07.33229 11 26 16.638+18 16 01.59         22.1 wUEE074F51
     K18E02R  C2018 03 07.34395 11 26 16.985+18 15 44.91         22.2 wUEE074F51
     K18E02R  C2018 03 07.35558 11 26 17.357+18 15 28.30         22.1 wUEE074F51
     K18E02R  C2018 03 07.36723 11 26 17.688+18 15 11.44         22.3 wUEE074F51
     K18E02R |C2018 03 08.25218 11 26 54.04 +17 53 50.1          21.7 GUEE074807
     K18E02R |C2018 03 08.25966 11 26 54.28 +17 53 38.9          21.8 GUEE074807
     K18E02R |C2018 03 08.26732 11 26 54.47 +17 53 27.0          21.9 GUEE074807
     K18E02R |C2018 03 12.17167 11 29 35.74 +16 13 59.9          22.1 GUEE074807
     K18E02R |C2018 03 12.18083 11 29 35.97 +16 13 45.9          22.0 GUEE074807
     K18E02R |C2018 03 12.18999 11 29 36.18 +16 13 31.6          21.9 GUEE074807
 
Observer details:
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  1.00-m f/10.0 astrograph
    + CCD.
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. Magnier, Y. Ramanjooloo, R. Wainscoat, C. Waters, R. Weryk.
    1.8-m Ritchey-Chretien + CCD.
 
Orbital elements:
2018 ER2                                                 Earth MOID = 0.2118 AU
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M   9.50316              (2000.0)            P               Q
n   0.34708935     Peri.  132.57693     -0.91066088     -0.41227459
a   2.0052808      Node    23.11468     +0.35610346     -0.81631664
e   0.4038136      Incl.    3.93676     +0.20949245     -0.40454517
P   2.84           H   24.3           G   0.15           U   8
Residuals in seconds of arc
180307 F51  0.1-  0.2+    180308 807  0.3-  0.2+    180312 807  0.1-  0.2+
180307 F51  0.4-  0.2+    180308 807  0.2+  0.3+    180312 807  0.3-  0.1+
180307 F51  0.1-  0.2+    180308 807  0.2-  0.0
180307 F51  0.3-  0.1+    180312 807  0.2-  0.1+

Ephemeris:
2018 ER2                 a,e,i = 2.01, 0.40, 4                   q = 1.1955
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 02 10    10 59 11.7 +25 56 30   0.2316  1.2032   156.9    18.8    22.5
...
2018 02 25    11 17 28.8 +22 07 32   0.2134  1.1956   163.1    14.0    22.1
...
2018 03 05    11 24 29.2 +19 12 32   0.2128  1.1992   165.9    11.6    22.0
...
2018 03 11    11 28 48.6 +16 43 47   0.2165  1.2053   167.1    10.6    22.1
2018 03 12    11 29 28.5 +16 17 59   0.2175  1.2066   167.2    10.5    22.1
2018 03 13    11 30 07.6 +15 51 58   0.2186  1.2080   167.3    10.5    22.1
...
2018 03 19    11 33 53.1 +13 12 52   0.2275  1.2180   166.7    10.9    22.2
...
2018 03 27    11 38 57.1 +09 40 08   0.2456  1.2354   163.8    13.0    22.5
...
2018 04 11    11 50 15.0 +03 34 01   0.2988  1.2798   155.4    19.0    23.2

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-E74