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    • MPEC 2018-G119: 2018 GQ4

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    M.P.E.C. 2018-G119                               Issued 2018 Apr. 15, 16:50 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 GQ4

Observations:
     K18G04Q* C2018 04 12.27501 12 57 04.62 +13 05 04.6          21.1 GUEG119G96
     K18G04Q  C2018 04 12.28014 12 57 02.43 +13 04 20.6          21.6 GUEG119G96
     K18G04Q  C2018 04 12.29047 12 56 58.02 +13 02 54.0          21.6 GUEG119G96
     K18G04Q  C2018 04 12.33652 12 56 41.126+12 56 34.93         21.7 wUEG119F51
     K18G04Q  C2018 04 12.33803 12 56 40.493+12 56 22.38         21.5 wUEG119F51
     K18G04Q  C2018 04 12.36399 12 56 29.592+12 52 44.60         21.6 wUEG119F51
     K18G04Q  C2018 04 12.37693 12 56 24.120+12 50 55.39         21.6 wUEG119F51
     K18G04Q  C2018 04 13.25605 12 50 33.84 +10 46 42.6          21.9 GUEG119I52
     K18G04Q  C2018 04 13.26524 12 50 30.04 +10 45 24.5          21.4 GUEG119I52
     K18G04Q  C2018 04 13.27247 12 50 27.03 +10 44 23.2          21.9 GUEG119I52
     K18G04Q  C2018 04 13.27887 12 50 24.44 +10 43 28.8          21.6 GUEG119I52
     K18G04Q KC2018 04 14.28899 12 43 50.76 +08 20 19.5          21.5 RoEG119291
     K18G04Q KC2018 04 14.29242 12 43 49.36 +08 19 50.4          21.2 RoEG119291
     K18G04Q KC2018 04 14.29587 12 43 48.00 +08 19 21.3          21.6 RoEG119291

Observer details:
291 LPL/Spacewatch II.  Observer R. A. Mastaler.  1.8-m f/2.7 reflector + 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.
G96 Mt. Lemmon Survey.  Observer G. J. Leonard.  Measurers B. M. Africano,
    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. L. Seaman, F. C. Shelly.
    1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer E. J. Christensen.
    Measurers B. M. Africano, 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. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.

Orbital elements:
2018 GQ4                                                 Earth MOID = 0.1658 AU
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M   9.53958              (2000.0)            P               Q
n   0.61270431     Peri.  143.53591     -0.94970642     -0.24169726
a   1.3728890      Node    24.84781     +0.01366471     -0.66719091
e   0.1713286      Incl.   28.28173     +0.31284339     -0.70458408
P   1.61           H   24.1           G   0.15           U   8
Residuals in seconds of arc
180412 G96  0.5+  0.2+    180412 F51  0.3+  0.3+    180413 I52  0.4+  0.1-
180412 G96  0.1+  0.6-    180412 F51  0.1+  0.0     180414 291  0.0   0.1-
180412 G96  0.8-  0.2-    180413 I52  0.1+  0.0     180414 291  0.2-  0.0
180412 F51  0.2-  0.1-    180413 I52  0.0   0.1-    180414 291  0.2+  0.2+
180412 F51  0.1-  0.0     180413 I52  0.4-  0.1-

Ephemeris:
2018 GQ4                 a,e,i = 1.37, 0.17, 28                  q = 1.1377
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 03 16    15 36 12.2 +46 57 33   0.2933  1.1391   112.4    53.8    23.7
...
2018 03 31    14 21 41.6 +36 05 07   0.2048  1.1484   133.0    39.5    22.5
...
2018 04 08    13 26 38.2 +22 37 51   0.1759  1.1567   149.9    25.7    21.8
...
2018 04 14    12 45 42.8 +09 01 44   0.1713  1.1644   158.9    18.0    21.5
2018 04 15    12 39 20.4 +06 40 11   0.1722  1.1657   159.2    17.8    21.5
2018 04 16    12 33 08.7 +04 19 40   0.1736  1.1672   158.9    18.0    21.6
...
2018 04 22    12 00 20.2 -08 37 09   0.1916  1.1763   151.0    24.5    22.0
...
2018 04 30    11 29 00.6 -21 19 50   0.2350  1.1901   137.1    35.2    22.8
...
2018 05 15    11 01 28.3 -34 11 36   0.3455  1.2200   119.8    45.9    24.0

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-G119

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