[Iaude] MPEC J150: 2021 GW9 [a=1.69,e=0.24,i=2.0,H=21.8]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Mon May 10 14:42:04 EDT 2021


M.P.E.C. 2021-J150                                 Issued 2021 May 10, 18:40 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

                                    2021 GW9                                    


                           Revision to MPEC 2021-G200                           

Additional Observations:
     K21G09W  C1999 03 20.30417012 06 46.345+00 48 19.15         20.63VeEJ150645
     K21G09W  C1999 03 20.30764212 06 46.165+00 48 21.16         21.35 eEJ150645
     K21G09W  C1999 03 22.29779012 05 22.061+01 07 16.28         20.72VeEJ150645
     K21G09W  C1999 03 22.30126212 05 21.882+01 07 18.19         21.34 eEJ150645
     K21G09W  C2010 04 10.30373 13 14 15.82 -04 20 27.2          20.9 VrEJ150G96
     K21G09W  C2010 04 10.31264 13 14 15.21 -04 20 22.3          20.9 VrEJ150G96
     K21G09W  C2010 04 10.32156 13 14 14.64 -04 20 17.4          20.5 VrEJ150G96
     K21G09W  C2010 04 10.33044 13 14 13.99 -04 20 13.2          20.9 VrEJ150G96

Observer details:
645 Apache Point-Sloan Digital Sky Survey.  Observer SDSS Collaboration.
    Measurers Z. Ivezic, M. Juric, R. H. Lupton, S. Tabachnik, T. Quinn.
    2.50-m reflector + CCD.
G96 Mt. Lemmon Survey.  Observers R. A. Kowalski, G. M. Hupe.  Measurers J. D.
    Ahern, E. C. Beshore, A. Boattini, G. J. Garradd, A. R. Gibbs, A. D.
    Grauer, R. E. Hill, R. A. Kowalski, S. M. Larson, R. H. McNaught.  1.5-m
    reflector + CCD.

Orbital elements:
2021 GW9                                                 Earth MOID = 0.2913 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 357.54891              (2000.0)            P               Q
n   0.44919236     Peri.  323.31257     -0.66448022     -0.74727396
a   1.6885521      Node   168.32449     +0.69349248     -0.62004717
e   0.2442971      Incl.    1.95511     +0.27844966     -0.23900448
P   2.19           H   21.8           G   0.15           U   3
Residuals in seconds of arc
990320 645  0.0   0.0     210411 807  0.0   0.1-    210414 033  0.8+  0.5-
990320 645  0.0   0.0     210411 807  0.1+  0.0     210414 033  0.1+  0.9-
990322 645  0.1+  0.0     210411 807  0.1-  0.1+    210420 V06  0.0   0.1+
990322 645  0.0   0.0     210411 H01  0.0   0.0     210420 V06  0.1-  0.1+
100410 G96  0.2+  0.2-    210411 H01  0.3-  0.1-    210420 V06  0.4-  0.2+
100410 G96  0.1-  0.0     210411 H01  0.1-  0.1-    210420 V06  0.3-  0.2+
100410 G96  0.2+  0.3+    210411 H01  0.0   0.3-    210508 F51  0.1+  0.0
100410 G96  0.7-  0.1-    210413 H01  0.0   0.1+    210508 F51  0.2-  0.2-
210410 F51  0.0   0.2+    210413 H01  0.1-  0.1-    210508 F51  0.1+  0.1+
210410 F51  0.0   0.0     210413 H01  0.1+  0.1+
210410 F51  0.1+  0.1+    210413 H01  0.0   0.0

Ephemeris:
2021 GW9                 a,e,i = 1.69, 0.24, 2                   q = 1.2760
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 04 10    14 24 24.9 -10 36 35   0.5024  1.4885   162.4    11.7    21.9
...
2021 04 25    14 06 28.3 -08 31 07   0.5327  1.5375   175.3     3.0    21.7
...
2021 05 03    13 57 52.1 -07 38 22   0.5654  1.5640   166.9     8.4    22.1
...
2021 05 09    13 52 41.3 -07 09 39   0.5973  1.5840   160.0    12.6    22.4
2021 05 10    13 51 57.2 -07 05 53   0.6032  1.5873   158.9    13.3    22.5
2021 05 11    13 51 15.6 -07 02 24   0.6093  1.5907   157.7    13.9    22.5
...
2021 05 17    13 47 58.0 -06 47 52   0.6490  1.6107   151.2    17.6    22.8
...
2021 05 25    13 45 56.5 -06 44 57   0.7102  1.6372   143.1    21.8    23.2
...
2021 06 09    13 48 53.8 -07 22 46   0.8459  1.6863   129.7    27.6    23.8

A. U. Tomatic                (C) Copyright 2021 MPC           M.P.E.C. 2021-J150




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