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  • MPEC 2017-W20 : 2017 WB

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    M.P.E.C. 2017-W20                                Issued 2017 Nov. 17, 14:35 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
    
                                        2017 WB
    
    Observations:
         K17W00B* C2017 11 16.20351 00 29 20.58 -18 47 28.4                UEW020703
         K17W00B  C2017 11 16.21451 00 30 01.23 -18 46 47.6          18.2 GUEW020703
         K17W00B  C2017 11 16.22001 00 30 21.47 -18 46 27.1          17.9 GUEW020703
         K17W00B  C2017 11 16.23565 00 31 19.48 -18 45 28.0          18.3 GUEW020703
         K17W00B  C2017 11 16.23606 00 31 20.95 -18 45 26.3          18.2 GUEW020703
         K17W00B  C2017 11 16.23646 00 31 22.43 -18 45 25.1          18.2 GUEW020703
         K17W00B  C2017 11 16.23686 00 31 24.01 -18 45 23.4          18.8 GUEW020703
         K17W00B  C2017 11 16.26063 00 32 52.07 -18 43 49.1          18.5 GUEW020I52
         K17W00B  C2017 11 16.26098 00 32 53.37 -18 43 47.2                UEW020I52
         K17W00B  C2017 11 16.26134 00 32 54.71 -18 43 46.2          18.5 GUEW020I52
         K17W00B  C2017 11 16.26170 00 32 56.02 -18 43 45.2                UEW020I52
         K17W00B  C2017 11 16.28018 00 34 04.65 -18 42 27.5          17.8 GUEW020I52
         K17W00B  C2017 11 16.28042 00 34 05.52 -18 42 26.4          17.9 GUEW020I52
         K17W00B  C2017 11 16.28090 00 34 07.35 -18 42 24.1          17.9 GUEW020I52
         K17W00B  C2017 11 16.39515800 41 42.00 -18 25 51.0          18.3 RUEW020474
         K17W00B  C2017 11 16.39553700 41 43.37 -18 25 49.5          18.2 RUEW020474
         K17W00B  C2017 11 16.39607700 41 45.34 -18 25 47.0          18.1 RUEW020474
         K17W00B  C2017 11 16.39661600 41 47.28 -18 25 44.7          18.0 RUEW020474
         K17W00B  C2017 11 16.39715800 41 49.31 -18 25 43.0          17.9 RUEW020474
         K17W00B KC2017 11 16.51125000 48 46.24 -18 16 39.7          18.4 RUEW020474
         K17W00B KC2017 11 16.51179000 48 48.20 -18 16 36.6          18.8 RUEW020474
         K17W00B KC2017 11 16.51233100 48 50.19 -18 16 33.4          19.1 RUEW020474
         K17W00B KC2017 11 16.51314300 48 53.17 -18 16 29.7          19.1 RUEW020474
         K17W00B KC2017 11 16.79803 01 06 48.39 -18 01 09.0          17.5 RoEW020K51
         K17W00B KC2017 11 16.79956 01 06 53.78 -18 01 00.9          17.9 RoEW020K51
         K17W00B KC2017 11 16.80105 01 06 58.94 -18 00 52.4          18.0 RoEW020K51
         K17W00B KC2017 11 16.84564 01 09 34.55 -17 56 21.3          18.3 RUEW020104
         K17W00B KC2017 11 16.85256 01 09 58.54 -17 55 39.4          18.6 RUEW020104
         K17W00B KC2017 11 16.85602 01 10 10.47 -17 55 18.6          17.7 RUEW020104
         K17W00B KC2017 11 16.86046601 10 38.568-17 53 24.14         18.3 GUEW020J04
         K17W00B KC2017 11 16.86116701 10 40.975-17 53 20.01         18.0 GUEW020J04
         K17W00B KC2017 11 16.86186801 10 43.388-17 53 16.27         18.1 GUEW020J04
         K17W00B KC2017 11 16.88498 01 11 49.37 -17 52 23.7          18.2 VqEW020595
         K17W00B KC2017 11 16.89064 01 12 08.88 -17 51 47.0                qEW020595
         K17W00B KC2017 11 16.90183 01 12 47.44 -17 50 35.6          18.1 VqEW020595
         K17W00B KC2017 11 16.94180901 15 10.40 -17 46 39.8                UEW020J95
         K17W00B KC2017 11 16.94438101 15 19.17 -17 46 22.8                UEW020J95
         K17W00B KC2017 11 16.94739601 15 29.52 -17 46 03.7          18.2 GUEW020J95
         K17W00B  C2017 11 17.18387 01 29 19.12 -17 18 07.0          17.8 GUEW020I52
         K17W00B  C2017 11 17.18400 01 29 19.51 -17 18 06.5          18.1 GUEW020I52
         K17W00B  C2017 11 17.18412 01 29 19.92 -17 18 05.3          18.1 GUEW020I52
         K17W00B  C2017 11 17.18425 01 29 20.32 -17 18 04.6          18.0 GUEW020I52
         K17W00B  C2017 11 17.18488 01 29 22.40 -17 18 00.0          17.4 GUEW020I52
         K17W00B  C2017 11 17.18557 01 29 24.62 -17 17 55.1          17.9 GUEW020I52
         K17W00B  C2017 11 17.18627 01 29 26.87 -17 17 50.3          18.1 GUEW020I52
         K17W00B  C2017 11 17.18690 01 29 28.92 -17 17 45.9          18.1 GUEW020I52
         K17W00B  C2017 11 17.32138 01 36 38.49 -17 01 06.3          18.3 RoEW020926
         K17W00B  C2017 11 17.32218 01 36 41.04 -17 01 00.0          18.5 RoEW020926
         K17W00B  C2017 11 17.32296 01 36 43.50 -17 00 54.0          18.3 RoEW020926
         K17W00B  C2017 11 17.32373 01 36 45.99 -17 00 47.6          18.2 RoEW020926
         K17W00B  C2017 11 17.32454 01 36 48.52 -17 00 41.7          18.3 RoEW020926
         K17W00B  C2017 11 17.32535 01 36 51.11 -17 00 35.3          18.3 RoEW020926
    
    Observer details:
    104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri.  Measurers
        P. Bacci, L. Tesi, G. Fagioli.  0.60-m f/4 reflector + CCD.
    474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore,
        P. M. Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
    595 Farra d'Isonzo.  Observers L. Bittesini, F. Bressan, E. Pettarin, F. Piani.
        Measurer E. Pettarin.  0.61-m f/4.0 reflector + CCD.
    703 Catalina Sky Survey.  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.  0.68-m Schmidt + 10K CCD.
    926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
        M. Schwartz.  0.81-m f/7 Ritchey-Chretien + CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observers G. J. Leonard,
        R. G. Matheny.  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.
    J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers
        M. Micheli, D. Koschny, A. Knoefel, E. Schwab, M. Busch.  1.0-m f/4.4
        reflector + CCD.
    J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
        + CCD.
    K51 Osservatorio del Celado, Castello Tesino.  Observer G. Favero.  Measurer
        M. Campestrin.  0.80-m f/4 reflector + CCD.
    
    Orbital elements:
    2017 WB                                                  Earth MOID = 0.0003 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M 339.42823              (2000.0)            P               Q
    n   0.41682629     Peri.  154.60547     +0.91542805     -0.39633052
    a   1.7748677      Node   228.92776     +0.35159159     +0.87222694
    e   0.4598336      Incl.    5.33515     +0.19589495     +0.28660474
    P   2.36           H   25.2           G   0.15           U   5
    Residuals in seconds of arc
    171116 703  0.7+  0.9-    171116 474  0.2-  0.0     171116 J95  0.4-  0.0
    171116 703  0.4-  0.1+    171116 474  0.6-  0.2+    171116 J95  0.1-  0.7-
    171116 703  2.2-  0.2+    171116 474  0.8-  0.5+    171117 I52  0.3+  0.2+
    171116 703  0.8-  0.0     171116 474  0.6-  0.9+    171117 I52  0.2-  0.2-
    171116 703  1.5-  0.1+    171116 474  0.4-  0.3+    171117 I52  0.1+  0.1+
    171116 703  1.5-  0.3-    171116 K51  0.5-  0.3+    171117 I52  0.2-  0.1-
    171116 703  0.1-  0.1-    171116 K51  0.0   0.4-    171117 I52  0.4+  0.1+
    171116 I52  0.8-  0.3-    171116 K51  0.8-  0.5-    171117 I52  0.3+  0.2+
    171116 I52  0.8-  0.2+    171116 104  0.5-  0.0     171117 I52  0.1+  0.1+
    171116 I52  0.7-  0.3-    171116 104  0.3+  0.1-    171117 I52  0.3+  0.1+
    171116 I52  1.1-  0.7-    171116 104  0.1-  0.4-    171117 926  0.3-  0.1+
    171116 I52  0.2-  0.1-    171116 J04  0.2+  0.1+    171117 926  0.2-  0.2+
    171116 I52  0.5-  0.1-    171116 J04  0.1+  0.2+    171117 926  0.4-  0.1+
    171116 I52  0.1+  0.2+    171116 J04  0.2+  0.2-    171117 926  0.3+  0.5+
    171116 474  0.1+  0.6+    171116 595  0.2+  0.2+    171117 926  0.3-  0.1+
    171116 474  0.2-  0.4+    171116 595  0.5+  0.8+    171117 926  0.0   0.2+
    171116 474  0.3-  0.6+    171116 595  1.4+  0.4+
    171116 474  0.8-  0.6+    171116 J95  0.2+  0.1-
    
    Ephemeris:
    2017 WB                  a,e,i = 1.77, 0.46, 5                   q = 0.9587
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 10 18    18 19 23.5 -04 06 23   0.1444  0.9608    71.7   100.1    24.5
    ...
    2017 11 02    18 57 15.1 -06 13 06   0.07239 0.9656    66.4   109.6    23.6
    ...
    2017 11 10    20 07 16.3 -11 14 33   0.03509 0.9813    74.2   103.8    21.7
    ...
    2017 11 16    00 16 11.3 -18 51 27   0.01895 0.9987   120.4    58.6    18.7
    2017 11 17    01 18 37.5 -17 33 36   0.01986 1.0020   131.5    47.7    18.5
    2017 11 18    02 11 24.7 -15 27 38   0.02196 1.0055   140.0    39.2    18.5
    ...
    2017 11 24    04 29 54.0 -06 00 30   0.04612 1.0284   152.4    26.4    19.8
    ...
    2017 12 02    05 12 10.3 -01 44 21   0.08652 1.0646   154.4    23.6    21.1
    ...
    2017 12 17    05 31 31.9 +02 02 47   0.1718  1.1458   158.6    18.2    22.6
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-W20
    

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