• MPC Preparation (Info)

  • MPEC 2019-L42 : COMET P/2007 R1 = 2019 K3 (Larson)

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    M.P.E.C. 2019-L42                                Issued 2019 June 3, 21:50 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
    
                          COMET P/2007 R1 = 2019 K3 (Larson)
    
          This comet has been recovered by the undersigned in incidental astrometry
    from 2019 May 31 reported by the Pan-STARRS 1 project, and by E. Schwab in
    images taken as Calar Alto (Z84).  Schwab reported no coma and no tail in
    stacked images with a total exposure time of 600s.  The indicated delta-T
    correction to the prediction on MPC 75514, by the undersigned, is -0.08 days.
    
    Observations:
        PK19K030 KC2019 05 29.08794 16 42 15.85 -13 26 23.9          21.9 GVEL042Z84
        PK19K030 KC2019 05 29.10684 16 42 15.21 -13 26 22.0          21.7 GVEL042Z84
        PK19K030 KC2019 05 29.11628 16 42 14.94 -13 26 22.4          22.1 GVEL042Z84
        PK19K030* C2019 05 31.45154 16 41 08.967-13 23 24.69         22.0 wUEL042F51
        PK19K030  C2019 05 31.46447 16 41 08.599-13 23 23.49         22.0 wUEL042F51
        PK19K030  C2019 05 31.49031 16 41 07.861-13 23 21.64         21.9 wUEL042F51
        PK19K030 KC2019 06 03.00463 16 39 56.43 -13 20 20.5          22.1 GVEL042Z84
        PK19K030 KC2019 06 03.01404 16 39 56.12 -13 20 19.1          21.6 GVEL042Z84
        PK19K030 KC2019 06 03.02346 16 39 55.88 -13 20 18.5          21.3 GVEL042Z84
        PK19K030 KC2019 06 03.03287 16 39 55.56 -13 20 17.7          22.1 GVEL042Z84
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
        M. Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau,
        J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier,
        Y. Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    Z84 Calar Alto-Schmidt.  Observer E. Schwab.  Measurers E. Schwab, D. Koschny,
        M. Micheli.  0.8-m f/3 Schmidt + CCD.
    
    Orbital elements:
        P/2007 R1 (Larson)
    Epoch 2007 Aug. 8.0 TT = JDT 2454320.5
    T 2007 Aug. 22.97599 TT                                 MPCW
    q   4.3518440            (2000.0)            P               Q
    n   0.06667844     Peri.  175.04601     +0.99832956     +0.05763877
    a   6.0229940      Node   181.66538     -0.05659246     +0.96166377
    e   0.2774617      Incl.    7.87763     -0.01163560     +0.26810553
    P  14.78
    From 226 observations 2007 Sept. 4-2019 June 3, mean residual 0".6.
    
        P/2007 R1 (Larson)
    Epoch 2022 Mar. 2.0 TT = JDT 2459640.5
    T 2022 Feb. 17.41718 TT                                 MPCW
    q   4.4197574            (2000.0)            P               Q
    n   0.05987738     Peri.  170.98593     +0.96486037     +0.26229019
    a   6.4708426      Node   173.74093     -0.24919151     +0.93240310
    e   0.3169734      Incl.    8.31059     -0.08335502     +0.24865298
    P  16.46
    From 226 observations 2007 Sept. 4-2019 June 3, mean residual 0".6.
    
        P/2007 R1 (Larson)
    Epoch 2036 Jan. 28.0 TT = JDT 2464720.5
    T 2036 Jan. 23.43629 TT                                 MPCW
    q   4.3768235            (2000.0)            P               Q
    n   0.06906500     Peri.  163.14965     +0.88504667     +0.46468169
    a   5.8834314      Node   169.03572     -0.44208856     +0.85763530
    e   0.2560764      Incl.    8.35246     -0.14577415     +0.22030119
    P  14.27
    From 226 observations 2007 Sept. 4-2019 June 3, mean residual 0".6.
    
        P/2007 R1 (Larson)
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
    T 2022 May 14.15173 TT                                  MPCW
    q   4.3268126            (2000.0)            P               Q
    n   0.06549027     Peri.  174.88753     +0.99588309     +0.09064672
    a   6.0956246      Node   179.91085     -0.08719296     +0.95856261
    e   0.2901773      Incl.    7.70299     -0.02478425     +0.27007572
    P  15.05
    From 226 observations 2007 Sept. 4-2019 June 3, mean residual 0".6.
    
    Ephemeris:
        P/2007 R1 (Larson)
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
    2019 05 04    16 52 46.5 -14 04 09   5.1848  6.0668   148.4     5.0  21.9
    ...
    2019 05 19    16 46 51.8 -13 40 29   5.0611  6.0363   163.1     2.8  21.8
    ...
    2019 05 27    16 43 14.4 -13 29 09   5.0210  6.0199   169.5     1.8  21.8
    ...
    2019 06 02    16 40 25.0 -13 21 30   5.0033  6.0076   171.2     1.5  21.8
    2019 06 03    16 39 56.6 -13 20 19   5.0014  6.0055   171.1     1.5  21.8
    2019 06 04    16 39 28.1 -13 19 09   4.9998  6.0035   170.9     1.5  21.8
    ...
    2019 06 10    16 36 38.3 -13 12 47   4.9964  5.9912   167.4     2.1  21.8
    ...
    2019 06 18    16 32 59.2 -13 06 02   5.0081  5.9747   160.4     3.3  21.8
    ...
    2019 07 03    16 26 57.9 -12 59 29   5.0770  5.9436   145.6     5.5  21.8
    
    Gareth V. Williams           (C) Copyright 2019 MPC           M.P.E.C. 2019-L42
    

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