• Processing (Info)

    • MPEC 2022-T74 : COMET P/2020 S6 = P/1987 A2 = P/2013 Y3 (Leonard)

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    M.P.E.C. 2022-T74                               Issued 2022 October 5, 05:17 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/2020 S6 = P/1987 A2 = P/2013 Y3 (Leonard)            

     M. Meyer has identified observations of X/1987 A2 with P/2020 S6 (Leonard).
S. Deen was able to locate additional observations taken in 2013/2014.

Observations:
    PJ87A020* A1987 01 05.66764 09 42 17.34 -08 43 16.7          17.5T  ET074260
    PJ87A020  A1987 01 05.73361 09 42 15.35 -08 43 36.9                 ET074260
    PK13Y030* C2013 12 29.30479501 16 34.40 +12 19 27.5          22.2 R ET074568
    PK13Y030  C2013 12 29.30927601 16 34.75 +12 19 27.0                 ET074568
    PK13Y030  C2014 01 03.24625501 24 19.08 +12 07 06.4          22.5 R ET074568
    PK13Y030  C2014 01 03.30818301 24 24.88 +12 07 00.2          22.7 R ET074568

Observer details:
260 Siding Spring Observatory-DSS.  Measurer M. Meyer.  Siding Spring. 1.2-m
    U.K. Schmidt.
568 Maunakea.  Measurer S. Deen.  3.58-m Canada-France-Hawaii Telescope + CCD.

Orbital elements:
    P/2020 S6 (Leonard)                                                         
Epoch 2022 Aug. 9.0 TT = JDT 2459800.5                                          
T 2020 Nov. 23.75400 TT                                 Rudenko                 
q   1.8739193            (2000.0)            P               Q                  
n   0.14430998     Peri.  176.67489     +0.50993306     -0.82704962             
a   3.5997455      Node   242.54160     +0.78295293     +0.56014207             
e   0.4794301      Incl.   15.46113     +0.35630462     -0.04722062             
P   6.83                                                                        
From 286 observations 1987 Jan. 5-2021 Feb. 13, mean residual 0".6.             
     Nongravitational parameters A1 = -0.04, A2 = -0.0562.                      
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2022 09 05    12 37 43.8 -13 35 06   5.2237  4.4119    33.0     7.1  26.0
...
2022 09 20    12 51 50.7 -14 39 51   5.3698  4.4582    22.5     4.9  26.1
...
2022 09 28    12 59 30.1 -15 16 28   5.4305  4.4823    17.1     3.8  26.2
...
2022 10 04    13 05 16.5 -15 44 36   5.4677  4.5002    13.4     2.9  26.2
2022 10 05    13 06 14.3 -15 49 19   5.4732  4.5032    12.8     2.8  26.2
2022 10 06    13 07 12.1 -15 54 04   5.4785  4.5062    12.2     2.7  26.2
...
2022 10 12    13 12 58.8 -16 22 40   5.5060  4.5238     9.3     2.0  26.3
...
2022 10 20    13 20 40.0 -17 01 07   5.5312  4.5470     8.0     1.7  26.3
...
2022 11 04    13 34 53.7 -18 13 12   5.5418  4.5895    14.8     3.2  26.3

M. P. C. Staff               (C) Copyright 2022 MPC           M.P.E.C. 2022-T74

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