[Iaude] MPEC N01: COMET P/2020 M2 = P/2012 SB6 (Lemmon)

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Tue Jun 30 20:53:53 EDT 2020


M.P.E.C. 2020-N01                                  Issued 2020 July 1, 00:11 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

                     COMET P/2020 M2 = P/2012 SB6 (Lemmon)                      

     H. Sato, Tokyo, Japan reports he recovery of comet P/2012 SB6 (Lemmon) on
exposures taken on June 29 UT from iTelescope Observatory, Siding Spring (Q62)
and June 30 UT from iTelescope Observatory, Mayhill (H06).  He notes a strongly
condensed 12" coma and a hint of a 10" fan-like westward tail.

Observations:
    PK20M020*1C2020 06 29.82484 02 52 33.97 +19 24 15.6                VEN001Q62
    PK20M020 1C2020 06 29.82758 02 52 34.24 +19 24 17.9          17.8 TVEN001Q62
    PK20M020 |C2020 06 30.43562 02 53 41.89 +19 31 19.6                VEN001H06
    PK20M020 |C2020 06 30.43954 02 53 42.33 +19 31 22.2                VEN001H06
    PK20M020 |C2020 06 30.44347 02 53 42.74 +19 31 25.1          17.6 TVEN001H06

Observer details:
H06 iTelescope Observatory, Mayhill.  Observer H. Sato.  0.43-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.

Orbital elements:
    P/2020 M2                                                                   
Epoch 2012 Nov. 9.0 TT = JDT 2456240.5                                          
T 2012 Oct. 31.97307 TT                                 Rudenko                 
q   2.4064482            (2000.0)            P               Q                  
n   0.12745359     Peri.   12.78702     +0.92559062     -0.37720050             
a   3.9105214      Node     9.55718     +0.32834362     +0.75846559             
e   0.3846222      Incl.   10.98970     +0.18834136     +0.53146001             
P   7.73                                                                        
>From 182 observations 2012 Sept. 14-2020 June 30, mean residual 0".5.           
                                                                                
    P/2020 M2                                                                   
Epoch 2020 May 31.0 TT = JDT 2459000.5                                          
T 2020 June 19.24735 TT                                 Rudenko                 
q   2.2768753            (2000.0)            P               Q                  
n   0.13174734     Peri.   14.38773     +0.92385967     -0.38177228             
a   3.8250884      Node     8.21140     +0.32973961     +0.75803134             
e   0.4047522      Incl.   10.92892     +0.19430673     +0.52880849             
P   7.48                                                                        
>From 182 observations 2012 Sept. 14-2020 June 30, mean residual 0".5.           
                                                                                
    P/2020 M2                                                                   
Epoch 2027 Dec. 21.0 TT = JDT 2461760.5                                         
T 2027 Dec. 21.34816 TT                                 Rudenko                 
q   2.2844444            (2000.0)            P               Q                  
n   0.13132847     Peri.   14.57971     +0.92304201     -0.38376311             
a   3.8332174      Node     8.14125     +0.33126994     +0.75746540             
e   0.4040400      Incl.   10.91719     +0.19558547     +0.52817804             
P   7.50                                                                        
>From 182 observations 2012 Sept. 14-2020 June 30, mean residual 0".5.           
                                                                                
    P/2020 M2                                                                   
Epoch 2020 May 31.0 TT = JDT 2459000.5                                          
T 2020 June 19.24735 TT                                 Rudenko                 
q   2.2768753            (2000.0)            P               Q                  
n   0.13174734     Peri.   14.38773     +0.92385967     -0.38177228             
a   3.8250884      Node     8.21140     +0.32973961     +0.75803134             
e   0.4047522      Incl.   10.92892     +0.19430673     +0.52880849             
P   7.48                                                                        
>From 182 observations 2012 Sept. 14-2020 June 30, mean residual 0".5.           
                                                                                
    P/2020 M2                                                                   
Epoch 2012 Nov. 9.0 TT = JDT 2456240.5                                          
T 2012 Oct. 31.97307 TT                                 Rudenko                 
q   2.4064482            (2000.0)            P               Q                  
n   0.12745359     Peri.   12.78702     +0.92559062     -0.37720050             
a   3.9105214      Node     9.55718     +0.32834362     +0.75846559             
e   0.3846222      Incl.   10.98970     +0.18834136     +0.53146001             
P   7.73                                                                        
>From 182 observations 2012 Sept. 14-2020 June 30, mean residual 0".5.           
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2020 06 01    01 58 44.8 +13 22 35   2.9864  2.2807    38.4    16.0  18.0
...
2020 06 16    02 26 48.5 +16 36 43   2.8738  2.2770    45.3    18.5  17.9
...
2020 06 24    02 41 44.4 +18 15 05   2.8097  2.2771    49.1    19.7  17.8
...
2020 06 30    02 52 53.2 +19 26 16   2.7600  2.2782    51.9    20.6  17.8
2020 07 01    02 54 44.3 +19 37 54   2.7516  2.2785    52.4    20.7  17.8
2020 07 02    02 56 35.3 +19 49 28   2.7431  2.2787    52.9    20.8  17.8
...
2020 07 08    03 07 38.7 +20 57 32   2.6917  2.2809    55.8    21.6  17.7
...
2020 07 16    03 22 14.0 +22 24 35   2.6211  2.2851    59.8    22.6  17.7
...
2020 07 31    03 48 50.4 +24 56 21   2.4834  2.2968    67.6    24.1  17.6

                      (Last issue was M.P.E.C. 2020-M141)                       

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-N01




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