[Iaude] MPEC P41: COMET C/2019 NJ3 (Lemmon)

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Tue Aug 11 15:57:36 EDT 2020


M.P.E.C. 2020-P41                               Issued 2020 August 11, 19:34 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 C/2019 NJ3 (Lemmon)                             

     This object has been found to display cometary features.  Reports are as
follows:

OC   Date        Reporter           Coma    Tail    PA          Exposures

X02  2020-07-30  E. Guido            7"      15"    305          17x60s
Q62  2019-08-01  H. Sato             8"                           2x60s

Observations:
    CK19N03J &C2019 06 05.38366922 20 33.23 -15 38 24.5          21.6 gVEP041W84
    CK19N03J &C2019 06 27.29128522 17 31.67 -18 28 05.7          21.5 gVEP041W84
    CK19N03J  C2019 07 02.55322522 15 54.228-19 16 38.75         20.73GVEP041F51
    CK19N03J  C2019 07 02.56438522 15 53.976-19 16 44.81         20.71GVEP041F51
    CK19N03J  C2019 07 02.57568622 15 53.703-19 16 51.13         20.87GVEP041F51
    CK19N03J  C2019 07 02.58681922 15 53.477-19 16 57.53         20.60GVEP041F51
    CK19N03J &C2019 08 08.20813721 55 07.79 -25 51 20.1          20.3 iVEP041W84
    CK19N03J  C2019 10 17.21265921 07 04.654-35 31 29.04         20.76GVEP041F52
    CK19N03J  C2019 10 17.22292221 07 04.427-35 31 31.46         20.52GVEP041F52
    CK19N03J  C2019 10 17.23857821 07 04.153-35 31 35.22         20.32GVEP041F52
    CK19N03J  C2019 10 17.24892221 07 03.921-35 31 38.50         20.67GVEP041F52
    CK19N03J  C2020 07 25.27156 00 52 33.16 -71 38 56.1          18.0 VqEP041X74
    CK19N03J  C2020 07 25.27966 00 52 33.44 -71 39 05.1                qEP041X74
    CK19N03J  C2020 07 25.29933 00 52 34.21 -71 39 30.0          18.4 VqEP041X74
    CK19N03J  C2020 07 25.30793 00 52 34.67 -71 39 41.6          18.1 VqEP041X74
    CK19N03J KC2020 07 30.25430 00 55 59.20 -73 21 09.1          18.8 GVEP041X02
    CK19N03J KC2020 07 30.26445 00 55 59.56 -73 21 21.6          19.0 GVEP041X02
    CK19N03J 1C2020 08 01.79079 00 57 29.77 -74 12 23.2                VEP041Q62
    CK19N03J 1C2020 08 01.79168 00 57 29.80 -74 12 24.0          18.0 GVEP041Q62
    CK19N03J KC2020 08 07.32791 01 00 08.18 -76 01 46.6          18.1 GVEP041W95
    CK19N03J KC2020 08 07.34288 01 00 08.42 -76 02 04.3          18.0 GVEP041W95
    CK19N03J KC2020 08 07.35822 01 00 08.63 -76 02 22.0          18.2 GVEP041W95

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
    Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, K. Chambers, T. Dukes, T.
    Lowe, A. Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y.
    Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
W84 Cerro Tololo-DECam.  Observer .  Measurer S. Deen.  4.0-m reflector + CCD.
W95 Observatorio Panameno, San Pedro de Atacama.  Observer A. Maury.  0.4-m
    Newtonian reflector + CCD.
X02 Telescope Live, El Sauce.  Observers E. Guido, M. Rocchetto, E. Bryssinck,
    M. Fulle, G. Milani, C. Nassef, G. Savini, A. Valvasori.  Measurer E.
    Guido.  0.6-m f/6.5 astrograph + CCD.
X74 Observatorio Campo dos Amarais.  Observer M. Forslund.  Measurer S. Deen.
    0.3-m f/4 reflector + CCD.

Orbital elements:
    C/2019 NJ3 (Lemmon)                                                         
Epoch 2020 Nov. 7.0 TT = JDT 2459160.5                                          
T 2020 Oct. 22.28282 TT                                 Rudenko                 
q   4.3616695            (2000.0)            P               Q                  
z  -0.0001851      Peri.  246.84130     +0.21994173     -0.76828950             
 +/-0.0000033      Node   142.45533     +0.03120855     +0.62144526             
e   1.0008075      Incl.   99.43871     -0.97501367     -0.15341786             
>From 39 observations 2019 June 5-2020 Aug. 7, mean residual 0".4.               
                                                                                
    C/2019 NJ3 (Lemmon)                                                         
Epoch 2020 May 31.0 TT = JDT 2459000.5                                          
T 2020 Oct. 22.15886 TT                                 Rudenko                 
q   4.3618047            (2000.0)            P               Q                  
z  -0.0002042      Peri.  246.82204     +0.22020051     -0.76819206             
 +/-0.0000033      Node   142.45333     +0.03100960     +0.62148772             
e   1.0008907      Incl.   99.43735     -0.97496161     -0.15373344             
>From 39 observations 2019 June 5-2020 Aug. 7, mean residual 0".4.               
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2020 07 12    00 41 20.3 -67 01 18   3.9234  4.4421   114.5    12.0  18.4
...
2020 07 27    00 53 48.0 -72 14 34   3.8911  4.4204   115.2    12.0  18.4
...
2020 08 04    00 58 40.2 -74 56 25   3.8971  4.4102   114.1    12.1  18.4
...
2020 08 10    01 00 59.8 -76 53 06   3.9115  4.4032   112.7    12.3  18.4
2020 08 11    01 01 14.2 -77 12 04   3.9146  4.4021   112.4    12.3  18.4
2020 08 12    01 01 25.8 -77 30 53   3.9180  4.4010   112.1    12.3  18.4
...
2020 08 18    01 01 21.8 -79 20 12   3.9426  4.3947   110.1    12.5  18.4
...
2020 08 26    00 56 43.6 -81 34 57   3.9857  4.3871   106.9    12.7  18.4
...
2020 09 10    00 19 38.0 -85 03 11   4.0919  4.3756    99.7    13.1  18.5

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-P41




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