• MPC Preparation (Info)

    • MPEC 2018-N18 : COMET C/2018 N1 (NEOWISE)

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    M.P.E.C. 2018-N18                                Issued 2018 July 6, 00:54 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 C/2018 N1 (NEOWISE)

     J. R. Masiero (C51) reported that the discovery images of this object
showed "significant cometary activity".  D. T. Durig (850, July 5) noted that
the object was diffuse in individual exposures, with an 18" coma visible in
90 stacked 10s images, along with a possible faint 30" outer coma and an
asymmetric extension to the west.  L. S. Amaral (X74, July 5) reported a 15"
coma in three stacked 60s exposures.

Observations:
    CK18N010  C2018 06 29.58588 01 13 17.93 -08 53 05.6          16.1 oUEN018T05
    CK18N010  C2018 06 29.59381 01 13 17.22 -08 53 13.7          16.3 oUEN018T05
    CK18N010  C2018 06 29.60210 01 13 16.51 -08 53 22.2          17.2 oUEN018T05
    CK18N010  C2018 06 29.61036 01 13 15.78 -08 53 31.2          16.3 oUEN018T05
    CK18N010* S2018 07 02.37056 01 08 46.76 -09 46 43.7          16   RLEN018C51
    CK18N010  s2018 07 02.37056 1 + 5602.6905 + 3958.9495 -  105.2809   EN018C51
    CK18N010  S2018 07 02.50146 01 08 32.22 -09 49 33.1                LEN018C51
    CK18N010  s2018 07 02.50146 1 + 5594.6191 + 3969.9915 -  120.2812   EN018C51
    CK18N010  S2018 07 02.63224 01 08 17.56 -09 52 24.8                LEN018C51
    CK18N010  s2018 07 02.63224 1 + 5581.0939 + 3990.3175 -   52.0935   EN018C51
    CK18N010  S2018 07 02.69769 01 08 10.15 -09 53 51.1                LEN018C51
    CK18N010  s2018 07 02.69769 1 + 5577.0816 + 3995.8597 -   59.5692   EN018C51
    CK18N010  S2018 07 02.76314 01 08 02.63 -09 55 17.7                LEN018C51
    CK18N010  s2018 07 02.76314 1 + 5573.0562 + 4001.3819 -   67.1121   EN018C51
    CK18N010  C2018 07 05.30677 01 02 34.36 -10 57 56.0          15.0 RqEN018X74
    CK18N010  C2018 07 05.31505 01 02 33.10 -10 58 10.2          15.0 RqEN018X74
    CK18N010  C2018 07 05.32353 01 02 31.77 -10 58 24.1          15.0 RqEN018X74
    CK18N010 KC2018 07 05.38251 01 02 23.27 -11 00 09.7          16.1 RuEN018850
    CK18N010 KC2018 07 05.38967 01 02 22.22 -11 00 22.3          16.1 RuEN018850
    CK18N010 KC2018 07 05.39690 01 02 21.09 -11 00 33.3          15.8 RuEN018850
    CK18N010  C2018 07 05.90236 01 01 04.90 -11 14 46.3          16.6 RcEN018N55
    CK18N010  C2018 07 05.91086 01 01 03.58 -11 15 02.3          16.6 RcEN018N55
    CK18N010  C2018 07 05.91913 01 01 02.26 -11 15 16.3          16.6 RcEN018N55
    CK18N010  C2018 07 05.92741 01 01 01.01 -11 15 29.9          16.6 RcEN018N55

Observer details:
850 Cordell-Lorenz Observatory, Sewanee.  Observer D. T. Durig.  0.3-m f/9.4
    Schmidt-Cassegrain + CCD.
C51 WISE.  Measurers A. K. Mainzer, J. M. Bauer, T. Grav, J. R. Masiero,
    J. W. Dailey, R. M. Cutri, E. L. Wright, S. Sonnett, E. Kramer.
N55 Corona Borealis Observatory, Ngari.  Observers P. Sun, T. Chen.  Measurer
    P. Sun.  0.3-m f/7.2 reflector + CCD.
T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, H. Flewelling, A. Heinze,
    H. Weiland, J. Tonry.  Measurers L. Denneau, H. Flewelling, A. Heinze,
    J. Tonry, A. Fitzsimmons, D. Young.  0.5-m f/2.0 Schmidt + CCD.
X74 Observatorio Campo dos Amarais.  Observer L. S. Amaral.  0.31-m f/2.9
    Newtonian reflector + CCD.

Orbital elements:
    C/2018 N1 (NEOWISE)
T 2018 Aug. 1.97976 TT                                  MPCW
q   1.3079121            (2000.0)            P               Q
                   Peri.  354.52019     +0.46246244     -0.82516473
                   Node   292.42971     -0.79956309     -0.54624788
e   1.0            Incl.  159.45495     -0.38318059     +0.14393200
From 19 observations 2018 June 29-July 5.

Ephemeris:
    C/2018 N1 (NEOWISE)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 06 06    01 26 56.3 -05 38 48   1.8316  1.5564    58.1    33.6  18.7
...
2018 06 21    01 21 51.4 -07 03 10   1.3573  1.4499    73.7    42.3  17.8
...
2018 06 29    01 14 06.3 -08 43 07   1.0881  1.4031    83.6    46.0  17.2
...
2018 07 05    01 03 18.2 -10 49 39   0.8828  1.3734    92.3    47.7  16.6
2018 07 06    01 00 49.5 -11 17 29   0.8487  1.3690    94.0    47.8  16.5
2018 07 07    00 58 05.1 -11 47 49   0.8146  1.3647    95.7    47.8  16.4
...
2018 07 13    00 33 36.6 -16 02 22   0.6140  1.3419   108.2    46.0  15.7
...
2018 07 21    23 10 02.1 -27 20 24   0.3833  1.3203   136.4    32.1  14.6
...
2018 08 05    16 45 57.0 -25 03 45   0.4560  1.3087   120.9    41.7  15.0

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-N18

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