[Iaude] MPEC B21: COMET C/2017 A3 (ELENIN)

[mpec at si.edu]

M.P.E.C. 2017-B21                                Issued 2017 Jan. 18, 18:25 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 http://www.minorplanetcenter.net/    ISSN 1523-6714


                           COMET C/2017 A3 (ELENIN)
 
Observations:
    CK17A030 |C2017 01 13.45515 06 37 55.69 -49 12 07.5          18.2 NrEB021Q62
    CK17A030 |C2017 01 13.46506 06 37 54.65 -49 11 57.7          18.2 NrEB021Q62
    CK17A030 |C2017 01 13.47497 06 37 53.59 -49 11 48.1          18.3 NrEB021Q62
    CK17A030  C2017 01 15.44955 06 34 24.10 -48 39 07.2          18.0 TqEB021Q60
    CK17A030  C2017 01 15.45597 06 34 23.32 -48 39 00.6          18.0 TqEB021Q60
    CK17A030  C2017 01 15.46240 06 34 22.66 -48 38 52.8          17.9 TqEB021Q60
    CK17A030 3C2017 01 17.11310 06 31 32.08 -48 10 24.4          18.1 NqEB021W88
    CK17A030 3C2017 01 17.17042 06 31 26.11 -48 09 23.5          18.4 NqEB021W88
 
Observer details:
Q60 ISON-SSO Observatory, Siding Spring.  Observer L. Elenin.  0.4-m f/2.4
    reflector + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observers S. Foglia, L. Buzzi,
    P. Concari, C. Cremaschini, G. Galli, M. Tombelli.  0.15-m f/7 refractor
    + CCD.
W88 Slooh.com Chile Observatory, La Dehesa.  Observer B. Lutkenhoner.  0.35-m
    f/11 Schmidt-Cassegrain + CCD.
 
Orbital elements:
    C/2017 A3 (Elenin)
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5
T 2017 Jan. 31.34400 TT                                 MPCW
q   3.8595088            (2000.0)            P               Q
z  +0.0199344      Peri.  304.20992     -0.19830118     -0.02924292
                   Node    97.79757     +0.82101897     +0.54100245
e   0.9230629      Incl.   98.56479     -0.53535456     +0.84051246
>From 92 observations 2017 Jan. 5-17, mean residual 0".5.

Ephemeris:
    C/2017 A3 (Elenin)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2016 12 19    07 27 48.8 -53 42 48   3.5841  3.8767    99.9    14.5  18.2
...
2017 01 03    06 57 47.1 -51 37 47   3.4858  3.8669   105.5    14.2  18.1
...
2017 01 11    06 42 24.1 -49 50 31   3.4512  3.8633   107.6    14.0  18.1
...
2017 01 17    06 31 43.7 -48 12 23   3.4348  3.8614   108.5    14.0  18.0
2017 01 18    06 30 02.4 -47 54 40   3.4330  3.8611   108.6    14.0  18.0
2017 01 19    06 28 22.7 -47 36 34   3.4314  3.8609   108.7    14.0  18.0
...
2017 01 25    06 19 02.8 -45 40 34   3.4272  3.8599   108.9    14.0  18.0
...
2017 02 02    06 08 25.3 -42 49 00   3.4366  3.8595   108.2    14.0  18.0
...
2017 02 17    05 54 17.4 -36 53 35   3.5009  3.8620   104.1    14.4  18.1

Gareth V. Williams           (C) Copyright 2017 MPC           M.P.E.C. 2017-B21