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IAUC 4644: 1988j

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IAUC number 

                                                  Circular No. 4644
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


COMET MACHHOLZ (1988j)
     Total visual magnitude estimates: Aug. 8.71 UT, 8.9 (R. H. McNaught,
Siding Spring Observatory, 9 x 63 binoculars); 9.35, 9.2 (J. E.
Bortle, Stormville, NY, 0.32-m reflector); 9.79, 8.1 (T. Lovejoy,
Shiler Park, Queensland, 15 x 80 binoculars; 0.3-deg tail); 10.49, 8.6
(D. E. Machholz, Loma Prieta, CA, 0.25-m reflector); 12.44, 8.4 (C. S.
Morris, Lockwood Valley, CA, 20 x 80 binoculars); 13.45, 8.6 (A. Hale,
Las Cruces, NM, 10 x 50 binoculars); 14.11, 8.4 (A. Boattini,
Montecarmo, Italy, 0.33-m reflector); 15.12, 8.3 (J. da S. Campos,
Durban, South Africa, 0.13-m refractor).

     The following ephemeris is from the orbital elements on IAUC 4643.
The comet will be less than 15 deg from the sun during Sept. 12-24.

     1988 ET      R.A. (1950) Decl.     Delta      r       m1
     Aug. 19     6 11.20    - 0 29.4    0.922    0.916     7.4
          21     6 29.14    - 0 42.0
          23     6 48.02    - 0 54.4    0.883    0.822     6.9
          25     7 07.74    - 1 05.9
          27     7 28.16    - 1 16.0    0.864    0.724     6.3
          29     7 49.13    - 1 24.0
          31     8 10.47    - 1 29.2    0.868    0.621     5.6
     Sept. 2     8 31.99    - 1 31.0
           4     8 53.56    - 1 28.5    0.898    0.512     4.9
           6     9 15.06    - 1 21.0
           8     9 36.50    - 1 07.6    0.954    0.397     3.9
          10     9 57.99    - 0 46.9
          12    10 19.88    - 0 17.3    1.037    0.278     2.5

          24    12 52.41    + 4 21.5    1.170    0.302     3.1
          26    13 14.61    + 4 31.0
          28    13 35.58    + 4 31.5    1.164    0.421     4.6
          30    13 55.51    + 4 25.2
     Oct.  2    14 14.50    + 4 13.8    1.176    0.535     5.6
           4    14 32.58    + 3 58.5
           6    14 49.80    + 3 40.4    1.206    0.642     6.5
           8    15 06.15    + 3 20.5
          10    15 21.68    + 2 59.3    1.250    0.744     7.2
          12    15 36.39    + 2 37.5
          14    15 50.32    + 2 15.6    1.308    0.841     7.8


1988 August 19                 (4644)              Brian G. Marsden

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