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IAUC 4637: 1988j; P/SCHWASSMANN-WACHMANN 1

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IAUC number 

                                                  Circular No. 4637
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)
     The following precise positions have been reported:

     1988 UT             R.A. (1950) Decl.       Observer
     Aug.  7.46348    4 46 49.38   + 0 33 00.3   Skiff
           7.47803    4 46 54.48   + 0 32 57.6     "
           8.42500    4 52 41.56   + 0 28 51.5   Alu
           8.46253    4 52 54.74   + 0 28 45.7   Skiff
           9.35080    4 58 30.41   + 0 24 48.5   Shao
           9.35829    4 58 33.30   + 0 24 47.0     "

B. Skiff (Lowell Obs., Anderson Mesa Station).  0.33-m Pluto camera.
J. Alu (Palomar).  0.46-m Schmidt telescope.  Measured by B. Roman.
C.-Y. Shao and G. Schwartz (Oak Ridge).  1.55-m reflector.

     Preliminary parabolic orbital elements from 5 observations,
Aug. 7-9:

     T = 1988 Sept. 17.22 ET          Peri. = 349.85
                                      Node  = 167.40    1950.0
     q = 0.1561 AU                    Incl. =  40.63

     1988 ET      R.A. (1950) Decl.     Delta      r       m1
     July 28     3 53.99    + 1 02.0    1.357    1.378    10.1
     Aug.  2     4 16.96    + 0 51.5
           7     4 44.06    + 0 34.9    1.125    1.177     9.0
          12     5 16.25    + 0 11.9
          17     5 54.41    - 0 17.0    0.944    0.959     7.7
          22     6 38.95    - 0 48.5
          27     7 29.10    - 1 16.1    0.859    0.719     6.2
     Sept. 1     8 22.72    - 1 30.3
           6     9 17.13    - 1 19.3    0.919    0.447     4.3


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Magnitude estimates (cf. IAUC 4606):  June 21.44 UT, m1
= 14.6, m2 = 17.1 (J. Gibson, Palomar Obs., 1.5-m reflector + CCD
+ Gunn r filter); July 27.02, m1 about 13: (M. Jaeger, Fischamend,
Austria, photographic, 0.2-m f/1.5 Schmidt camera; diffuse 2' coma with
central condensation).


1988 August 9                  (4637)            Daniel W. E. Green

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