Central Bureau for Astronomical Telegrams
IAUC 4094: 1985 PA; 1982i
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Circular No. 4094
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
1985 PA
Ephemeris from the orbital elements on IAUC 4093:
1985 ET R.A. (1950.0) Decl. p r Mag.
Aug. 13 22 37.76 - 6 41.2 0.835 1.823 16.7
18 22 28.46 -12 39.1
23 22 17.47 -19 09.0 0.764 1.771 16.2
28 22 04.85 -25 52.2
Sept. 2 21 50.83 -32 25.8 0.760 1.721 16.4
7 21 35.77 -38 29.0
12 21 20.17 -43 47.6 0.817 1.673 16.8
17 21 04.66 -48 16.2
22 20 49.90 -51 56.7 0.916 1.628 17.1
27 20 36.44 -54 55.1
Oct. 2 20 24.69 -57 19.0 1.037 1.585 17.5
PERIODIC COMET HALLEY (1982i)
J. V. Wall and R. Argyle, Royal Greenwich Observatory, report
that short-exposure CCD observations at the prime focus of the
Isaac Newton 2.5-m reflector at Roque de los Muchachos on July
29.24 UT gave V = 16.2 in an aperture of 8", although some low-
surface-brightness luminosity may have been lost due to the bright
sky. There was a possible extension of the image to the southwest.
H. Hammel and D. P. Cruikshank report that inspection of CCD
images obtained with the Mauna Kea 2.24-m telescope on Aug. 5.6 UT
reveals a suspected narrow jet at position angle 220-230. The
slightly curved feature is approximately 6" long and is not
precisely radial to the nuclear condensation. Three different
exposures (2-5 min each) through a 702-nm filter show the feature over
a 20-min interval. Seeing determined from stellar images was 1"0.
Total visual magnitude estimates: July 27.48 UT, 15.0: (C. S.
Morris and S. Edberg, Table Mountain Observatory, 0.61-m f/16
Cassegrain reflector, 390 x; coma diameter 10", very diffuse); 28.12,
14.0: (M. Verdenet, Bourbon-Lancy, France, 0.35-m reflector);
28.48, 15.0: (Edberg and Morris); 30.11, 14.0: (Verdenet); Aug.
10.48, 14.5 (Morris, Edberg and A. Hale; coma diameter 18");
11.48, 14.5 (Morris); 12.48, 14.3 (Morris and Hale); 17.34, 14.1
(J. Bortle, Springfield, VT, 0.61-m reflector); 18.48, 13.9: (A.
Hale, Dawson Saddle, CA, 0.20-m reflector); 19.49, 13.9 (Hale).
1985 August 20 (4094) Brian G. Marsden
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