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IAUC 4914: 1989r; EXTRAGALACTIC CH3CCH; DX And

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IAUC number 

                                               Circular No. 4914
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


COMET OKAZAKI-LEVY-RUDENKO (1989r)
     New orbital elements on MPC 15520 by S. Nakano, Center for
Astrophysics, yield 1/a = -0.000462 +/- 0.000034 AU**-1.  B. G.
Marsden derives from this an 'original' value of -0.000218 AU**-1
but remarks that allowance for nongravitational forces could make
the orbit elliptical.
     J. Luu, Massachusetts Insititute of Technology; and D. Jewitt,
Institute for Astronomy, University of Hawaii, report the
submillimeter continuum detection of the object during Nov. 18-24 with
the James Clerk Maxwell Telescope on Mauna Kea.  This is apparently
the first dynamically new comet to be detected in the submillimeter
range.  The detected 0.8-mm flux densities (20" diaphragm) varied
with time in the estimated range 40 +/- 8 mJy (Nov. 18.8 UT) to
130 +/- 35 mJy (Nov. 22.8 UT).  The flux densities imply a mass of
the order 10E8 kg contributed by millimeter-sized and larger particles.
     Total visual magnitude estimates (cf. IAUC 4908):  Nov. 21.50
UT, 5.8 (R. A. Keen, Mt. Thorodin, CO, 8x40 binoculars; 1.5-deg
tail in p.a. 310 deg); 22.43, 5.9 (J. E. Bortle, Stormville, NY,
10x50 binoculars; 0.85-deg tail in p.a. 312 deg); 23.25, 5.7 (A.
Pereira, Cabo da Roca, Portugal, 9x34 binoculars); 24.19, 6.2 (P.
Schmeer, Bischmisheim, W. Germany, 20x80 binoculars); 25.54, 5.2
(C. S. Morris, Pine Mountain Club, CA, 20x80 binoculars; 2-deg
tail in p.a. 294 deg); 26.24, 5.7 (J. D. Shanklin, Cambridge,
England, 7x50 binoculars); 27.20, 5.8 (A. Boattini, Florence,
Italy, 10x50 binoculars); 29.48, 6.0 (G. Kronk, Troy, IL, 20x80
binoculars; 40' tail in p.a. 313 deg).


EXTRAGALACTIC CH3CCH
Corrigendum.  On IAUC 4906, title and line 3, for  CH3CCN  read  CH3CCH


DX ANDROMEDAE
     Visual magnitude estimates (cf. IAUC 4908):  Nov. 21.73 UT,
13.3 (P. Schmeer, Bischmisheim, West Germany); 23.05, 13.0 (G.
Dyck, North Dartmouth, MA); 24.09, 12.7 (C. Scovil, Stamford, CT);
25.76, 12.3 (S. Korth, Monheim, W. Germany); 26.98, 11.8 (Scovil);
27.20, 12.2 (J. Griese, Stamford, CT); 28.78, 12.1 (Korth); 29.79,
12.1 (Schmeer).


1989 November 30               (4914)             Daniel W. E. Green

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