Central Bureau for Astronomical Telegrams
IAUC 3947: 1984 KB; LSS 2018
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Read IAUC 3948
Circular No. 3947
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
1984 KB
Carolyn and Eugene Shoemaker report their discovery of a
fast-moving asteroidal object on exposures with the 0.46-m Schmidt
telescope at Palomar as follows:
1984 UT R.A. (1950.0) Decl. Mag.
May 27.449 17 58.3 +15 30 14
27.472 17 57.8 +15 28
29.429 17 39.1 +11 23
29.444 17 38.9 +11 21
PERIODIC COMET CLARK (1983w)
Ephemeris from the orbital elements on MPC 7658:
1984 ET R.A. (1950.0) Decl. p r m1
Apr. 30 19 10.50 -25 44.7 0.877 1.577 11.7
May 10 19 33.39 -27 11.6
20 19 54.50 -28 48.5 0.748 1.554 11.2
30 20 13.06 -30 37.3
June 9 20 28.23 -32 37.7 0.662 1.555 11.0
19 20 39.30 -34 45.3
29 20 45.72 -36 51.6 0.624 1.580 11.0
July 9 20 47.55 -38 43.1
19 20 45.72 -40 04.9 0.642 1.628 11.2
29 20 41.84 -40 46.4
Aug. 8 20 37.99 -40 43.5 0.723 1.695 11.7
18 20 35.93 -40 00.6
28 20 36.58 -38 46.6 0.868 1.778 12.4
LSS 2018
J. S. Drilling, Louisiana State University, reports that this
binary central star in the planetary nebula DS1 (cf. IAUC 3939,
3942) has an ultraviolet continuum that varies in phase with the B
magnitude. Preliminary analysis of 25 low-resolution spectra
obtained with the IUE satellite during May 20.54-21.96 UT indicates
that the amplitude of the nearly sinusoidal brightness variation
is 0.22, 0.45 and 0.52 mag at 134, 272 and 440 nm, respectively.
The period has been revised to 8.571 hr.
1984 May 30 (3947) Brian G. Marsden
Read IAUC 3948
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