Central Bureau for Astronomical Telegrams
IAUC 5049: zeta Oph; 1990b; 1990 KA
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Read IAUC 5050
Circular No. 5049
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
zeta OPHIUCHI
N. V. Leister and E. Janot-Pacheco, Instituto Astronomico e
Geofisico, Universidade de Sao Paulo, report: "Spectroscopic
observations of the Be star zeta Oph on June 9 and 10 in the
Laboratorio Nacional de Astrofisica's 1.60-m reflector (coude focus +
CCD) reveal no more sign of the emission in H alpha and He I 667.8 nm
detected by Kambe et al. on May 9 and 15 (cf. IAUC 5015). Spectra
taken at approximately 10-min intervals show the well-known moving
bumps in the He I line of this star. The absence of emission suggests
that this rapid variability is due to the central star."
COMET CERNIS-KIUCHI-NAKAMURA (1990b)
Ephemeris extension from the orbital elements on MPC 16551:
1990 ET R.A. (1950) Decl. Delta r m1
June 18 9 31.46 +14 39.7 2.193 1.804 13.3
28 9 50.66 +10 24.8
July 8 10 08.02 + 6 36.6 2.595 2.038 14.2
18 10 24.03 + 3 09.7
28 10 39.01 - 0 00.3 2.987 2.273 14.9
Total visual magnitude estimates: Apr. 29.89 UT, 10.2 (S. Korth,
Dusseldorf, W. Germany, 0.36-m reflector); May 14.19, 12.2 (C. S.
Morris, Pine Mountain Club, CA, 0.26-m reflector); 14.21, 13.8 (D. H.
Levy, Catalina Mountains, AZ, 1.5-m reflector);
1990 KA
Ephemeris extension from the orbital elements on MPC 16588:
1990 ET R.A. (1950) Decl. Delta r V
July 8 16 15.05 -16 14.3 0.324 1.280 15.3
13 16 26.64 -18 55.9
18 16 38.80 -21 21.1 0.366 1.306 15.6
23 16 51.45 -23 28.8
28 17 04.48 -25 18.7 0.420 1.339 16.0
Aug. 2 17 17.79 -26 51.0
7 17 31.25 -28 06.7 0.486 1.377 16.4
12 17 44.75 -29 07.0
17 17 58.24 -29 53.2 0.564 1.419 16.8
1990 July 5 (5049) Brian G. Marsden
Read IAUC 5050
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