Central Bureau for Astronomical Telegrams
IAUC 4619: 1988h; N Oph 1988
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Read IAUC 4620
Circular No. 4619
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 SHOEMAKER-HOLT-RODRIQUEZ (1988h)
The following precise positions have been obtained by J. Gibson
with the 1.5-m reflector (+ CCD) at Palomar:
1988 UT R.A. (1950) Decl. m1
June 25.28883 20 03 19.83 +17 29 51.1 15
25.48706 20 03 08.69 +17 28 48.9
Parabolic orbital elements from observations June 11-25:
T = 1989 June 10.99 ET Peri. = 232.55
Node = 114.69 1950.0
q = 2.4526 AU Incl. = 97.42
1988 ET R.A. (1950) Decl. Delta r m1
June 8 20 16.82 +18 28.8 3.938 4.494 14.5
18 20 09.64 +18 02.1
28 20 00.77 +17 14.8 3.579 4.340 14.1
July 8 19 50.46 +16 03.8
18 19 39.15 +14 27.0 3.318 4.186 13.8
28 19 27.41 +12 24.6
Aug. 7 19 15.90 + 9 59.6 3.187 4.034 13.6
NOVA OPHIUCHI 1988
F. J. Jablonski, S. D. Kirhakos, M. P. Diaz and R. Baptista,
Instituto de Pesquisas Espaciais, Sao Jose dos Campos, report that
spectra (resolution 0.1 nm) obtained with the GEC CCD at the
Laboratorio Nacional de Astrofisica during June 13-16 show Balmer
emission with asymmetric profiles and more symmetric He I and Fe II
emission. Values of the centroid velocity, FWHM, FWZI (all
heliocentric, in km/s and with uncertainties of 20 km/s), equivalent
width (in nm) and ratio of intensities of the blue to the red peak
are: H alpha, -91, 1166, 3247, 279.6, 0.55; H beta, -74, 1049, 3086,
49.4, 0.45; H gamma, -, -, 2005, 10.3, -; He I 587.6 nm, -215, 1073,
3086, 11.5, 1.14; Fe II 492.4 nm, -152, 1097, 2682, 2.6, about 1.1; Fe
II 516.9 nm, -197, 1016, 1278, 1.1, -; Fe II 501.8 nm + He I 501.6 nm
blend, -269, 1077, 3219, 4.4, -. Interstellar absorption features due
to the Na I doublet are blueshifted by 15 +/- 6 km/s and have
equivalent widths of 0.108 and 0.094 nm. UBVRI photometry: June 9.172
UT, V = 10.37, U-B = -0.22, B-V = +0.89, V-R = +1.66, V-I = -0.61;
June 23.069, 10.65, -0.29, +0.97, +1.52, -0.57 (uncertainty 0.1 mag
in U-B, up to 0.04 mag otherwise).
1988 June 27 (4619) Brian G. Marsden
Read IAUC 4620
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