Central Bureau for Astronomical Telegrams
IAUC 2854: 1975j; R CrB; 3U 0352+30; N Mon 1975; 1973 EC
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 2855
Circular No. 2854
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
COMET MORI-SATO-FUJIKAWA (1975j)
Further precise positions have been reported as follows:
1975 UT R. A. (1950) Decl. Observer
Oct. 8.80104 8 23 23.88 + 1 21 07.5 Suzuki
8.80590 8 23 24.01 + 1 20 56.9 "
9.78264 8 24 08.49 + 0 43 28.7 Urata
9.78611 8 24 08.59 + 0 43 22.3 "
9.81632 8 24 10.00 + 0 42 11.2 Suzuki
11.65093 8 25 31.72 - 0 30 03.4 Gilmore
11.66097 8 25 32.15 - 0 30 28.0 "
K. Suzuki (JCPM Oi) and T. Urata (Nihondaira Observatory). Measurer:
Urata. From Nihondaira Obs. Circ. No. 698.
A. C. Gilmore (Carter Observatory). Measurer: P. M. Kilmartin.
The following improved orbital elements, by the undersigned,
are from 21 observations Oct. 6 to 16:
T = 1975 Dec. 25.864 ET Peri. = 246.275
Node = 277.991 1950.0
q = 1.60349 AU Incl. = 91.622
1975 ET R. A. (1950) Decl. Delta r m1
Oct. 25 8 34.12 -10 44.6 1.726 1.806 9.3
30 8 36.59 -15 19.9
Nov. 4 8 38.53 -20 22.4 1.558 1.749 8.9
9 8 39.78 -25 51.9
14 8 40.19 -31 46.6 1.431 1.700 8.6
19 8 39.50 -38 02.2
24 8 37.32 -44 31.8 1.358 1.661 8.4
29 8 33.07 -51 06.2
Dec. 4 8 25.77 -57 34.5 1.347 1.631 8.3
9 8 13.78 -63 45.3
14 7 54.16 -69 26.8 1.394 1.612 8.3
m1 = 5.5 + 5 log Delta + 10 log r
Selected total visual magnitude estimates: Oct. 14.43 UT, ~ 9
(D. Green and T. Rokoske, Boone, North Caro1ina, 20-cm f/6 reflector);
18.47, 10.0 (B. Hudgens, Clinton, Mississippi, 25-cm f/6 reflector);
19.48, 10.0 (P. Maley, Houston, Texas, 13-cm f/5 refractor);
21.41, 9.5 (J. Bortle, Brooks Observatory, 32-cm reflector).
R CORONAE BOREALIS
Independent communications from the Variable Star Section of
the British Astronomical Association and from the American Association
of Variable Star Observers show that this star has started to
decline in brightness. Visual magnitude estimates are: Oct. 3.05
UT, 5.9 (G. Kelley); 14.01, 6.2 (Kelley); 14.78, 6.6 (M. Hapgood);
15.78, 6.7 (J. Isles); 20.99, 7.0 (Kelley); 21.99, 7.2 (M. Mattei);
22.1, 7.2 (J. Bortle).
3U 0352+30
N. E. White, K. O. Mason and P. W. Sanford, Mullard Space
Science Laboratory, report that four Copernicus observations of 3U
0352+30 (= X Per) show that the 2.5-7.5 keV flux is pulsed with a
period of 13.924 +/- 0.007 min, stable to within 0.027 min over 3
years. The peak to mean amplitude is 37 percent, constant to
within 5 percent.
NOVA MONOCEROTIS 1975
R. F. Jameson, Astronomy Department, Leicester University,
reports the following 2.2-um magnitudes, obtained using the 152-cm
telescope on Tenerife: Sept. 24-25, 9.9; Oct. 1.13, 10.46; 3.13,
10.38. The errors are 3.2, 2.6 and 3.0 sigma, respectively.
E. L. Robinson and R. E. Nather, Department of Astronomy,
University of Texas at Austin, write: "The x-ray nova was observed in
white light with the high-speed photometer at McDonald Observatory
on Oct. 10 UT. The light curve was analyzed for both random and
periodic luminosity variations on timescales between 2 and 200 sec.
There were no random variations with amplitudes greater than 0.01
magnitude and no periodic variations with amplitudes greater than
0.001 magnitude."
J. Bortle provides the following visual magnitude estimates:
Oct. 3.40, 11.9; 4.35, 11.9; 8.38, 11.9; 21.41, 12.2; 22.40, 12.2.
1973 EC
E. Roemer, University of Arizona, communicates the following
precise positions, obtained by R. McCallister and herself with the
Steward Observatory's 229-cm reflector. Measurer: C. C. McCarthy.
1975 UT R. A. (1950) Decl.
Aug. 8.41092 2 25 02.55 +25 00 56.3
8.43368 2 25 04.20 +25 01 07.8
1975 October 23 (2854) Brian G. Marsden
Read IAUC 2855
Our Web policy. Index to the CBAT/MPC/ICQ pages.
