Central Bureau for Astronomical Telegrams
IAUC 2920: 1974c; 1974 XVI; 3U 1727-33
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Read IAUC 2921
Circular No. 2920
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 LOVAS (1974c)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. m1 Observer
Jan. 13.30519 14 29 10.42 -37 12 54.3 Torres
14.31138 14 30 01.45 -37 28 40.2 "
15.29501 14 30 51.21 -37 44 07.2 "
Apr. 11.30098 14 35 18.17 -63 56 58.4 Barros
18.37353 14 22 50.45 -65 47 46.8 Torres
20.24288 14 19 03.51 -66 14 34.1 "
June 12.06256 12 17 25.54 -69 46 55.8 "
13.02623 12 16 21.60 -69 44 07.5 "
Aug. 14.03480 13 06 57.23 -69 11 12.5 "
15.06800 13 09 30.18 -69 14 11.5 "
Oct. 7.33776 16 30 45.95 -70 38 44.4 Gilmore
8.40487 16 35 47.67 -70 35 17.3 "
31.38737 18 20 13.85 -68 01 59.3 14.4 Kilmartin
31.40880 18 20 19.24 -68 01 47.3 "
Nov. 30.41573 20 09 40.22 -61 34 30.8 15.0 Gilmore
Dec. 4.05696 20 20 35.95 -60 38 32.3 Torres
6.05521 20 26 24.38 -60 07 17.0 "
C. Torres and S. Barros (University of Chile, Cerro El Roble Station).
Measurer: M. Wischnjewsky. Computer: H. Wroblewski.
A. C. Gilmore and P. M. Kilmartin (Carter Observatory).
The following improved orbital elements, by B. G. Marsden, are
based on 91 observations 1974 Mar. 21 to 1975 Dec. 6:
Epoch = 1975 Aug. 16.0 ET
T = 1975 Aug. 22.1824 ET Peri. = 261.3644
e = 0.999595 Node = 11.6714 1950.0
q = 3.011442 AU Incl. = 50.6421
1976/77 ET R. A. (1950) Decl. Delta r m2
Apr. 12 0 07.79 -29 37.4 4.455 3.770 18.0
22 0 17.87 -28 06.8
May 2 0 27.08 -26 46.2 4.418 3.885 18.1
12 0 35.37 -25 36.0
22 0 42.66 -24 36.2 4.331 4.004 18.2
June 1 0 48.88 -23 46.9
11 0 53.91 -23 08.1 4.205 4.126 18.3
21 0 57.65 -22 39.5
July 1 0 59.98 -22 20.5 4.058 4.252 18.3
11 1 00.78 -22 10.4
21 0 59.97 -22 07.8 3.913 4.381 18.4
31 0 57.50 -22 11.0
Aug 10 0 53.36 -22 17.5 3.805 4.512 18.4
20 0 47.70 -22 24.4
30 0 40.72 -22 28.7 3.769 4.645 18.6
Sept. 9 0 32.78 -22 27.1
19 0 24.33 -22 17.1 3.838 4.780 18.7
29 0 15.86 -21 57.1
Oct. 9 0 07.88 -21 26.3 4.025 4.916 18.9
19 0 00.80 -20 45.1
29 23 54.92 -19 54.6 4.327 5.053 19.2
Nov. 8 23 50.44 -18 56.3
18 23 47.41 -17 52.1 4.716 5.191 19.5
28 23 45.82 -16 43.3
Dec. 8 23 45.58 -15 31.3 5.158 5.329 19.8
18 23 46.56 -14 17.2
28 23 48.61 -13 01.9 5.616 5.468 20.1
Jan. 7 23 51.59 -11 46.1
17 23 55.34 -10 30.3 6.054 5.608 20.4
27 23 59.73 - 9 14.9
Feb. 6 0 04.63 - 8 00.3 6.446 5.748 20.6
m2 = 9.0 + 5 log Delta + 10 log r
PERIODIC COMET HONDA-MRKOS-PAJDUSAKOVA (1974 XVI)
C. Torres, Department of Astronomy, University of Chile, provides
the following precise positions, obtained at Cerro El Roble:
1975 UT R. A. (1950) Decl.
Jan. 13.05935 21 21 15.20 -33 17 44.1
14.04542 21 22 24.25 -34 45 38.6
3U 1727-33
N. E. White, K. O. Mason and P. W. Sanford, Mullard Space
Science Laboratory; and C. Chevalier and S. A. Ilovaisky, Observatoire
de Meudon, write: "Observations at 2.5-7.5 keV in June 1973
reveal a 7m.84 +/- 0m.04 periodic modulation of peak to mean amplitude
23 percent of the mean flux. Because of our finite sampling frequency
(1m.45) the data would also be consistent with a modulation
period of 1m.77 and amplitude 46 percent. We note near the 3U error
box the presence of the ninth-magnitude highly-reddened emission-line
A-type supergiant CoD -33 12119 = AS 231 (cf. IAUC 2569)."
1976 March 3 (2920) Brian G. Marsden
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