Central Bureau for Astronomical Telegrams
IAUC 3085: 1977f; 1977e; 3U 1735-44 = 2S 1735-444
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Read IAUC 3086
Circular No. 3085
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 Telex: 921428
Telephone: (617) 864-5758
PERIODIC COMET KOWAL (1977f)
Further positions have been reported as follows:
1977 UT R. A. (1950) Decl. m1 Observer
May 19.55347 13 50 28 -12 06.7 18 Seki
19.58056 13 50 27.3 -12 06 42 "
June 17.10899 13 44 12.49 -11 45 56.8 19 Shao
T. Seki (Geisei). From Orient. Astron. Assoc. Comet Bull. No. 148.
C.-Y. Shao (Harvard College Observatory, Agassiz Station). 155-cm
reflector. Comet image weak and diffuse.
The following improved orbital elements satisfy the Palomar
and Agassiz observations Apr. 24 to June 17 within 0".5:
T = 1977 Mar. 3.707 ET
Peri. = 179.046 e = 0.23766
Node = 28.431 1950.0 a = 6.11747 AU
Incl. = 4.354 n = 0.065140
q = 4.66357 AU P = 15.13 years
1977 ET R. A. (1950) Decl. Delta r m2
June 26 13 44.38 -11 50.4 4.170 4.685 19.3
July 6 13 45.80 -12 01.9
16 13 48.45 -12 19.9 4.466 4.693 19.5
26 13 52.28 -12 43.9
Aug. 5 13 57.19 -13 13.3 4.774 4.702 19.6
15 14 03.06 -13 47.3
25 14 09.80 -14 25.1 5.069 4.712 19.8
Sept. 4 14 17.32 -15 06.0
14 14 25.52 -15 49.2 5.329 4.724 19.9
24 14 34.33 -16 33.9
Oct. 4 14 43.64 -17 19.5 5.538 4.736 20.0
m2 = 9.5 + 5 log Delta + 10 log r
COMET HELIN (1977e)
The following precise positions have been reported:
1977 UT R. A. (1950) Decl. m1 Observer
Apr. 18.03971 12 32 45.97 - 7 46 59.8 McCrosky
19.16270 12 28 11.50 - 8 34 04.0 "
20.17616 12 23 58.92 - 9 17 25.6 "
22.07745 12 15 53.45 -10 40 55.3 15-16 Bulger
May 8.51181 11 00 26.7 -23 20 33.2 14 Furuta
8.51994 11 00 24.8 -23 20 53.8 "
R. E. McCrosky and J. H. Bulger (Harvard College Observatory, Agassiz
Station). 155-cm reflector. Measurer: Bulger.
T. Furuta (Tokai). From Orient. Astron. Assoc. Comet Bull. No. 148.
The following improved parabolic orbit, by the undersigned, is
based on 30 observations Apr. 16 to May 15:
T = 1977 June 30.9729 ET Peri. = 249.3525
Node = 19.4429 1950.0
q = 1.117568 AU Incl. = 43.1893
1977 ET R. A. (1950) Decl. Delta r m2
July 26 7 00.01 -58 39.7 0.820 1.189 16.3
31 6 41.60 -60 31.1
Aug. 5 6 20.10 -62 22.4 0.820 1.252 16.5
10 5 54.43 -64 10.3
15 5 23.36 -65 48.4 0.817 1.330 16.8
20 4 45.91 -67 06.4
25 4 02.17 -67 50.2 0.819 1.419 17.1
30 3 14.26 -67 45.5
Sept. 4 2 26.29 -66 43.1 0.835 1.517 17.4
9 1 42.57 -64 43.0
14 1 05.74 -61 54.4 0.876 1.622 17.8
19 0 36.36 -58 31.0
24 0 13.66 -54 47.1 0.947 1.730 18.3
29 23 56.44 -50 54.8
Oct. 4 23 43.52 -47 03.3 1.053 1.841 18.8
9 23 33.95 -43 18.8
14 23 27.00 -39 45.2 1.191 1.954 19.3
19 23 22.14 -36 24.8
24 23 18.92 -33 18.3 1.359 2.069 19.8
29 23 17.04 -30 25.6
Nov. 3 23 16.23 -27 46.1 1.552 2.184 20.3
8 23 16.30 -25 18.9
13 23 17.11 -23 02.7 1.766 2.299 20.8
3U 1735-44 = 2S 1735-444
H. E. Bond, Louisiana State University, reports that an image-tube
spectrogram (dispersion 180 A/mm), obtained with the 400-cm
reflector at Cerro Tololo Interamerican Observatory, of McClintock's
candidate for the optical counterpart of this x-ray source (IAUC
3084) shows a featureless blue continuum with weak H-beta emission
superimposed on it. He II 4686 A and He I 5875 A may also be present
as very weak emission lines.
1977 July 1 (3085) Brian G. Marsden
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