Central Bureau for Astronomical Telegrams
IAUC 3249: P/SCHWASSMANN-WACHMANN 1; P/TUTTLE-GIACOBINI-KRESAK; 1977p; 1977s
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Read IAUC 3250
Circular No. 3249
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 617-864-5758
PERIODIC COMET SCHWASSMANN-WACHMANN 1
The following ephemeris, by P. Herget, is from Publ. Cincinnati
Obs. (1968) No. 23:
1978/79 ET R. A. (1950) Decl. Delta r
Sept. 9 7 13.33 +27 24.0 6.482 6.032
19 7 18.98 +27 15.8 6.343 6.036
29 7 23.77 +27 09.0 6.194 6.040
Oct. 9 7 27.60 +27 04.0 6.040 6.044
19 7 30.35 +27 01.1 5.884 6.048
29 7 31.95 +27 00.5 5.730 6.052
Nov. 8 7 32.32 +27 02.2 5.582 6.056
18 7 31.40 +27 06.0 5.446 6.060
28 7 29.27 +27 11.4 5.326 6.064
Dec. 8 7 25.98 +27 17.6 5.228 6.067
18 7 21.73 +27 23.8 5.155 6.071
28 7 16.77 +27 28.9 5.112 6.075
Jan. 7 7 11.42 +27 32.2 5.099 6.079
17 7 06.05 +27 32.8 5.117 6.082
27 7 01.03 +27 30.6 5.167 6.086
Feb. 6 6 56.70 +27 25.6 5.246 6.090
16 6 53.32 +27 18.0 5.351 6.093
26 6 51.07 +27 08.2 5.477 6.097
Mar. 8 6 50.03 +26 56.8 5.619 6.101
18 6 50.27 +26 44.0 5.774 6.104
28 6 51.72 +26 30.1 5.935 6.108
Apr. 7 6 54.32 +26 15.3 6.099 6.111
17 6 57.95 +25 59.5 6.261 6.115
27 7 02.50 +25 42.8 6.418 6.118
May 7 7 07.87 +25 25.1 6.566 6.122
PERIODIC COMET TUTTLE-GIACOBINI-KRESAK
The following ephemeris is from Handb. Br. Astron. Assoc. for
1978 with an extension into 1979. Although the comet is predicted
to be very faint, it is not impossible that there will be a surge
in brightness, as occurred on two occasions in 1973
For dT = +1d
1978/79 ET R. A. (1950) Decl. Delta r dR.A. dDecl. Mag.
Sept. 9 9 10.74 +12 19.7 2.524 1.719 -1m38 + 2'6 21.7
19 9 38.50 +10 36.1 -1.51 + 3.5
29 10 07.68 + 8 35.7 2.281 1.560 -1.64 + 4.5 21.4
Oct. 9 10 38.42 + 6 18.6 -1.79 + 5.5
19 11 10.86 + 3 46.0 2.060 1.410 -1.93 + 6.6 21.1
29 11 45.14 + 1 00.1 -2.08 + 7.5
Nov. 8 12 21.36 - 1 55.1 1.883 1.278 -2.22 + 8.2 20.8
18 12 59.51 - 4 53.7 -2.34 + 8.5
28 13 39.46 - 7 48.1 1.766 1.179 -2.44 + 8.5 20.6
Dec. 8 14 20.90 -10 29.5 -2.49 + 7.9
18 15 03.29 -12 49.0 1.718 1.128 -2.49 + 6.9 20.4
28 15 45.95 -14 39.4 -2.44 + 5.6
Jan. 7 16 28.07 -15 56.3 1.731 1.135 -2.33 + 4.1 20.4
17 17 08.86 -16 38.6 -2.18 + 2.8
27 17 47.68 -16 48.5 1.782 1.198 -2.01 + 1.6 20.6
Feb. 6 18 24.02 -16 30.2 -1.82 + 0.8
16 18 57.63 -15 49.4 1.845 1.306 -1.64 + 0.2 20.8
26 19 28.43 -14 51.7 -1.47 - 0.2
Mar. 8 19 56.41 -13 42.5 1.897 1.443 -1.31 - 0.3 21.1
18 20 21.68 -12 26.5 -1.18 - 0.3
28 20 44.36 -11 07.8 1.921 1.596 -1.07 - 0.2 21.4
Apr. 7 21 04.55 - 9 49.9 -0.99 - 0.1
17 21 22.31 - 8 35.7 1.908 1.756 -0.92 + 0.1 21.6
27 21 37.70 - 7 27.8 -0.87 + 0.2
May 7 21 50.67 - 6 28.7 1.857 1.919 -0.84 + 0.3 21.7
PERIODIC COMET SANGUIN (1977p)
The following precise positions have been reported:
1977/78 UT R. A. (1950) Decl. Observer
Nov. 12.99979 23 08 05.43 -10 59 56.3 McCrosky
Dec. 14.54583 0 01 40.00 - 9 47 56.7 Candy
Jan. 31.99264 1 28 24.75 - 3 15 38.1 Bulger
R. E. McCrosky and J. H. Bulger (Harvard College Observatory).
M. P. Candy (Perth Observatory, Bickley). 33-cm astrograph.
PERIODIC COMET VAN BIESBROECK (1977s)
Further precise positions have been reported as follows:
1978/79 UT R. A. (1950) Decl. m1 Observer
Apr. 10.31730 14 58 38.74 - 7 42 37./7 Shao
12.00320 14 57 59.32 - 7 35 11.9 15 Chernykh
12.01309 14 57 59.03 - 7 35 10.5 "
May 4.19392 14 45 52.49 - 5 56 22.1 Bulger
5.93938 14 44 45.30 - 5 49 18.7 15 Chernykh
5.94979 14 44 44.83 - 5 49 16.1 "
C.-Y. Shao and J. H. Bulger (Harvard College Observatory).
N. S. Chernykh (Crimean Astrophysical observatory). Measurer:
L. G. Karachkina. Communicated by G. R. Kastel'.
1978 July 31 (3249) Brian G. Marsden
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