Central Bureau for Astronomical Telegrams
IAUC 3236: P/SCHWASSMANN-WACHMANN 1; 1977l
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Read IAUC 3237
Circular No. 3236
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
Further precise positions have been reported as follows:
1977/78 UT R. A. (1950) Decl. Mag. Observer
Dec. 8.19444 5 14 44.63 +32 04 45.7 McCrosky
11.18139 5 13 03.18 +32 01 48.1 Schwartz
17.19810 5 09 40.01 +31 54 42.8 McCrosky
Mar. 29.19203 5 05 11.09 +29 18 11.9 17 Mrkos
29.80342 5 05 11.15 +29 18 20.1 "
R. E. McCrosky and G. Schwartz (Harvard College Observatory, Agassiz
Station). 155-cm reflector. Measurer: J. H. Bulger. Comet
conspicuously brighter on Dec. 11 than on Dec. 8 and 17.
A. Mrkos (Klet Observatory). 62.5-cm Maksutov telescope.
PERIODIC COMET CHERNYKH (1977l)
The following precise positions have been reported:
1977/78 UT R. A. (1950) Decl. m1 Observer
Sept. 8.84688 0 15 39.72 - 4 39 28.8 13.3 Bruwer
8.81251 0 15 39.04 - 4 39 36.0 "
Oct. 4.16042 0 03 02.96 - 6 53 41.8 12.5 "
4.17986 0 03 02.30 - 6 53 48.5 "
9.35586 0 00 48.14 - 7 13 03.1 Torres
9.45464 0 00 46.11 - 7 13 26.3 Gilmore
9.41686 0 00 45.54 - 7 13 31.4 "
11.11143 0 00 00.16 - 7 19 44.3 Torres
14.43039 23 58 35.22 - 7 31 13.1 Gilmore
14.45258 23 58 34.64 - 7 31 18.9 "
19.11928 23 56 47.67 - 7 44 45.8 Torres
Nov. 13.51042 23 54 19.50 - 1 50 34.9 Candy
14.12884 23 54 26.19 - 1 49 15.6 Torres
Dec. 12.73582 0 08 48.45 - 5 42 08.5 Chernykh
28.68690 0 23 40.33 - 3 44 40.5 "
Jan. 21.52083 1 01 03.81 + 0 50 45.6 Candy
Feb. 1.51840 1 11 13.44 + 2 42 34.5 Verveer
26.50868 1 41 23.28 + 5 59 23.1 Candy
J. A. Bruwer (South African Astronomical Observatory Annexe,
Hartbeespoort). Franklin-Adams camera.
C. Torres and S. Barros (University of Chile, Cerro El Roble Station).
Measurer: M. Wischnjewsky.
A. C. Gilmore (Carter Observatory). Measurer: P. M. Kilmartin.
M. P. Candy and A. Verveer (Perth Observatory, Bickley). 33-cm
astrograph. Suggestion of faint tail to northeast on Jan. 27.
N. S. Chernykh (Crimean Astrophysical Observatory). Corrections to
IAUC 3163 and 3223. From Kiev Komet. Tsirk. No. 229.
The following improved orbital elunents, by the undersigned,
are based on 221 observations 1977 Aug. 19 to 1978 Mar. 4. Perturbations
by all nine planets were taken into account.
T = 1978 Feb. 14.9343 ET Epoch = 1978 Feb. 21.0 ET
Peri. = 266.7020 e = 0.594355
Node = 134.1144 1950.0 a = 6.331669 AU
Incl. = 5.7278 n = 0.0618624
q = 2.568413 AU P = 15.93 years
1978/79 ET R. A. (1950) Decl. Delta r m2
July 31 6 30.60 +19 59.9 3.135 2.901 18.5
Aug. 10 6 47.07 +19 41.1
20 7 02.16 +19 29.9 3.658 2.911 18.6
30 7 17.59 +19 01.5
Sept. 9 7 31.43 +18 41.1 3.539 3.058 18.6
19 7 44.16 +18 14.0
29 7 55.69 +11 45.8 3.384 3.143 18.6
Oct. 9 8 05.85 +17 18.5
19 8 14.50 +16 53.1 3.201 3.231 18.6
29 8 21.50 +16 33.0
Nov. 8 8 26.67 +16 11.9 3.008 3.323 18.6
18 8 29.88 +16 10.0
28 8 31.02 +16 10.1 2.830 3.411 18.6
Dec. 8 8 30.01 +16 18.9
18 8 21.12 +16 36.2 2.701 3.514 18.6
28 8 22.41 +17 00.9
Jan. 7 8 16.31 +11 31.1 2.659 3.612 18.1
17 8 09.61 +18 04.1
21 8 02.79 +18 31.3 2.132 3.111 18.9
Feb. 6 7 56.57 +19 08.3
16 7 51.53 +19 35.4 2.924 3.811 19.1
26 7 48.05 +19 57.5
Mar. 8 7 46.33 +20 14.1 3.211 3.911 19.5
18 7 46.42 +20 25.2
28 7 48.23 +20 30.9 3.576 4.012 19.8
Apr. 7 7 51.63 +20 31.4
11 7 56.42 +20 26.9 3.969 4.113 20.1
27 8 02.41 +20 11.7
May 7 8 09.40 +20 03.8 4.366 4.214 20.4
m2 = 11.0 + 5 log Delta + 10 log r
1978 June 30 (3236) Brian G. Marsden
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