Central Bureau for Astronomical Telegrams
IAUC 3155: 1973 V; 1977k; 1977q; COMETARY NEBULA NEAR NGC 7023
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Read IAUC 3156
Circular No. 3155
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 CLARK (1973 V)
The following prediction, by B. G. Marsden, is from 40
observations 1973 June 1 to Nov. 21, perturbations by Mercury to Pluto
considered. The uncertainty in T is < 1 day.
T = 1978 Nov. 26.3298 ET Epoch = 1978 Nov. 28.0 ET
Peri. = 209.0446 e = 0.500949
Node = 59.0799 1950.0 a = 3.120025 AU
Incl. = 9.4993 n = 0.1788409
q = 1.557053 AU P = 5.511 years
For dT = +1d
1978 ET R. A. (1950) Decl. Delta r dR.A. dDecl. m2
Feb. 21 11 22.73 +19 35.9 1.835 2.791 -1m16 + 7.1 21.3
Mar. 3 11 13.68 +20 44.1 -1.20 + 6.9
13 11 03.54 +21 41.4 1.725 2.683 -1.20 + 6.5 21.0
23 10 53.42 +22 20.2 -1.18 + 6.0
Apr. 2 10 44.48 +22 36.3 1.722 2.573 -1.13 + 5.5 20.8
12 10 37.66 +22 28.3 -1.07 + 5.2
22 10 33.61 +21 57.8 1.800 2.461 -1.00 + 4.9 20.7
May 2 10 32.52 +21 07.5 -0.94 + 4.9
12 10 34.38 +20 00.2 1.921 2.349 -0.89 + 4.9 20.6
22 10 39.00 +18 38.5 -0.85 + 5.1
June 1 10 46.06 +17 04.3 2.052 2.236 -0.82 + 5.3 20.6
11 10 55.29 +15 18.7 -0.80 + 5.6
21 11 06.43 +13 22.7 2.172 2.125 -0.79 + 6.0 20.5
July 1 11 19.22 +11 17.0 -0.79 + 6.4
11 11 33.52 + 9 02.0 2.272 2.016 -0.80 + 6.9 20.3
21 11 49.17 + 6 38.4 -0.82 + 7.4
31 12 06.09 + 4 06.8 2.345 1.912 -0.84 + 7.8 20.2
Aug. 10 12 24.24 + 1 27.9 -0.87 + 8.3
20 12 43.59 - 1 17.2 2.394 1.815 -0.91 + 8.7 20.0
30 13 04.18 - 4 07.1 -0.96 + 9.1
Sept. 9 13 26.06 - 7 00.1 2.423 1.728 -1.02 + 9.5 19.8
19 13 49.28 - 9 54.2 -1.08 + 9.7
29 14 13.93 -12 46.6 2.439 1.656 -1.15 + 9.8 19.6
PERIODIC COMET AREND-RIGAUX (1977k)
The following precise positions have been reported:
1977 UT R. A. (1950) Decl. m1 Observer
Nov. 4.74444 2 21 27.56 -26 21 13.5 Jekabsons
11.61215 2 16 36.64 -26 31 14.4 15 Suzuki
11.61806 2 16 36.36 -26 31 16.6 "
18.62917 2 12 12.83 -26 07 48.9 Jekabsons
30.45313 2 07 39.8 -24 12 08 13.5 Urata
30.47639 2 07 39.7 -24 11 54 "
Dec. 1.51806 2 07 28.64 -23 57 17.2 13.5 Suzuki
4.06381 2 07 13.37 -23 18 42.1 14 Schuster
4.62361 2 07 11.59 -23 09 41.0 Candy
5.03615 2 07 11.61 -23 02 58.1 Schuster
P. Jekabsons and M. P. Candy (Perth Observatory, Bickley).
K. Suzuki (JCPM Oi Station) and T. Urata (JCPM Yakiimo Station).
Measurer: Urata. From Nihondaira Obs. Circ. No. 931.
H.-E. Schuster and G. Pizarro (European Southern Observatory).
Measurer: R. M. West.
COMET TSUCHINSHAN (1977q)
Further precise positions have been reported as follows:
1977 UT R. A. (1950) Decl. Mag. Observer
Nov. 10.58021 1 08 44.48 + 1 44 07.5 Kojima
12.11147 1 05 37.11 + 1 31 27.4 Torres
13.54722 1 02 45.16 + 1 19 52.6 Candy
14.15176 1 01 33.92 + 1 15 06.1 Torres
15.22745 0 59 29.01 + 1 06 48.2 "
16.16703 0 57 41.86 + 0 59 44.3 "
30.41111 0 34 20.13 - 0 27 43.6 15 Urata
30.41664 0 34 19.85 - 0 27 44.5 "
30.46244 0 34 15.58 - 0 27 57.7 14.5 Seki
Dec. 3.51146 0 30 10.98 - 0 41 47.8 15 Natori
3.51858 0 30 10.62 - 0 41 46.3 "
5.52240 0 27 39.75 - 0 49 54.4 15 Seki
9.46771 0 23 06.93 - 1 03 59.9 15 Natori
9.47367 0 23 06.41 - 1 04 03.2 "
N. Kojima (Ishiki). From Orient. Astron. Assoc. Comet Bull. No. 156.
C. Torres (University of Chile, Cerro El Roble Station). Measurer:
M. Wischnjewsky. Fanshaped tail 5' long to east-northeast.
M. P. Candy (Perth Observatory, Bickley). 33-cm astrograph.
T. Urata and A. Natori (JCPM Yakiimo Station). 31-cm reflector.
Measurer: Urata. From Nihondaira Obs. Circ. Nos. 926 and 931.
T. Seki (Geisei). Time changed by +1 hour on Nov. 30.
COMETARY NEBULA NEAR NGC 7023
J. Bortle, Brooks Observatory, reports that the fan nebula (cf.
IAUC 3095) has continued to brighten and was still quite obvious on
Nov. 12. Visual magnitudes of the stellar object: Sept. 4.1 UT,
14.5; Oct. 5.1, ~ 14.8; 31.1, 14.7; Nov. 12.0, [14.5.
1977 December 30 (3155) Brian G. Marsden
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