Central Bureau for Astronomical Telegrams
IAUC 3128: 1977p; 1977l; 1977o
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Read IAUC 3129
Circular No. 3128
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 SANGUIN (1977p)
E. Helin, Hale Observatories, communicates the following precise
position, measured by J. Gibson, of a prediscovery image identified
by him on an exposure by S. J. Bus and T. Lauer:
1977 UT R. A. (1950) Decl. m1
Sept.13.26875 22 05 32.54 + 3 02 30.7 14.5
The following elliptical elements have been determined by the
undersigned from the six precise positions, Sept. 13 to Oct. 21:
T = 1977 Sept. 17.688 ET
Peri. = 162.156 e = 0.66561
Node = 182.253 1950.0 a = 5.41778 AU
Incl. = 18.657 n = 0.078158
q = 1.81167 AU P = 12.61 years
1977/78 ET R. A. (1950) Decl. Delta r m1
Nov. 13 23 08.11 -11 00.0 1.277 1.903 16.8
23 23 24.43 -11 05.2
Dec. 3 23 41.46 -10 42.4 1.533 1.975 17.4
13 23 58.95 - 9 57.1
23 0 16.72 - 8 54.7 1.820 2.063 17.9
Jan. 2 0 34.63 - 7 39.9
12 0 52.58 - 6 16.3 2.128 2.164 18.5
PERIODIC COMET CHERNYKH (1977l)
The following precise positions have been reported:
1977 UT R. A. (1950) Decl. m1 Observer
Sept. 5.65938 0 16 50.56 - 4 23 05.0 Candy
6.94892 0 16 22.80 - 4 29 43.9 13.6 Mrkos
6.96322 0 16 22.52 - 4 29 50.4 "
8.18561 0 15 54.96 - 4 36 05.0 Shao
9.89449 0 15 14.58 - 4 45 03.6 13.4 Vavrova
9.91116 0 15 14.22 - 4 45 07.7 "
12.93396 0 13 57.17 - 5 01 14.1 13.4 "
12.94993 0 13 56.83 - 5 01 18.3 "
29.70833 0 05 37.28 - 6 29 55.4 Verveer
Oct. 4.21042 0 03 19.31 - 6 51 21.9 Giclas
4.68542 0 03 04.87 - 6 53 23.5 Candy
5.19306 0 02 49.92 - 6 55 45.4 Giclas
6.5490 0 02 09.7 - 7 01 36 13 Furuta
11.47282 23 59 51.25 - 7 21 12.5 12 Seki
11.54861 23 59 49.11 - 7 21 27.0 "
11.60764 23 59 47.40 - 7 21 42.6 13 Tsuchiya
11.62436 23 59 47.04 - 7 21 46.0 "
12.63958 23 59 20.26 - 7 25 14.6 Candy
14.53472 23 58 32.48 - 7 31 40.3 13 Urata
14.54039 23 58 32.44 - 7 31 40.9 "
15.51319 23 58 09.09 - 7 34 45.0 13 "
15.52153 23 58 08.72 - 7 34 44.5 "
17.51076 23 57 23.40 - 7 40 31.3 13 "
17.52257 23 57 23.03 - 7 40 32.3 "
17.57292 23 57 21.97 - 7 40 36.0 Candy
17.60417 23 57 21.20 - 7 40 40.5 "
18.29528 23 57 06.17 - 7 42 38.2 Giclas
M. P. Candy and A. Verveer (Perth Observatory, Bickley). The Sept.
5 position is a remeasurement of that on IAUC 3102.
A. Mrkos and Vavrova (Klet Observatory)
C.-Y. Shao (Harvard College Observatory). Measurer: J. H. Bulger.
H. L. Giclas (Lowell Observatory). Measurer: M. L. Kantz.
T. Furuta (Kagiya, Aichi). Communicated by T. Seki.
T. Seki (Kochi Observatory, Geisei Station).
K. Tsuchiya (JCPM Asahikawa Station). From Japan Astron. Circ. No.
121, with times corrected. Measurer: M. Takeishi
T. Urata (JCPM Yakiimo Station). From Nihondaira Obs. Circ. No. 913.
The following improved orbital elements, by the undersigned,
are from 83 observations Aug. 19 to Oct. 18:
T = 1978 Feb. 14.7438 ET
Peri. = 266.6669 e = 0.594029
Node = 134.1055 1950.0 a = 6.325839 AU
Incl. = 5.7260 n = 0.0619479
q = 2.568104 AU P = 15.91 years
Further total visual magnitude estimates by J. Bortle, Brooks
Observatory (32-cm reflector): Oct. 13.06 UT, 12.9; 31.01, 12.7.
PERIODIC COMET SCHUSTER (1977o)
L. D. Schmadel, Astronomisches Rechen-Institut, provides the
following measurements from plates taken by H.-E. Schuster at the
European Southern Observatory. The time of the first observation
has been changed (cf. IAUC 3123).
1977 UT R. A. (1950) Decl.
Sept. 6.13507 0 08 11.48 -38 55 33.4
6.23542 0 08 06.14 -38 56 03.1
7.13889 0 07 19.90 -39 00 12.8
1977 November 4 (3128) Brian G. Marsden
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