coPC THE ASTRONOMICAL JOURNAL VOLUME 71, NUMBER 6 AUGUST 1966 TY996I Observations of Comets, Minor Planets, and Satellites Elizabeth Roemer* and Richard E. Lloyd U. S. Naval Observatory, Flagstaff Station, Arizona (Received 10 May 1966) Accurate positions and descriptive notes are presented for 38 comets, 33 minor planets, 5 faint natural satellites, and Pluto, for which astrometric reduction of the series of Flagstaff observations has been completed. THE 1022 positions and descriptive notes presented reference star positions; therefore, she bears responsi- here supplement those given by Roemer (1965), bility for the accuracy of the results given here. who also described the program, the equipment used, Coma diameters and tail dimensions given in the and the procedures of observation and of reduction. Notes to Table I refer to the exposures taken for In this paper as in the earlier one, the participation astrometric purposes unless otherwise stated. In of those who shared in critical phases of the work is general, longer exposures show more extensive head and indicated in the Obs/Meas column of Table I according tail structure. to the following letters: For brighter comets the minimum exposure is determined by the necessity of recording measurable R=Elizabeth Roemer. images of 12th-13th magnitude reference stars. On Part-time assistants under contract Nonr-3342(00) such exposures the position of the nuclear condensation with Lowell Observatory: may be more or less obscured by the overexposed coma and be correspondingly difficult and uncertain to L = Richard E. Lloyd, measure. T = Maryanna Thomas, A colon has been used to indicate greater than normal S = Marjorie K. Sin ton. uncertainty in the datum concerned. The series of observations of many comets have been Summer student-trainees : concluded by unsuccessful efforts to record the object M = Brian G. Marsden (1960), on plates of the maximum exposure practicable. These plates have, however, generally been omitted from Lo=Bernadette G. Londak (1963), mention in the Notes. W=Daniel W. Weedman (1964), The observational part of this program was termi- D = Charles A. Dean (1965). nated in November 1965 in order that publication of results might be expedited. It is expected that the The senior author has carried out the final checking remaining several hundred positions will be published of all results and has decided the procedures to be used in the very near future. in resolving the all-too-frequent inconsistencies in REFERENCE * Present address : Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona, 85721. Roemer, E. 1965, Astron. J. 70, 397. {Table I appears on succeeding pages.) 443 © American Astronomical Society • Provided by the NASA Astrophysics Data System COpc 444 E. ROEMER AND R. E. LLOYD TY996I Table I. Positions of comets, minor planets, and satellites. UT 1950.0 Exp. Obs/Meas UT 1950.0 Exp. Obs/Meas 1954/*= 1955 VI Baade 1959t =1960 IV P/Väisälä 1957 1960 Sept. 20.45177 5h43m41?08 —27°58,08''3 40m R, R Apr. 16.24763 9hllm06?66 +25°14/00 !9 10“ R, T 20.48363 5 43 40.93 -27 58 25.3 40 R, R 16.26079 9 11 07.96 +25 13 59.2 10 R, T Nov. 26.34337 5 15 17.06 -36 57 16.6 60 R, T May 17.17242 10 11 34.18 +22 16 45.0 30 R, T 26.39046 5 15 14.98 -36 57 28.7 60 R, T 17.20081 10 11 37.92 +22 16 28.5 30 R, T June 18.19205 11 24 21.14 +15 43 25.6 30 R, T 1954 k =1956 I Haro-Chavira 18.21905 11 24 24.88 +15 43 01.2 30 R, T 1957 June 5.37382 16 26 00.56 +44 04 54.9 30 R, R 1960 e =1959 X Humason 5.40637 16 25 58.64 +44 04 42.2 30 R, R 1960 27.26472 16 07 28.32 +41 07 49.4 30 R, R June 23.23641 16 09 03.71 +41 47 21.9 10 R, R 27.29035 16 07 27.22 +41 07 35.4 30 R, R 23.27659 16 08 59.35 +41 47 20.2 10 R, R July 21.26640 15 54 48.15 +36 48 51.4 34 R, R 27.26001 16 01 59.88 +41 41 19.4 12 R, M 21.29549 15 54 47.45 +36 48 30.1 30 R, R 27.27317 16 01 58.49 +41 41 18.4 10 M, M Sept. 1.22032 15 52 12.78 +28 39 02.3 30f R, R 30.32792 15 56 51.26 +41 33 45.1 10 M, M 1.24583 15 52 13.16 +28 38 45.3 30 R, R 30.33900 15 56 50.17 +41 33 42.9 10 R, M 20.13458 15 57 17.55 +25 18 56.8 60 R, R July 13.24334 15 37 49.26 +40 38 59.0 10 R, M 20.18929 15 57 18.66 +25 18 23.0 60 R, R Aug. 2.30630 15 17 07.58 +38 27 37.3 15 R, M 1958 2.31876 15 17 07.02 +38 27 32.8 15 R, M Feb. 16.46460 17 05 46.08 +15 29 14.4' 60 R, R 17.18134 15 08 12.81 +36 38 00.4 30 R, T 16.50961 17 05 46.46 +15 29 19.6 60 R, R 17.20558 15 08 12.21 +36 37 50.3 30 R, T Apr. 13.38403 17 00 47.15 +17 14 06.0 90 R, R Sept. 25.11522 15 03 26.08 +32 30 30.8 30 R, T 13.45744 17 00 45.68 +17 14 13.8 90 R, R 25.13807 15 03 26.23 +32 30 24.0 30 R, T May 15.27898 16 45 55.24 +17 29 26.7 90 R, R Oct. 22.09946 15 09 33.73 +30 54 32.3 60 R, T 15.35793 16 45 52.72 +17 29 22.5 90 R, R Dec. 26.50628 15 30 06.29 +33 17 49.5 110 R, T 1961 1957 g = 1958 V P/Wolf-Harrington Jan. 17.43153 15 31 45.77 +36 22 18.1 100 R, R 1957 17.50147 15 31 45.59 +36 23 01.4 90 R, L Nov. 18.09737 Mar. 23.29920 14 46 47.31 +48 48 23.1 90 R, L 20 53 06.36 1 46 55.9 60 R, R 23.37262 14 46 41.06 +48 49 04.4 92 R, L 18.15139 20 53 08.93 1 46 51.9 60 R, R Apr. 21.08220 20 55 46.76 1 43 28.6 60 R, R 9.18446 14 20 20.36 +50 57 08.9 90 R, L 21.12721 20 55 49.30 1 43 26.1 60 R, R 9.25233 14 20 13.61 +50 57 32.5 90 R, L Dec. May 9.37958 13 30 18.76 +51 44 39.7 108 R, R 12.08326 21 18 34.50 1 51 03.6 60 R, M 14.42616 13 22 56.81 +51 30 59.0 90£ R, L 12.13036 21 18 37.86 1 51 08.1 60 R, M June 7.22257 12 55 29.07 +49 30 03.4 120 R, L 1958 7.32257 Sept. 14.47624 8 27 49.49 +12 40 51.4 15 R, R 12 55 23.64 +49 29 24.9 120 R, L 14.48940 8 27 51.51 +12 40 37.0 15 R, R 1960 i =1961 I P/Encke 21.47557 8 45 09.85 +10 33 10.3 15 R, M 1960 21.48941 8 45 11.87 +10 32 54.2 15 R, M Aug. 17.31153 1 31 02.52 + 18 57 48.1 60 R, R Oct. 13.49631 9 34 56.13 + 3 27 55.4 10 R, M 17.35723 1 31 02.14 13.50530 9 34 57.31 + 3 27 44.6 10 R, M +18 58 03.9 60 R, R Nov. 19.30877 1 30 45.95 +19 08 58.0 60 R, T 9.48490 10 25 44.06 - 5 25 21.3 30 R, M 19.35622 1 30 45.48 +19 09 11.7 65 R, T 9.50977 10 25 46.48 - 5 25 50.5 30 R, M Sept, 26.20040 0 54 14.53 +20 53 49.1 30 R, T 9.52639 10 25 48.06 - 5 26 09.7 10 R, M 26.22534 0 54 11.60 +20 53 46.8 30 R, T Dec. 10.44834 11 08 11.40 -14 56 16.4 30 R, R Oct. 22.14170 10.47189 11 08 12.86 -14 56 40.3 30 R, R 23 50 39.07 +1/ 36 57.5 10 R, T 1959 Nov. 8.23752 23 07 38.76 +13 14 07.4 10 R. T Jan. 8.24583 23 07 37.60 +13 13 59.0 10 R. T 12.39693 11 28 17.78 -23 00 59.2 60 R, M Dec. 20.14636 22 20 24.54 + 4 42 13.4 10 R, T Feb. 6.33479 11 21 28.56 -26 22 33.4 60 R, R 20.15468 22 20 6.38881 11 21 26.42 -26 22 46.9 60 R, R 24.36 + 4 42 09.4 10 R, T Mar.