Periodic Comet Gehrels 3 (1975o)

The following precise positions have been reported: 1975/76 UT R. A. (1950) Decl. Observer Dec. 7.20903 1 32 19.15 +10 17 21.2 Roemer 7.23264 1 32 18.87 +10 17 19.3 " 29.04925 1 32 18.75 +10 10 24.4 Shao Jan. 27.18733 1 44 29.24 +11 11 49.0 Roemer Feb. 25.01155 2 07 18.98 +13 09 26.4 Schwartz 26.02105 2 08 15.82 +13 14 14.7 " E. Roemer (University of Arizona). Dec. 7: Lunar and Planetary Lab. 154-cm reflector. Jan. 27: Steward Obs. 229-cm reflector; D. Daniels assisted. Measurers: W. Smith and C. D. Vesely. C. Y. Shao and G. Schwartz (Harvard Obs.). Measurer: J. H. Bulger. The following improved elements, by B. G. Marsden, are from 14 observations 1975 Oct. 27 to 1976 Feb. 26, perturbations included: T = 1977 Apr. 23.0257 ET Epoch = 1977 Apr. 7.0 ET Peri. = 231.4712 e = 0.152339 Node = 242.5584 1950.0 a = 4.038677 AU Incl. = 1.1010 n = 0.1214354 q = 3.423429 AU P = 8.116 years 1976/77 ET R. A. (1950) Decl. Delta r m2 July 21 5 13.88 +22 55.0 4.298 3.561 19.7 31 5 26.84 +23 05.6 Aug. 10 5 39.31 +23 11.9 4.078 3.543 19.5 20 5 51.17 +23 14.3 30 6 02.28 +23 13.1 3.816 3.526 19.4 Sept. 9 6 12.45 +23 09.2 19 6 21.54 +23 03.1 3.526 3.510 19.2 29 6 29.32 +22 55.8 Oct. 9 6 35.60 +22 48.1 3.225 3.495 19.0 19 6 40.18 +22 40.9 29 6 42.83 +22 35.0 2.937 3.481 18.8 Nov. 8 6 43.42 +22 30.9 18 6 41.86 +22 29.0 2.692 3.469 18.6 28 6 38.20 +22 28.9 Dec. 8 6 32.72 +22 30.2 2.525 3.458 18.4 18 6 25.88 +22 32.1 28 6 18.33 +22 33.6 2.466 3.449 18.3 Jan. 7 6 10.89 +22 34.3 17 6 04.32 +22 34.4 2.526 3.441 18.4 27 5 59.25 +22 34.0 Feb. 6 5 56.15 +22 33.8 2.692 3.434 18.5 16 5 55.20 +22 34.0 26 5 56.45 +22 34.7 2.929 3.429 18.7 Mar. 8 5 59.80 +22 35.6 18 6 05.06 +22 36.1 3.205 3.426 18.9 28 6 12.03 +22 35.5 Apr. 7 6 20.48 +22 32.9 3.488 3.424 19.1 17 6 30.20 +22 27.7 27 6 40.98 +22 19.0 3.757 3.424 19.2 May 7 6 52.64 +22 06.4 17 7 05.01 +21 49.3 3.995 3.425 19.4 27 7 17.95 +21 27.4 June 6 7 31.32 +21 00.4 4.190 3.427 19.5