Periodic Comet Giacobini-Zinner

The following ephemeris, by D. K. Yeomans, is from Handb. Br. Astron. Assoc. for 1978: For dT = +1d 1978 ET R. A. (1950) Decl. Delta r dR.A. dDecl. Mag. Apr. 2 16 15.90 + 2 27.9 2.754 3.440 -0m64 - 1'7 21.1 12 16 13.29 + 4 19.8 -0.68 - 2.0 22 16 08.50 + 6 17.5 2.450 3.304 -0.71 - 2.4 20.6 May 2 16 01.64 + 8 15.7 -0.73 - 2.9 12 15 53.01 +10 07.3 2.245 3.163 -0.74 - 3.4 20.3 22 15 43.20 +11 45.0 -0.73 - 4.0 June 1 15 32.95 +13 02.3 2.150 3.016 -0.71 - 4.5 20.0 11 15 23.12 +13 54.5 -0.67 - 4.9 21 15 14.54 +14 20.2 2.151 2.863 -0.63 - 5.1 19.7 July 1 15 07.84 +14 20.4 -0.58 - 5.2 11 15 03.44 +13 58.1 2.213 2.705 -0.54 - 5.2 19.5 21 15 01.56 +13 17.2 -0.51 - 5.0 31 15 02.23 +12 21.6 2.299 2.541 -0.48 - 4.7 19.4 Aug. 10 15 05.40 +11 14.8 -0.47 - 4.4 20 15 10.96 + 9 59.9 2.375 2.371 -0.47 - 4.1 19.1 30 15 18.78 + 8 39.4 -0.48 - 3.7 Sept. 9 15 28.77 + 7 15.3 2.421 2.195 -0.50 - 3.2 18.8 19 15 40.86 + 5 49.5 -0.54 - 2.8 29 15 54.99 + 4 23.2 2.424 2.013 -0.58 - 2.3 18.5 Oct. 9 16 11.18 + 2 58.1 -0.64 - 1.8 19 16 29.47 + 1 35.4 2.381 1.828 -0.71 - 1.2 18.0 29 16 49.92 + 0 16.5 -0.81 - 0.7 Nov. 8 17 12.67 - 0 57.1 2.295 1.640 -0.91 - 0.1 17.5 18 17 37.82 - 2 03.8 -1.04 + 0.5 28 18 05.53 - 3 02.0 2.179 1.454 -1.20 + 1.1 16.8