OAA computing section circular NK 490 Periodic Comet Smirnova-Chernykh: from NK 445 orbit.
T = 1984 Feb. 21.36242 ET Epoch = 1986 June 19.0 ET Peri. = 90.92617 e = 0.1454035 Node = 77.03712 (1950.0) a = 4.1649457 AU Inc. = 6.64361 nß= 0.11595515 q = 3.5593479 AU P = 8.500 years Periodic Comet Wild 2: from NK 369 orbit. T = 1984 Aug. 20.56590 ET Epoch = 1986 June 19.0 ET Peri. = 41.04773 e = 0.5535122 Node = 136.01179 (1950.0) a = 3.4013411 AU Inc. = 3.28197 nß= 0.15711903 q = 1.5186572 AU P = 6.273 years Periodic Comet Neujmin 2: from Marsden orbit (IAUC 2977). T = 1987 Apr. 2.39770 ET Epoch = 1987 Mar. 26.0 ET Peri. = 214.93810 e = 0.5865209 Node = 307.15230 (1950.0) a = 3.0749535 AU Inc. = 5.36526 nß= 0.18278739 q = 1.2714290 AU P = 5.392 years Periodic Comet Gehrels 1: from NK 304 orbit. T = 1987 Aug. 14.80979 ET Epoch = 1987 Sept. 2.0 ET Peri. = 28.46344 e = 0.5100351 Node = 12.91895 (1950.0) a = 6.0985002 AU Inc. = 9.61087 nß= 0.06544395 q = 2.9880508 AU P = 15.060 years Periodic Comet Wild 3: from NK 433 orbit. T = 1987 Aug. 31.25613 ET Epoch = 1987 Sept. 2.0 ET Peri. = 179.56293 e = 0.3673093 Node = 71.99221 (1950.0) a = 3.6225409 AU Inc. = 15.45476 nß= 0.14294999 q = 2.2919479 AU P = 6.895 years Periodic Comet Schwassmann-Wachmann 1: from Marsden orbit (MPC 4830). T = 1989 Sept.17.65647 ET Epoch = 1986 June 19.0 ET Peri. = 47.02790 e = 0.0455481 Node = 312.11670 (1950.0) a = 6.0568666 AU Inc. = 9.35630 nß= 0.066119881 q = 5.7809881 AU P = 14.906 years - continued - NK 490 - 2 Periodic Comet Gunn: from Marsden orbit (MPC 7773). T = 1989 Sept.24.92610 ET Epoch = 1986 June 19.0 ET Peri. = 197.13156 e = 0.3150506 Node = 67.89128 (1950.0) a = 3.5996013 AU Inc. = 10.37679 nß= 0.14431866 q = 2.4655446 AU P = 6.829 years * * * * * The following improved orbital elements are by T. Kobayashi. The full planetary perturbations were taken into account. The osculating orbits of Epoch 1986 June 19 will be published in the OAA Comet Hand- book 1986: Comet Bowell (1982I = 1980b) Epoch 1982 Mar. 12.0 ET = JDE 2445040.5 T 1982 Mar. 12.29354 ET q 3.3639436 (1950) P Q z -0.0170380 Peri. 134.88887 -0.35902810 +0.93294959 +/-0.0000013 Node 114.05384 -0.86425018 -0.32158933 e 1.0573150 Incl. 1.66490 -0.35237827 -0.16181894 From 164 observations 1980 Feb. 11-1984 Oct. 19, mean residual 1".15. Comet Austin (1982 VI = 1982g) Epoch 1982 Aug. 19.0 ET = JDE 2445200.5 T 1982 Aug. 24.72939 ET q 0.6478104 (1950) P Q z +0.0009152 Peri. 33.82614 +0.71538015 -0.41401019 +/-0.0000053 Node 325.56388 -0.61099994 +0.02015975 e 0.9994071 Incl. 84.48946 +0.33898425 +0.91004898 From 228 observations 1982 June 19-1983 Apr. 3, mean residual 1".26. Comet IRAS-Araki-Alcock (1983 VII = 1983d) Epoch 1983 May 26.0 ET = JDE 2445480.5 T 1983 May 21.25472 ET q 0.9913399 (1950) P Q z +0.0102278 Peri. 192.84550 -0.59931112 +0.35777359 +/-0.0000365 Node 48.40557 -0.62327394 +0.35282709 e 0.9898608 Incl. 73.24617 -0.50235026 -0.86458724 From 242 observations 1983 Apr. 27-1983 Oct. 4, mean residual 1".37. Comet Cernis (1983XII=1983l) Epoch 1983 July 5.0 ET = JDE 2445520.5 T 1983 July 21.21677 ET q 3.3178800 (1950) P Q z -0.0005803 Peri. 186.21823 +0.90725461 +0.24294562 +/-0.0000068 Node 208.88369 +0.40996915 -0.32862673 e 1.0019255 Incl. 134.70385 +0.09388489 -0.91267842 From 175 observations 1983 July 21-1985 July 22, mean residual 1".27. - continued - NK 490 - 3 Comet Shoemaker (1983 XV = 1983p) Epoch 1983 Dec. 12.0 ET = JDE 2445680.5 T 1983 Nov. 23.79430 ET q 3.3448933 (1950) P Q z -0.0000502 Peri. 176.03700 +0.97296838 -0.13683930 +/-0.0000066 Node 163.98399 -0.22605426 -0.39953266 e 1.0001678 Incl. 137.60368 -0.04724401 -0.90644838 From 99 observations 1983 Sept. 7-1984 Oct. 24, mean residual 1".24. Comet IRAS (1983 XVI = 1983o) Epoch 1983 Dec. 12.0 ET = JDE 2445680.5 T 1983 Nov. 28.00084 ET q 2.2547784 (1950) P Q z -0.0000891 Peri. 333.98191 -0.76266236 -0.57204690 +/-0.0000116 Node 200.56048 -0.33215970 -0.05403557 e 1.0002009 Incl. 120.74306 -0.55499194 +0.81843906 From 29 observations 1983 Aug. 4-1984 June 5, mean residual 1".33. Comet IRAS (1983VI=1983k) Epoch 1983 Apr. 16.0 ET = JDE 2445440.5 T 1983 May 2.71119 ET q 2.4180327 (1950) P Q z +0.0002131 Peri. 265.58168 -0.04012775 -0.99398431 +/-0.0000199 Node 171.09228 -0.43025202 +0.10923816 e 0.9994847 Incl. 138.84286 -0.90181648 -0.00788806 From 19 observations 1983 July 14-1984 May. 6, mean residual 1".43. Comet Hartley (1984v) Epoch 1985 Sept. 12.0 ET = JDE 2446320.5 T 1985 Sept. 28.32364 ET q 4.0006947 (1950) P Q z +0.0001169 Peri. 255.26076 +0.07848493 -0.34128770 +/-0.0000585 Node 249.51113 +0.60703410 -0.72894516 e 0.9995323 Incl. 89.33156 -0.79079057 -0.59343210 From 16 observations 1984 Nov. 17-1985 Mar. 20, mean residual 1".16. Comet Levy-Rudenko (1984t) Epoch 1984 Dec. 6.0 ET = JDE 2446040.5 T 1984 Dec. 14.25510 ET q 0.9179467 (1950) P Q z +0.0008754 Peri. 82.73906 +0.31111124 -0.83747832 +/-0.0000106 Node 330.46832 -0.09115536 +0.44425054 e 0.9991964 Incl. 65.70874 +0.94599181 +0.31823186 From 113 observations 1984 Nov. 14-1985 Apr. 24, mean residual 1".37. Comet Shoemaker (1984s) Epoch 1985 Jan. 15.0 ET = JDE 2446080.5 T 1985 Jan. 3.88776 ET q 1.2145115 (1950) P Q z +0.0239571 Peri. 229.23378 -0.01971256 -0.98644185 +/-0.0000124 Node 222.75699 +0.97429256 +0.01762501 e 0.9709038 Incl. 13.88561 +0.22442242 -0.16316197 From 113 observations 1984 Oct. 25-1985 May 22, mean residual 1".35. - continued - NK 490 - 4 Comet Austin (1984i) Epoch 1984 Aug. 8.0 ET = JDE 2445920.5 T 1984 Aug. 12.13717 ET q 0.2912832 (1950) P Q z +0.0005256 Peri. 353.12718 -0.99850884 +0.03327606 +/-0.0000041 Node 170.87755 +0.05312496 +0.77475523 e 0.9998469 Incl. 164.15971 -0.01256349 +0.63138502 From 76 observations 1984 July 8-1984 Nov. 27, mean residual 1".37. Comet Shoemaker (1984f) Epoch 1985 Sept. 12.0 ET = JDE 2446320.5 T 1985 Sept. 4.60005 ET q 2.6964265 (1950) P Q z -0.0002520 Peri. 235.46452 -0.65094748 +0.34866448 +/-0.0000092 Node 48.98520 +0.12302002 +0.92499130 e 1.0006794 Incl. 116.66105 -0.74908841 -0.15107671 From 62 observations 1984 May 27-1985 June 19, mean residual 1".30. Comet Shoemaker (1984r) Epoch 1984 Sept. 17.0 ET = JDE 2445960.5 T 1984 Sept. 3.95840 ET q 5.4889833 (1950) P Q z +0.0011625 Peri. 183.28805 +0.57747680 +0.81632428 +/-0.0003332 Node 238.01446 +0.74931456 -0.52431132 e 0.9936191 Incl. 179.21447 +0.32411146 -0.24230624 From 26 observations 1984 Oct. 23-1985 Feb. 16, mean residual 1".23. Director, Computing Section Syuichi Nakano 1986 January 1 ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1985 December 22