OAA computing section circular NK 524 Periodic Comet Ciffreo 1985 XVI = 1985p
The following improved orbital elements, by S. Nakano, are from 73 observations 1985 Nov. 8 to 1986 Mar. 15. Perturbations by all nine planets were taken into account. The mean residual is +/- 1.13 arc seconds. Epoch = 1985 Oct. 22.0 ET T = 1985 Oct. 30.10560 +/- 0.00359 (m.e.) ET Peri. = 357.89969 +/- 0.00463 Node = 53.09979 +/- 0.00446 (1950.0) Inc. = 13.10114 +/- 0.00099 q = 1.7020664 +/- 0.0000771 AU e = 0.5440824 +/- 0.0000131 a = 3.7332763 +/- 0.0001307 AU nß = 0.13663718 +/- 0.00000717 P = 7.213 +/- 0.0003787 years (+/- 0.14 day) The predicted orbit for the 1993 return is as follows: T = 1993 Jan. 22.47644 ET Epoch = 1993 Jan. 13.0 ET Peri. = 358.01618 e = 0.5431052 Node = 53.03412 (1950.0) a = 3.7399340 AU Inc. = 13.08539 nß= 0.13627248 q = 1.7087565 AU P = 7.233 years The following residuals in seconds of arc are from the above orbital elements: Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1985 11 08.10312 04 32 47.49 +23 24 56.4 2.4+ 0.1- 010/IC 1985 11 08.80729 04 32 32.16 +23 36 39.0 ( 6.9+ 3.4-) 391/ko 1985 11 08.95000 04 32 29.23 +23 39 04.0 0.3- 1.4- 010/IC 1985 11 09.01285 04 32 27.47 +23 40 09.1 1.5- 0.2+ 010/IC 1985 11 09.64182 04 32 12.88 +23 50 39.3 ( 2.9+ 2.0-) 381/ks 1985 11 09.66682 04 32 11.24 +23 51 04.6 ( 9.7- 1.8-) 381/ks 1985 11 09.92951 04 32 05.79 +23 55 28.1 0.1- 0.5+ 010/IC 1985 11 09.93045 04 32 05.48 +23 55 29.4 0.3- 0.4+ 095/CR 1985 11 10.71731 04 31 44.85 +24 08 39.4 0.8+ 0.4- 381/ks 1985 11 10.96352 04 31 38.36 +24 12 43.1 0.5+ 2.0- 095/CR 1985 11 11.61174 04 31 20.47 +24 23 30.9 ( 0.7+ 4.0-) 397/wt 1985 11 11.66132 04 31 18.85 +24 24 24.6 0.6+ 0.0 397/wt 1985 11 11.67708 04 31 18.35 +24 24 43.5 0.3- 1.2+ 372/sk 1985 11 11.70313 04 31 17.42 +24 25 12.4 ( 0.2- 5.1+) 391/ko 1985 11 11.71887 04 31 16.90 +24 25 21.8 0.4- 0.2- 392/kd - continued - P/Ciffreo NK 524 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1985 11 11.73854 04 31 16.49 +24 25 44.4 2.2+ 0.8+ 372/sk 1985 11 11.73958 04 31 16.16 +24 25 43.1 1.1- 0.3- 391/ko 1985 11 12.07500 04 31 05.81 +24 31 12.2 ( 8.5- 3.4-) 102/ZV 1985 11 12.50937 04 30 54.50 +24 38 32.1 1.4+ 1.2- 372/sk 1985 11 12.66042 04 30 49.03 +24 41 06.9 1.5- 1.5+ 391/ko 1985 11 12.71250 04 30 47.19 +24 41 57.2 1.8- 0.0 391/ko 1985 11 12.87895 04 30 42.78 +24 44 41.6 1.3+ 0.6- 095/CR 1985 11 12.95418 04 30 40.14 +24 45 57.9 1.2+ 0.2+ 095/CR 1985 11 12.98507 04 30 39.24 +24 46 27.5 1.1- 0.7+ 494/mn 1985 11 12.98924 04 30 38.85 +24 46 33.5 ( 4.2- 2.8+) 978/gw 1985 11 13.39521 04 30 26.17 +24 53 15.9 1.3+ 1.4- 657/VC 1985 11 13.58814 04 30 20.36 +24 56 29.3 ( 3.2+ 1.2-) 392/kd 1985 11 13.62980 04 30 18.55 +24 57 10.0 0.8- 2.3- 392/kd 1985 11 13.67292 04 30 16.92 +24 57 55.4 1.6- 0.8- 391/ko 1985 11 13.72292 04 30 15.08 +24 58 44.8 1.6- 0.9- 391/ko 1985 11 14.25939 04 29 57.57 +25 07 39.8 0.7- 0.3+ 801/HO 1985 11 14.34757 04 29 54.83 +25 09 06.4 0.3- 0.4+ 657/VC 1985 11 15.01771 04 29 31.82 +25 20 13.5 2.0+ 0.7+ 010/IC 1985 11 15.02743 04 29 30.83 +25 20 25.3 ( 2.5- 3.5+) 094/CR 1985 11 15.12847 04 29 27.52 +25 22 02.5 1.4+ 1.9+ 090/MZ 1985 11 15.13508 04 29 27.06 +25 22 07.7 1.4- 0.6+ 090/MZ 1985 11 15.61736 04 29 10.82 +25 30 21.5 0.2+ 1.6+ 323/PR 1985 11 16.11046 04 28 52.87 +25 38 15.4 0.3- 2.0+ 801/HO 1985 11 16.35922 04 28 42.70 +25 42 20.8 0.9- 2.0+ 801/HO 1985 11 17.36552 04 28 05.16 +25 58 49.1 1.5+ 1.1+ 657/VC 1985 11 19.69358 04 26 31.29 +26 36 48.4 1.7+ 2.0+ 323/PR 1985 11 20.35458 04 26 03.20 +26 47 08.7 0.4+ 1.5- 675/PL 1985 11 20.36042 04 26 02.96 +26 47 14.2 0.8+ 1.6- 675/PL 1985 11 22.03611 04 24 50.01 +27 13 45.7 ( 4.9+ 0.6-) 094/CR 1985 11 22.48333 04 24 29.52 +27 20 47.2 0.1- 0.4+ 707/ev 1985 12 02.83368 04 16 24.00 +29 51 40.5 0.1- 0.7- 046/KL 1985 12 02.83738 04 16 23.77 +29 51 43.4 0.6- 0.8- 046/KL 1985 12 04.75625 04 14 54.72 +30 16 50.3 2.2- 1.4+ 046/KL 1985 12 04.76667 04 14 54.39 +30 16 56.9 0.0 0.3- 046/KL 1985 12 05.77708 04 14 08.40 +30 29 45.4 0.6- 0.5- 046/KL 1985 12 05.78160 04 14 08.21 +30 29 48.1 0.3- 1.3- 046/KL 1985 12 07.23668 04 13 03.36 +30 47 49.9 0.1- 0.6- 691/ST 1985 12 07.28889 04 13 00.95 +30 48 28.3 2.2+ 1.3+ 707/ev 1985 12 09.26361 04 11 36.99 +31 11 45.5 1.5- 1.0- 657/VC 1985 12 09.79653 04 11 15.58 +31 17 52.2 0.6+ 0.0 046/KL 1985 12 09.80926 04 11 15.02 +31 18 00.4 0.5+ 0.7- 046/KL 1985 12 09.89940 04 11 11.32 +31 19 05.4 1.1+ 0.7+ 491/CN 1985 12 12.15285 04 09 43.89 +31 43 54.6 0.2- 0.3- 657/VC 1985 12 12.85066 04 09 18.41 +31 51 22.2 0.3+ 0.7+ 491/CN 1985 12 13.26386 04 09 02.88 +31 55 41.7 0.5+ 1.3+ 801/HO - continued - P/Ciffreo NK 524 - 3 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1985 12 14.32538 04 08 26.43 +32 06 35.2 2.0- 1.1- 691/ST 1985 12 15.29931 04 07 54.94 +32 16 15.2 1.2+ 1.1- 293/h3 1985 12 15.32083 04 07 54.08 +32 16 26.6 0.5- 1.9- 293/h3 1985 12 16.32639 04 07 23.76 +32 26 16.3 2.1- 0.1+ 662/LI 1985 12 17.34167 04 06 54.83 +32 35 51.7 ( 3.1- 1.6+) 662/LI 1985 12 18.35851 04 06 28.16 +32 45 07.9 1.0- 0.9- 691/ST 1985 12 18.37160 04 06 27.79 +32 45 15.5 1.0- 0.1- 691/ST 1985 12 18.38397 04 06 27.46 +32 45 21.4 0.8- 0.6- 691/ST 1985 12 22.02795 04 05 11.25 +33 16 27.5 0.1- 0.3- 094/CR 1986 01 03.80139 04 05 02.07 +34 42 05.4 0.9- 0.9+ 046/KL 1986 01 03.81551 04 05 02.50 +34 42 12.1 ( 2.2+ 2.9+) 046/KL 1986 01 05.77188 04 05 37.90 +34 52 30.1 1.4+ 0.2- 046/KL 1986 01 05.78721 04 05 38.20 +34 52 34.1 1.8+ 1.0- 046/KL 1986 01 09.13990 04 07 01.32 +35 09 03.6 ( 3.0+ 7.1+) 801/HO 1986 01 10.16076 04 07 32.36 +35 13 36.8 1.7- 0.3+ 662/LI 1986 01 10.85045 04 07 55.09 +35 16 42.3 ( 2.8+ 2.4+) 491/CN 1986 01 12.10114 04 08 38.26 +35 22 04.2 1.2- 1.2+ 801/HO 1986 01 12.23231 04 08 43.00 +35 22 38.4 0.9- 0.8+ 691/ST 1986 01 12.24745 04 08 43.51 +35 22 41.6 0.8- 0.3+ 691/ST 1986 01 13.92191 04 09 48.95 +35 29 33.6 2.2+ 0.7+ 491/CN 1986 01 14.88938 04 10 29.75 +35 33 22.1 2.5+ 0.1- 491/CN 1986 01 20.24117 04 14 53.35 +35 52 35.9 0.7- 0.9- 691/ST 1986 01 20.26005 04 14 54.59 +35 52 41.5 2.3+ 1.2+ 691/ST 1986 01 20.27380 04 14 55.43 +35 52 43.6 ( 3.7+ 0.8+) 691/ST 1986 01 30.16291 04 25 41.55 +36 20 44.1 0.9+ 0.1- 707/ev 1986 02 04.04959 04 32 06.57 +36 31 24.2 ( 2.6+ 3.3+) 801/HO 1986 02 09.10277 04 39 24.10 +36 40 19.0 ( 3.0+ 5.7+) 801/HO 1986 03 01.21181 05 13 36.60 +36 54 55.5 ( 4.1- 0.3+) 707/ev 1986 03 06.30411 05 23 14.46 +36 53 13.3 1.0+ 1.2+ 695/KP 1986 03 06.30727 05 23 15.09 +36 53 12.7 ( 4.2+ 0.8+) 695/KP 1986 03 15.11698 05 40 31.13 +36 44 47.8 ( 2.3- 5.2-) 691/ST 1986 03 15.13355 05 40 33.23 +36 44 50.8 0.5- 0.8- 691/ST 1986 03 15.14477 05 40 34.50 +36 44 51.1 1.1- 0.5+ 691/ST ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1988 November 1