OAA computing section circular NK 700o 26P/Grigg-Skjellerup
The following improved orbital elements, by S. Nakano, are from 83 observations 1922-1952, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 1.55 arc seconds. Epoch = 1922 May 26.0 TT T = 1922 May 15.69453 +/- 0.00007 (m.e.) TT Peri. = 354.99000 +/- 0.00016 Node = 216.58724 +/- 0.00013 (2000.0) Inc. = 17.50576 +/- 0.00005 q = 0.8889373 +/- 0.0000003 AU e = 0.6951365 +/- 0.0000002 a = 2.9158534 +/- 0.0000006 AU n' = 0.19795002 +/- 0.00000006 P = 4.979 +/- 0.0000016 years A1 = -0.007 +/- 0.005 A2 = -0.00170 +/- 0.00002 [ T = 1808 Mar. 17.05376 TT Epoch = 1808 Mar. 4.0 TT Peri. = 194.01011 e = 0.7435154 Node = 18.10961 (2000.0) a = 2.8554283 AU Inc. = 3.46537 n'= 0.20426652 q = 0.7323734 AU P = 4.825 years ] [ T = 1902 July 3.50529 TT Epoch = 1902 June 20.0 TT Peri. = 350.69928 e = 0.7362933 Node = 221.99649 (2000.0) a = 2.8558915 AU Inc. = 8.29294 n'= 0.20421683 q = 0.7531177 AU P = 4.826 years ] T = 1922 May 15.69453 TT Epoch = 1922 May 26.0 TT Peri. = 354.99000 e = 0.6951365 Node = 216.58724 (2000.0) a = 2.9158534 AU Inc. = 17.50576 n'= 0.19795002 q = 0.8889373 AU P = 4.979 years T = 1927 May 10.24956 TT Epoch = 1927 Apr. 30.0 TT Peri. = 355.01529 e = 0.6942335 Node = 216.57089 (2000.0) a = 2.9195618 AU Inc. = 17.48121 n'= 0.19757298 q = 0.8927041 AU P = 4.989 years T = 1932 May 12.60894 TT Epoch = 1932 May 13.0 TT Peri. = 355.21953 e = 0.6905645 Node = 216.47833 (2000.0) a = 2.9330864 AU Inc. = 17.45937 n'= 0.19620804 q = 0.9076011 AU P = 5.023 years T = 1937 May 23.06047 TT Epoch = 1937 May 27.0 TT Peri. = 355.30199 e = 0.6905243 Node = 216.44109 (2000.0) a = 2.9335939 AU Inc. = 17.46110 n'= 0.19615713 q = 0.9078759 AU P = 5.025 years T = 1942 May 23.37973 TT Epoch = 1942 June 10.0 TT Peri. = 356.34897 e = 0.7034675 Node = 216.11644 (2000.0) a = 2.8866995 AU Inc. = 17.61697 n'= 0.20095634 q = 0.8560002 AU P = 4.905 years T = 1947 Apr. 18.13728 Epoch = 1947 Apr. 5.0 TT Peri. = 356.38224 e = 0.7042750 Node = 216.08953 (2000.0) a = 2.8848778 AU Inc. = 17.64112 n'= 0.20114672 q = 0.8531305 P = 4.900 years T = 1952 Mar. 11.16066 TT Epoch = 1952 Mar. 9.0 TT Peri. = 356.34679 e = 0.7035987 Node = 216.09421 (2000.0) a = 2.8866743 AU Inc. = 17.62219 n'= 0.20095897 q = 0.8556141 AU P = 4.905 years The following residuals in seconds of arc are from the above orbital elements: 19/ 19/ 19/ 220523 016 1.7+ 2.7+ 270429 066 (2.6- 6.7+) 370506 754 1.2+ 0.7+ 220524 786 2.6- 0.1+ 270503 536 1.5- 2.8+ 370508 754 (3.6+ 1.4+) 220527 066 0.9- 0.4- 270520 754 0.5- 0.4+ 370530 754 0.3- 0.7+ 220528 754 2.4- 0.6- 270526 066 1.0+ 2.6- 370602 066 (2.9+ 4.4+) 220528 016 1.8- 2.9+ 270528 066 (2.1+ 5.7+) 370701 754 3.4+ 0.4+ 220528 024 0.8- 0.5- 270530 066 (0.1- 5.8-) 420411 754 0.8+ 1.6- 220529 016 1.4- 0.9- 270531 066 (0.3- 8.0-) 420418 754 3.2+ 3.0- 220601 786 0.6+ 2.1+ 270601 192 1.7- 0.1+ 420419 754 1.8+ 1.3- 220613 027 1.2- 0.3+ 270601 066 (1.7- 4.8-) 420509 754 0.7- 0.9- 220614 027 1.3+ 0.7+ 270606 020 0.4- 3.3+ 420509 754 0.2+ 0.0 220614 008 1.2+ 1.8- 270608 754 0.8- 0.7+ 420509 388 0.2- 0.3+ 220616 020 1.0- 0.5+ 270622 754 0.4- 2.2+ 420519 754 1.2+ 1.3+ 220620 008 1.2+ 0.7+ 270628 754 0.3- 1.6+ 420614 754 0.2+ 1.3+ 220621 020 0.5+ 2.2+ 270629 754 2.0+ 1.7- 420615 754 0.5- 0.2+ 220621 499 0.9+ 2.2- 270702 754 2.4+ 1.8+ 420615 754 0.5- 2.5- 220622 786 0.1+ 1.6+ 270705 500 (3.3- 4.1-) 420617 754 0.1+ 1.4+ 220622 008 1.7+ 1.6- 270710 754 0.1- 2.2+ 420703 754 1.4- 0.8- 220623 754 2.5- 0.5- 270720 754 0.0 1.1+ 420707 754 0.1- 1.2- 220623 754 1.4- 2.6- 320428 754 2.5+ 0.7- 470312 690 (4.1+ 10.0-) 220623 020 1.1- 3.1- 320502 754 1.9- 1.0- 470313 690 (3.8+ 8.7-) 220623 008 1.5+ 0.2- 320503 754 2.9- 1.2+ 470314 690 (0.5- 9.3-) 220625 754 1.0- 0.8- 320509 754 0.9+ 1.4+ 470315 754 (1.9- 7.2-) 220630 754 1.7- 2.5- 320522 754 1.4+ 1.3+ 470315 690 (1.5+ 8.0-) 220702 008 1.9+ 0.7- 320524 754 0.5+ 0.6+ 470316 690 (0.4+ 10.6-) 220702 754 0.9- 0.7- 320524 066 (4.3- 3.2-) 470502 690 1.1- 1.8+ 220703 499 1.6+ 1.8+ 320530 066 (0.5+ 6.7-) 470525 008 1.9- 1.5+ 220714 754 0.9- 0.5- 320531 066 2.0+ 1.8- 470530 690 0.6- 1.0+ 220719 754 0.5- 1.5- 320531 066 (1.4- 10.1-) 470614 662 1.0+ 1.1+ 220719 754 0.7+ 1.6- 320601 066 (4.1- 10.5+) 470614 662 1.1+ 1.0+ 220724 754 1.6+ 2.3- 320601 029 (0.2+ 4.2+) 470615 690 1.4- 0.5- 220731 499 0.0 0.1- 320602 066 1.0+ 2.7- 470616 690 1.5+ 1.7+ 220813 754 1.8- 2.4+ 320606 066 2.4- 2.5- 520309 081 1.8+ 3.2+ 220814 754 2.7- 0.2+ 320607 066 (3.6+ 2.9-) 520325 081 (1.3+ 4.9+) 270331 754 0.8+ 1.9- 320608 066 (3.8- 9.2-) 520421 711 0.5+ 0.6+ 270427 754 0.1- 3.1- 320709 754 2.5+ 1.5- 270428 066 (7.1- 10.3+) 370430 801 1.9+ 1.6+ ( ) -------- Rejected Obs.
Director, Computing Section Computed date Syuichi Nakano 1997 Dec. 12