117P/Helin-Roman-Alu
From 4119 observations 1988 Aug. 12-2018 Mar. 10. Kinoshita
Epoch = 2020 Feb. 1.0 TT = JDT 2458880.5
T = 2022 July 6.59483 TT peri.= 222.65691
e = 0.2556929 node = 58.86222 (2000.0)
q = 3.0427560 AU incl.= 8.70110
a = 4.0880385 AU n = 0.11924265 P = 8.27 years
m1 = 5.0 + 5log(delta) + 15.0log(r)
A. Node = E:11/22.1 JST O:2025/02/20.3 JST 4.706 AU
D. Node = E:05/20.1 JST O:2021/12/06.1 JST 3.216 AU
2020 JST R.A. (2000) D.C. Delta r Elong. Phase dMo./P.A. Tail/P.A. M-O Ag m1 H/A
01/12 01:50 10 54.43 +18 08.4 3.907 4.622 131.9 9.1 4.4/318.1 0.2/283 36 16 17.9 +62/301
01/13 01:50 10 54.23 +18 11.6 3.894 4.621 132.9 9.0 4.6/316.6 0.2/283 22 17 17.9 +63/302
01/14 01:50 10 54.00 +18 15.0 3.881 4.619 134.0 8.8 4.8/315.3 0.2/283 9 18 17.9 +64/303
01/15 01:50 10 53.77 +18 18.4 3.869 4.617 135.0 8.7 5.0/314.1 0.2/282 10 19 17.9 +64/305
01/16 01:40 10 53.52 +18 21.8 3.856 4.616 136.1 8.5 5.2/313.0 0.2/282 23 20 17.9 +63/303
01/17 01:40 10 53.25 +18 25.3 3.844 4.614 137.1 8.3 5.4/311.9 0.2/281 37 21 17.9 +64/304
01/18 01:40 10 52.97 +18 28.9 3.832 4.612 138.2 8.2 5.5/310.9 0.2/281 51 22 17.9 +65/306
01/19 01:40 10 52.68 +18 32.5 3.820 4.611 139.2 8.0 5.7/310.0 0.2/280 65 23 17.9 +66/307
01/20 01:40 10 52.37 +18 36.2 3.809 4.609 140.3 7.8 5.9/309.1 0.2/280 79 24 17.9 +66/309
01/21 01:30 10 52.05 +18 39.9 3.798 4.607 141.4 7.7 6.1/308.3 0.2/279 92 25 17.8 +65/306
01/22 01:30 10 51.71 +18 43.7 3.786 4.606 142.4 7.5 6.3/307.5 0.2/279 106 26 17.8 +66/308
01/23 01:30 10 51.36 +18 47.5 3.776 4.604 143.5 7.3 6.5/306.8 0.2/278 119 27 17.8 +67/310
01/24 01:30 10 51.00 +18 51.4 3.765 4.602 144.5 7.1 6.6/306.0 0.2/277 132 28 17.8 +68/312
01/25 01:20 10 50.62 +18 55.3 3.755 4.601 145.6 6.9 6.8/305.4 0.2/277 144 29 17.8 +67/309
01/26 01:20 10 50.23 +18 59.2 3.745 4.599 146.7 6.8 7.0/304.7 0.2/276 156 1 17.8 +68/311
01/27 01:20 10 49.82 +19 03.2 3.735 4.597 147.7 6.6 7.2/304.1 0.2/275 168 2 17.8 +68/313
01/28 01:20 10 49.40 +19 07.2 3.725 4.596 148.8 6.4 7.3/303.5 0.2/274 173 3 17.8 +69/315
01/29 01:10 10 48.98 +19 11.2 3.716 4.594 149.8 6.2 7.5/302.9 0.2/274 165 3 17.8 +68/312
01/30 01:10 10 48.53 +19 15.3 3.707 4.592 150.9 6.0 7.6/302.4 0.2/273 154 4 17.8 +69/314
01/31 01:10 10 48.08 +19 19.4 3.698 4.590 151.9 5.8 7.8/301.8 0.2/272 142 5 17.8 +70/316
02/01 01:10 10 47.61 +19 23.5 3.689 4.589 152.9 5.6 7.9/301.3 0.1/271 130 6 17.8 +70/318
02/02 01:00 10 47.14 +19 27.6 3.681 4.587 154.0 5.4 8.1/300.8 0.1/269 118 7 17.8 +69/315
02/03 01:00 10 46.65 +19 31.7 3.673 4.585 155.0 5.2 8.2/300.3 0.1/268 106 8 17.7 +70/318
02/04 01:00 10 46.15 +19 35.9 3.666 4.584 156.0 5.0 8.3/299.9 0.1/267 94 9 17.7 +71/320
02/05 00:50 10 45.64 +19 40.0 3.658 4.582 157.0 4.8 8.4/299.4 0.1/266 81 10 17.7 +70/317
02/06 00:50 10 45.12 +19 44.1 3.651 4.580 158.0 4.6 8.6/299.0 0.1/264 68 11 17.7 +71/319
02/07 00:50 10 44.58 +19 48.3 3.644 4.579 159.0 4.4 8.7/298.5 0.1/262 54 12 17.7 +71/322
02/08 00:50 10 44.04 +19 52.4 3.638 4.577 160.0 4.2 8.8/298.1 0.1/260 40 13 17.7 +72/324
02/09 00:40 10 43.50 +19 56.5 3.632 4.575 160.9 4.0 8.9/297.6 0.1/258 26 14 17.7 +71/321
02/10 00:40 10 42.94 +20 00.6 3.626 4.573 161.8 3.9 9.0/297.2 0.1/256 12 15 17.7 +72/324
02/11 00:40 10 42.37 +20 04.7 3.620 4.572 162.7 3.7 9.1/296.8 0.1/254 9 16 17.7 +73/326
02/12 00:40 10 41.80 +20 08.8 3.615 4.570 163.6 3.5 9.2/296.4 0.1/251 21 17 17.7 +73/330
