Коррекция орбиты некоторых периодических комет от 21 ноября (1)

[Gremlin]

Коррекция орбиты некоторых периодических комет от 21 ноября 2025 года, MPEC 2025-W75

Orbital elements:
1P/Halley
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2061 Aug. 14.05937 TT Pike
q 0.5725077 (2000.0) P Q
n 0.01306016 Peri. 112.41956 +0.56491549 -0.78175678
a 17.8581759 Node 59.52133 -0.82372707 -0.51550895
e 0.9679414 Incl. 162.15777 -0.04841689 -0.35086588
P 75.5
From 7808 observations 1835 Aug. 21-2003 Mar. 8, mean residual 0".9.
Nongravitational parameters A1 = +0.08, A2 = +0.0088.

2P/Encke
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2027 Feb. 10.23977 TT Pike
q 0.3388872 (2000.0) P Q
n 0.29836571 Peri. 187.27950 -0.94610535 -0.31217824
a 2.2180438 Node 334.01694 +0.30616951 -0.77541154
e 0.8472135 Incl. 11.34655 +0.10556940 -0.54889132
P 3.30
From 3387 observations 2009 Aug. 15-2025 Oct. 25, mean residual 0".8.
Nongravitational parameters A1 = +0.01, A2 = -0.0001.

3I/ATLAS
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Oct. 29.48356 TT Pike
q 1.3563936 (2000.0) P Q
z -3.7887283 Peri. 128.00927 -0.96791853 -0.24576796
+/-0.0002208 Node 322.15532 -0.24885242 +0.90890569
e 6.1390069 Incl. 175.11296 -0.03473034 +0.33688063
From 4349 observations 2025 May 8-Nov. 21, mean residual 0".4.

4P/Faye
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2029 Mar. 9.09684 TT Pike
q 1.6236216 (2000.0) P Q
n 0.13147253 Peri. 207.15521 +0.76639251 -0.64162029
a 3.8304168 Node 192.90215 +0.61174561 +0.74375885
e 0.5761240 Incl. 8.00095 +0.19598423 +0.18747311
P 7.50
From 6600 observations 1998 May 24-2023 Mar. 25, mean residual 0".9.
Nongravitational parameters A1 = +0.50, A2 = -0.0297.

6P/d'Arrest
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Apr. 1.33763 TT Pike
q 1.3569359 (2000.0) P Q
n 0.15067033 Peri. 178.03812 +0.73252358 +0.64447559
a 3.4977135 Node 138.95181 -0.62902630 +0.76393647
e 0.6120506 Incl. 19.50167 -0.26025971 -0.03243898
P 6.54
From 2449 observations 1987 Mar. 31-2022 Mar. 1, mean residual 1".0.
Nongravitational parameters A1 = +0.58, A2 = +0.0990.

7P/Pons-Winnecke
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2027 Aug. 24.90612 TT Pike
q 1.1453349 (2000.0) P Q
n 0.16025547 Peri. 173.52342 -0.05118902 +0.92434910
a 3.3568155 Node 93.06114 -0.93242977 +0.09136860
e 0.6588031 Incl. 22.24939 -0.35770717 -0.37044639
P 6.15
From 1566 observations 2002 Jan. 11-2022 Dec. 16, mean residual 0".6.
Nongravitational parameters A1 = +0.00, A2 = +0.0026.

8P/Tuttle
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2021 Aug. 28.85639 TT Pike
q 1.0230317 (2000.0) P Q
n 0.07231110 Peri. 207.46709 -0.26758499 -0.50743170
a 5.7060128 Node 270.19334 +0.96351585 -0.13566162
e 0.8207099 Incl. 54.99445 +0.00595688 -0.85094594
P 13.6
From 312 observations 2008 Feb. 12-2022 Mar. 20, mean residual 0".6.
Nongravitational parameters A1 = -0.04, A2 = +0.0340.

9P/Tempel
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Feb. 9.27873 TT Pike
q 1.7507010 (2000.0) P Q
n 0.16466942 Peri. 184.49183 -0.31619924 +0.93352241
a 3.2965582 Node 67.14883 -0.86459641 -0.21024493
e 0.4689307 Incl. 10.56615 -0.39050109 -0.29040141
P 5.99
From 924 observations 2018 Oct. 16-2025 Sept. 20, mean residual 0".4.
Nongravitational parameters A1 = -0.04, A2 = +0.0101.

10P/Tempel
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Aug. 2.13327 TT Pike
q 1.4176106 (2000.0) P Q
n 0.18373648 Peri. 195.48080 +0.68036880 +0.70931046
a 3.0643553 Node 117.79821 -0.64833197 +0.69980983
e 0.5373870 Incl. 12.02720 -0.34170741 +0.08452733
P 5.36
From 4653 observations 2003 Mar. 7-2025 May 17, mean residual 0".6.
Nongravitational parameters A1 = +0.02, A2 = +0.0006.

11P/Tempel-Swift-LINEAR
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Nov. 9.91114 TT Pike
q 1.3873816 (2000.0) P Q
n 0.16570009 Peri. 168.05892 +0.67745095 -0.70395941
a 3.2828741 Node 238.85951 +0.65269840 +0.70901869
e 0.5773881 Incl. 14.43154 +0.33918286 +0.04163714
P 5.95
From 1180 observations 2014 July 27-2024 Aug. 25, mean residual 0".5.
Nongravitational parameters A1 = +0.21, A2 = -0.0291.

12P/Pons-Brooks
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 Apr. 21.16286 TT Pike
q 0.7813624 (2000.0) P Q
n 0.01375511 Peri. 199.01821 +0.14484906 -0.32948855
a 17.2514943 Node 255.85879 +0.98574050 +0.12966794
e 0.9547076 Incl. 74.18327 +0.08564126 -0.93521309
P 71.7
From 4400 observations 2023 Oct. 1-2025 June 7, mean residual 0".6.
Nongravitational parameters A1 = +0.60, A2 = -0.2270.

13P/Olbers
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 June 30.11825 TT Pike
q 1.1753405 (2000.0) P Q
n 0.01415409 Peri. 64.42457 -0.60859583 -0.37157233
a 16.9257540 Node 85.84616 +0.18545182 -0.92571640
e 0.9305590 Incl. 44.66411 +0.77150421 -0.07059142
P 69.6
From 2247 observations 2023 Oct. 8-2025 July 31, mean residual 0".5.
Nongravitational parameters A1 = +0.73, A2 = -0.0582.

14P/Wolf
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Sept. 19.04293 TT Pike
q 2.7384236 (2000.0) P Q
n 0.11225429 Peri. 159.20428 +0.98428398 +0.01948116
a 4.2559915 Node 202.01641 -0.01143211 +0.99884098
e 0.3565721 Incl. 27.91750 +0.17622243 -0.04401337
P 8.78
From 396 observations 1992 July 27-2025 Aug. 27, mean residual 0".4.

15P/Finlay
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Feb. 9.86002 TT Pike
q 0.9973921 (2000.0) P Q
n 0.14979288 Peri. 347.87329 +0.99925722 -0.02641925
a 3.5113592 Node 13.73381 +0.03691736 +0.86506098
e 0.7159527 Incl. 6.78632 -0.01105084 +0.50097059
P 6.58
From 1653 observations 2008 Apr. 27-2022 Mar. 3, mean residual 0".9.
Nongravitational parameters A1 = +0.21, A2 = -0.0233.

16P/Brooks
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Apr. 21.12583 TT Pike
q 1.8846251 (2000.0) P Q
n 0.14061617 Peri. 245.37905 +0.91132886 -0.41022466
a 3.6625133 Node 138.81613 +0.39414805 +0.84519019
e 0.4854285 Incl. 3.00985 +0.11885715 +0.34259198
P 7.01
From 336 observations 2007 Aug. 31-2022 Jan. 29, mean residual 0".8.
Nongravitational parameters A1 = +0.96, A2 = -0.1998.

17P/Holmes
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Jan. 31.78933 TT Pike
q 2.0900068 (2000.0) P Q
n 0.14179741 Peri. 24.60261 +0.97574835 +0.12562851
a 3.6421446 Node 326.60180 -0.21160349 +0.75095339
e 0.4261604 Incl. 19.00499 +0.05602780 +0.64829505
P 6.95
From 2215 observations 2011 Jan. 4-2023 Jan. 22, mean residual 0".6.

19P/Borrelly
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Dec. 11.28973 TT Pike
q 1.3074566 (2000.0) P Q
n 0.14377879 Peri. 352.01436 +0.38594901 -0.79315542
a 3.6086063 Node 74.21565 +0.87114662 +0.14530803
e 0.6376838 Incl. 29.31259 +0.30355712 +0.59143052
P 6.86
From 2437 observations 2015 Jan. 11-2024 May 2, mean residual 0".6.
Nongravitational parameters A1 = +0.37, A2 = -0.0752.

21P/Giacobini-Zinner
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Mar. 25.35973 TT Pike
q 1.0087829 (2000.0) P Q
n 0.15106414 Peri. 172.93990 +0.98469461 -0.10360080
a 3.4916319 Node 195.31359 +0.12234050 +0.98360881
e 0.7110856 Incl. 32.05176 +0.12413432 -0.14758243
P 6.52
From 4322 observations 2011 May 1-2024 Oct. 21, mean residual 0".9.
Nongravitational parameters A1 = +0.38, A2 = -0.1572.

22P/Kopff
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 July 2.44228 TT Pike
q 1.4679305 (2000.0) P Q
n 0.15765884 Peri. 163.26381 +0.23009431 +0.97032425
a 3.3935727 Node 119.98462 -0.90240852 +0.24133921
e 0.5674380 Incl. 4.92405 -0.36430135 +0.01504120
P 6.25
From 4881 observations 2008 Jan. 30-2025 Oct. 1, mean residual 0".7.
Nongravitational parameters A1 = +0.05, A2 = -0.0395.

23P/Brorsen-Metcalf
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2059 June 20.55700 TT Pike
q 0.4649624 (2000.0) P Q
n 0.01412960 Peri. 130.07890 +0.12064026 -0.96030267
a 16.9453077 Node 311.07988 +0.77858266 +0.24871777
e 0.9725610 Incl. 19.49219 +0.61583680 -0.12632597
P 69.8
From 190 observations 1919 Aug. 26-1989 Sept. 15, mean residual 1".0.
Nongravitational parameters A1 = +0.32, A2 = -0.0149.

24P/Schaumasse
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Jan. 8.34262 TT Pike
q 1.1839376 (2000.0) P Q
n 0.12054344 Peri. 58.48298 -0.71166857 -0.67483959
a 4.0585759 Node 78.27208 +0.55777345 -0.71174455
e 0.7082874 Incl. 11.50215 +0.42710259 -0.19496466
P 8.18
From 941 observations 2000 Oct. 7-2025 Nov. 21, mean residual 0".8.
Nongravitational parameters A1 = +0.07, A2 = -0.0194.

26P/Grigg-Skjellerup
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2023 Dec. 25.32521 TT Pike
q 1.0829761 (2000.0) P Q
n 0.18834417 Peri. 2.11515 -0.83396411 +0.51444730
a 3.0141713 Node 211.52818 -0.51172308 -0.85636601
e 0.6407052 Incl. 22.44157 -0.20650265 +0.04451113
P 5.23
From 263 observations 2013 Jan. 3-2024 Oct. 7, mean residual 0".7.
Nongravitational parameters A1 = +0.01, A2 = -0.0002.

27P/Crommelin
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2039 May 13.66233 TT Pike
q 0.7375461 (2000.0) P Q
n 0.03548860 Peri. 195.85494 +0.09343048 -0.88109531
a 9.1708615 Node 250.69518 +0.95851657 +0.20554789
e 0.9195772 Incl. 29.42205 +0.26928931 -0.42593558
P 27.8
From 151 observations 2011 May 12-2012 Jan. 26, mean residual 0".8.
Nongravitational parameters A1 = +4.42, A2 = +0.4610.

28P/Neujmin
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2021 Mar. 9.64397 TT Pike
q 1.5876881 (2000.0) P Q
n 0.05345537 Peri. 347.43360 +0.89925651 +0.43356594
a 6.9792460 Node 346.42066 -0.37692993 +0.70084405
e 0.7725130 Incl. 14.28932 -0.22194945 +0.56642580
P 18.4
From 981 observations 2017 Mar. 19-2024 Apr. 8, mean residual 0".3.

29P/Schwassmann-Wachmann
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2019 Apr. 28.42645 TT Pike
q 5.7969125 (2000.0) P Q
n 0.06610616 Peri. 51.91922 +0.98942654 -0.08140293
a 6.0577049 Node 312.40184 +0.01175355 +0.86991793
e 0.0430514 Incl. 9.35523 +0.14455783 +0.48643227
P 14.9
From 16989 observations 2020 Jan. 1-2025 Nov. 21, mean residual 0".6.
Nongravitational parameters A1 = -1.55, A2 = +2.1866.

30P/Reinmuth
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 Aug. 17.27466 TT Pike
q 1.8141249 (2000.0) P Q
n 0.13647703 Peri. 9.53506 -0.59707997 -0.79245012
a 3.7361962 Node 117.22981 +0.72644787 -0.60001794
e 0.5144460 Incl. 8.05355 +0.34024844 -0.10955036
P 7.22
From 1373 observations 2011 Apr. 12-2025 June 29, mean residual 0".8.

31P/Schwassmann-Wachmann
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Mar. 18.99860 TT Pike
q 3.4110766 (2000.0) P Q
n 0.11329196 Peri. 17.97405 -0.66937729 -0.73938616
a 4.2299638 Node 114.11346 +0.67151110 -0.64384609
e 0.1935920 Incl. 4.54975 +0.31781580 -0.19690181
P 8.70
From 1052 observations 2000 Nov. 24-2025 Oct. 19, mean residual 0".7.
Nongravitational parameters A1 = +0.07, A2 = -0.0057.

32P/Comas Sola
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 Apr. 20.73409 TT Pike
q 2.0256352 (2000.0) P Q
n 0.10137328 Peri. 54.72886 -0.31995007 -0.93698976
a 4.5553358 Node 54.53320 +0.80368364 -0.34682848
e 0.5553269 Incl. 9.91893 +0.50172159 -0.04195466
P 9.72
From 3704 observations 2013 Sept. 24-2025 June 4, mean residual 0".8.
Nongravitational parameters A1 = +1.14, A2 = -0.1587.

33P/Daniel
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 Nov. 10.86996 TT Pike
q 2.2426581 (2000.0) P Q
n 0.11909740 Peri. 20.25993 +0.08406496 -0.93397502
a 4.0913616 Node 66.27918 +0.85400150 -0.11206078
e 0.4518553 Incl. 22.29398 +0.51343405 +0.33931262
P 8.28
From 807 observations 1999 Nov. 13-2025 May 2, mean residual 0".8.
Nongravitational parameters A1 = +0.49, A2 = +0.0462.

36P/Whipple
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Nov. 5.27712 TT Pike
q 3.0321477 (2000.0) P Q
n 0.11692641 Peri. 201.20527 +0.92051868 -0.39066013
a 4.1418495 Node 181.81797 +0.37869515 +0.89559912
e 0.2679242 Incl. 9.94456 +0.09610065 +0.21280712
P 8.43
From 955 observations 1948 July 18-2022 Mar. 6, mean residual 0".6.
Nongravitational parameters A1 = +0.56, A2 = -0.0460.

37P/Forbes
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 Oct. 11.20158 TT Pike
q 1.6181630 (2000.0) P Q
n 0.15303128 Peri. 330.07088 +0.25667389 +0.96012044
a 3.4616453 Node 314.54553 -0.85301422 +0.17111853
e 0.5325451 Incl. 8.94776 -0.45440648 +0.22110449
P 6.44
From 1750 observations 2011 Feb. 8-2025 Nov. 11, mean residual 0".7.
Nongravitational parameters A1 = +0.55, A2 = -0.0498.

38P/Stephan-Oterma
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2018 Nov. 14.02119 TT Pike
q 1.5810950 (2000.0) P Q
n 0.02605219 Peri. 359.60885 +0.21654165 -0.92615720
a 11.2695492 Node 77.86511 +0.89656878 +0.06348652
e 0.8597020 Incl. 18.41111 +0.38636012 +0.37175570
P 37.8
From 3288 observations 1942 Nov. 6-2020 May 21, mean residual 0".5.
Nongravitational parameters A1 = -0.25, A2 = -0.0028.

39P/Oterma
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2023 Sept. 29.83609 TT Pike
q 5.7955363 (2000.0) P Q
n 0.05369634 Peri. 117.09591 +0.69189350 -0.72143196
a 6.9583496 Node 289.09327 +0.65123330 +0.64070466
e 0.1671105 Incl. 1.73574 +0.31173477 +0.26274219
P 18.4
From 34 observations 2019 July 3-2024 Jan. 5, mean residual 0".4.

40P/Vaisala
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Nov. 11.93891 TT Pike
q 1.8236058 (2000.0) P Q
n 0.08958069 Peri. 52.04992 -0.98724023 +0.02639504
a 4.9468239 Node 128.89841 -0.06913128 -0.95942820
e 0.6313582 Incl. 11.64090 +0.14344894 -0.28071485
P 11.0
From 46 observations 2024 Nov. 29-2025 Mar. 18, mean residual 0".5.

41P/Tuttle-Giacobini-Kresak
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Feb. 15.89462 TT Pike
q 1.0504841 (2000.0) P Q
n 0.18166549 Peri. 62.20640 -0.91206860 +0.39744244
a 3.0876004 Node 140.97554 -0.40938863 -0.86882064
e 0.6597733 Incl. 9.21648 -0.02306112 -0.29527988
P 5.43
From 4395 observations 2016 Nov. 10-2023 Sept. 13, mean residual 0".5.
Nongravitational parameters A1 = +0.66, A2 = -0.0135.

42P/Neujmin
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Jan. 14.94209 TT Pike
q 2.0296428 (2000.0) P Q
n 0.09142944 Peri. 147.12587 +0.45902052 +0.88775115
a 4.8799122 Node 150.15587 -0.82939578 +0.44216072
e 0.5840821 Incl. 3.98836 -0.31843806 +0.12803042
P 10.8
From 299 observations 1972 Apr. 17-2025 May 2, mean residual 0".7.
Nongravitational parameters A1 = +0.91, A2 = +0.1048.

43P/Wolf-Harrington
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Aug. 4.58302 TT Pike
q 2.4427824 (2000.0) P Q
n 0.10934202 Peri. 223.78783 -0.29693295 -0.94371916
a 4.3312307 Node 243.97992 +0.91465974 -0.23726788
e 0.4360073 Incl. 9.32999 +0.27427792 -0.23043025
P 9.01
From 1168 observations 2023 Sept. 11-2025 Nov. 21, mean residual 0".5.
Nongravitational parameters A1 = -2.27, A2 = +1.2353.

44P/Reinmuth
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2029 May 21.49521 TT Pike
q 2.1143053 (2000.0) P Q
n 0.13916873 Peri. 57.97627 +0.95884156 +0.26629850
a 3.6878644 Node 286.41961 -0.28259698 +0.86127295
e 0.4266857 Incl. 5.89572 -0.02760080 +0.43277479
P 7.08
From 1822 observations 2008 July 2-2024 Mar. 14, mean residual 0".6.
Nongravitational parameters A1 = +0.06, A2 = -0.0625.

45P/Honda-Mrkos-Pajdusakova
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2027 Aug. 31.67696 TT Pike
q 0.5577789 (2000.0) P Q
n 0.18440987 Peri. 327.97572 +0.56290375 -0.82308073
a 3.0568910 Node 87.66278 +0.77333826 +0.49231575
e 0.8175339 Incl. 4.32488 +0.29169729 +0.28313126
P 5.34
From 1874 observations 2016 Nov. 5-2022 July 4, mean residual 0".7.
Nongravitational parameters A1 = +0.26, A2 = +0.0563.

46P/Wirtanen
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 May 19.09130 TT Pike
q 1.0556200 (2000.0) P Q
n 0.18123081 Peri. 356.35402 +0.19775733 -0.95926953
a 3.0925355 Node 82.16297 +0.90443509 +0.09919872
e 0.6586555 Incl. 11.74928 +0.37800689 +0.26450252
P 5.44
From 6130 observations 2008 Jan. 1-2023 Dec. 10, mean residual 0".8.
Nongravitational parameters A1 = +0.38, A2 = -0.1547.

47P/Ashbrook-Jackson
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Oct. 28.00477 TT Pike
q 2.8074558 (2000.0) P Q
n 0.11800658 Peri. 357.91828 +0.99593413 +0.08924411
a 4.1165357 Node 356.88094 -0.07904811 +0.80041058
e 0.3180052 Incl. 13.03942 -0.04320434 +0.59277178
P 8.35
From 2025 observations 2012 Feb. 15-2025 Nov. 20, mean residual 0".7.
Nongravitational parameters A1 = -0.10, A2 = -0.0132.

48P/Johnson
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Mar. 2.66188 TT Pike
q 2.0067847 (2000.0) P Q
n 0.15057006 Peri. 216.78748 +0.82454545 +0.52982198
a 3.4992661 Node 110.06367 -0.45560548 +0.82980013
e 0.4265127 Incl. 12.20177 -0.33548241 +0.17527243
P 6.55
From 1334 observations 2018 Feb. 16-2025 Nov. 20, mean residual 0".7.
Nongravitational parameters A1 = +0.53, A2 = +0.0546.

49P/Arend-Rigaux
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 Apr. 10.59758 TT Pike
q 1.4313718 (2000.0) P Q
n 0.14617701 Peri. 332.92568 -0.05182093 -0.95677158
a 3.5690283 Node 118.79079 +0.96516639 -0.12157376
e 0.5989464 Incl. 19.05974 +0.25645357 +0.26421198
P 6.74
From 4371 observations 2004 June 24-2025 May 25, mean residual 0".6.
Nongravitational parameters A1 = -0.02, A2 = -0.0008.

50P/Arend
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 May 12.55837 TT Pike
q 1.9220542 (2000.0) P Q
n 0.11933432 Peri. 49.30584 +0.71032493 -0.70332874
a 4.0859445 Node 355.14446 +0.50565192 +0.53726522
e 0.5295937 Incl. 19.10073 +0.48964745 +0.46548336
P 8.26
From 1878 observations 1999 Aug. 3-2025 May 2, mean residual 0".7.
Nongravitational parameters A1 = +0.22, A2 = -0.0103.

51P/Harrington
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2022 Sept. 30.37968 TT Pike
q 1.6945618 (2000.0) P Q
n 0.13818131 Peri. 269.22267 +0.98783647 +0.12387689
a 3.7054121 Node 83.65794 -0.07564336 +0.91092481
e 0.5426793 Incl. 5.42635 -0.13585724 +0.39353591
P 7.13
From 547 observations 2008 July 28-2022 Nov. 21, mean residual 0".9.

52P/Harrington-Abell
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2029 May 9.59620 TT Pike
q 1.7718163 (2000.0) P Q
n 0.12987276 Peri. 139.63654 -0.44840984 -0.89106782
a 3.8618080 Node 336.74437 +0.76744282 -0.34355978
e 0.5411951 Incl. 10.24008 +0.45821407 -0.29658864
P 7.59
From 1601 observations 1983 Sept. 17-2022 May 26, mean residual 0".7.
Nongravitational parameters A1 = -0.15, A2 = +0.0084.

53P/Van Biesbroeck
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Dec. 25.60505 TT Pike
q 2.4486287 (2000.0) P Q
n 0.07767116 Peri. 134.32409 +0.23036749 +0.97128376
a 5.4403836 Node 148.85010 -0.92233402 +0.23742781
e 0.5499162 Incl. 6.60359 -0.31021087 +0.01535875
P 12.7
From 2931 observations 2001 Feb. 20-2018 Feb. 3, mean residual 0".6.
Nongravitational parameters A1 = -0.26, A2 = +0.2544.

54P/de Vico-Swift-NEAT
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2024 Sept. 4.57566 TT Pike
q 2.1704683 (2000.0) P Q
n 0.13330876 Peri. 2.30223 +0.99988128 -0.01517798
a 3.7951615 Node 358.55937 +0.01190160 +0.87024585
e 0.4280959 Incl. 6.06604 +0.00978680 +0.49238379
P 7.39
From 374 observations 1965 Aug. 4-2024 Nov. 26, mean residual 0".7.
Nongravitational parameters A1 = +0.65, A2 = +0.0682.

55P/Tempel-Tuttle
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2031 May 24.53441 TT Pike
q 0.9789309 (2000.0) P Q
n 0.02966362 Peri. 172.52849 +0.46074267 +0.85230134
a 10.3352256 Node 235.41291 +0.79795015 -0.27566067
e 0.9052821 Incl. 162.49816 +0.38857657 -0.44451503
P 33.2
From 411 observations 1865 Dec. 22-1998 July 5, mean residual 0".8.
Nongravitational parameters A1 = -0.01, A2 = +0.0091.

56P/Slaughter-Burnham
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2027 Dec. 19.60674 TT Pike
q 2.4898016 (2000.0) P Q
n 0.08651948 Peri. 44.23522 +0.86334236 -0.50342981
a 5.0628313 Node 345.87477 +0.41462637 +0.74680645
e 0.5082195 Incl. 8.15503 +0.28761945 +0.43455558
P 11.4
From 1991 observations 2004 July 15-2018 Jan. 23, mean residual 0".6.
Nongravitational parameters A1 = -3.83, A2 = +1.9620.

57P/du Toit-Neujmin-Delporte
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Mar. 4.17244 TT Pike
q 1.7140597 (2000.0) P Q
n 0.15446766 Peri. 115.08429 +0.55605978 +0.83110808
a 3.4401524 Node 188.71118 -0.77937538 +0.51825208
e 0.5017489 Incl. 2.85449 -0.28874130 +0.20167832
P 6.38
From 1150 observations 2015 Feb. 18-2023 Feb. 9, mean residual 0".9.

58P/Jackson-Neujmin
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Sept. 4.18437 TT Pike
q 1.3852169 (2000.0) P Q
n 0.11908857 Peri. 200.58102 +0.99671074 -0.00191261
a 4.0915639 Node 159.03018 +0.01761120 +0.98094225
e 0.6614456 Incl. 13.08449 -0.07910465 +0.19429010
P 8.28
From 134 observations 2020 Apr. 9-Nov. 23, mean residual 0".8.
Nongravitational parameters A1 = +1.25, A2 = -0.7615.

59P/Kearns-Kwee
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Mar. 15.57040 TT Pike
q 2.3420194 (2000.0) P Q
n 0.10399931 Peri. 127.69262 +0.15870507 -0.98007518
a 4.4783264 Node 312.72650 +0.84695353 +0.19731330
e 0.4770325 Incl. 9.35717 +0.50742725 -0.02280583
P 9.48
From 1344 observations 2008 July 9-2019 Apr. 8, mean residual 0".8.

60P/Tsuchinshan
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 July 20.60323 TT Pike
q 1.6457197 (2000.0) P Q
n 0.14865500 Peri. 216.91211 -0.56246392 -0.82446574
a 3.5292549 Node 267.39542 +0.77273030 -0.49733119
e 0.5336920 Incl. 3.57982 +0.29414662 -0.27003319
P 6.63
From 1432 observations 2005 Oct. 5-2025 Feb. 23, mean residual 0".7.

61P/Shajn-Schaldach
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2022 Oct. 23.15856 TT Pike
q 2.1302974 (2000.0) P Q
n 0.13898590 Peri. 221.71793 +0.90762417 -0.41866581
a 3.6910978 Node 162.95696 +0.40747748 +0.86114068
e 0.4228553 Incl. 5.99592 +0.10089835 +0.28836725
P 7.09
From 2503 observations 2000 Apr. 22-2024 Feb. 9, mean residual 1".1.
Nongravitational parameters A1 = +0.61, A2 = -0.2678.

62P/Tsuchinshan
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2023 Dec. 25.27265 TT Pike
q 1.2651661 (2000.0) P Q
n 0.15921435 Peri. 47.34310 -0.43612992 -0.89659085
a 3.3714333 Node 68.66315 +0.79958987 -0.42531633
e 0.6247394 Incl. 4.73644 +0.41285196 -0.12341342
P 6.19
From 2004 observations 2023 Aug. 29-2024 June 1, mean residual 0".5.
Nongravitational parameters A1 = +0.58, A2 = +0.4712.

63P/Wild
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 July 6.16675 TT Pike
q 1.9745639 (2000.0) P Q
n 0.07325195 Peri. 168.73529 -0.97281332 -0.23122033
a 5.6570489 Node 357.76502 +0.17769754 -0.70898408
e 0.6509551 Incl. 19.61603 +0.14851878 -0.66624225
P 13.5
From 1972 observations 1960 Apr. 16-2025 Oct. 24, mean residual 0".6.
Nongravitational parameters A1 = +0.43, A2 = -0.1100.

64P/Swift-Gehrels
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Mar. 31.21370 TT Pike
q 1.3878073 (2000.0) P Q
n 0.10491439 Peri. 97.34244 +0.78702802 -0.60193820
a 4.4522478 Node 299.76348 +0.48659487 +0.74033394
e 0.6882906 Incl. 8.95467 +0.37922596 +0.29929260
P 9.39
From 3455 observations 2000 Dec. 22-2019 May 4, mean residual 0".5.
Nongravitational parameters A1 = -0.03, A2 = +0.0501.

65P/Gunn
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2025 June 16.36387 TT Pike
q 2.9261767 (2000.0) P Q
n 0.12838160 Peri. 213.65297 +0.09176757 +0.98578296
a 3.8916538 Node 61.97254 -0.87485863 +0.14732465
e 0.2480891 Incl. 9.17499 -0.47560602 -0.08079236
P 7.68
From 3207 observations 2013 Jan. 1-2025 Nov. 15, mean residual 0".7.
Nongravitational parameters A1 = -0.20, A2 = -0.0220.

66P/du Toit
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2033 Apr. 25.29596 TT Pike
q 1.3056088 (2000.0) P Q
n 0.06589751 Peri. 257.35311 +0.14090275 +0.98284518
a 6.0704850 Node 21.85178 -0.73796114 +0.18439639
e 0.7849251 Incl. 18.64619 -0.65996952 +0.00364899
P 15.0
From 551 observations 1974 Mar. 22-2018 Nov. 10, mean residual 0".7.
Nongravitational parameters A1 = +0.08, A2 = -0.0089.

67P/Churyumov-Gerasimenko
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Apr. 9.30915 TT Pike
q 1.2114744 (2000.0) P Q
n 0.15322566 Peri. 22.22479 +0.52255918 -0.85166722
a 3.4587171 Node 36.30541 +0.77174966 +0.45257578
e 0.6497330 Incl. 3.86746 +0.36240085 +0.26426901
P 6.43
From 10435 observations 1995 July 3-2023 Apr. 26, mean residual 0".8.
Nongravitational parameters A1 = +0.08, A2 = +0.0111.

68P/Klemola
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2030 Nov. 27.00798 TT Pike
q 1.8087851 (2000.0) P Q
n 0.08911260 Peri. 153.20078 +0.85150793 +0.52408357
a 4.9641318 Node 175.09663 -0.50895880 +0.83366406
e 0.6356291 Incl. 11.09717 -0.12607610 +0.17418569
P 11.1
From 1950 observations 1965 Nov. 18-2021 Jan. 11, mean residual 0".6.
Nongravitational parameters A1 = +0.07, A2 = -0.0021.

69P/Taylor
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Nov. 12.41392 TT Pike
q 2.2707084 (2000.0) P Q
n 0.12898679 Peri. 343.52754 +0.00898168 -0.93169772
a 3.8794715 Node 104.80760 +0.95459080 -0.10015249
e 0.4146862 Incl. 22.06123 +0.29778470 +0.34915445
P 7.64
From 47 observations 2011 Oct. 28-2019 Mar. 6, mean residual 0".7.

70P/Kojima
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Nov. 20.88216 TT Pike
q 2.0031989 (2000.0) P Q
n 0.13989809 Peri. 1.80648 -0.51549154 -0.85099836
a 3.6750354 Node 119.23604 +0.78473641 -0.51587183
e 0.4549171 Incl. 6.60362 +0.34417617 -0.09837710
P 7.05
From 1956 observations 2000 Nov. 6-2022 June 16, mean residual 0".5.
Nongravitational parameters A1 = +0.01, A2 = -0.0015.

71P/Clark
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2028 Sept. 22.59984 TT Pike
q 1.6435612 (2000.0) P Q
n 0.17359162 Peri. 210.71037 -0.01033409 +0.99045895
a 3.1826109 Node 59.02187 -0.88179362 +0.05577698
e 0.4835809 Incl. 9.22327 -0.47152224 -0.12601586
P 5.68
From 1334 observations 2016 Feb. 12-2024 Dec. 3, mean residual 1".1.
Nongravitational parameters A1 = +2.85, A2 = -0.4779.

72P/Denning-Fujikawa
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2023 June 15.43366 TT Pike
q 0.7831211 (2000.0) P Q
n 0.11023968 Peri. 346.73872 +0.97062393 -0.22494791
a 4.3076865 Node 26.72947 +0.23442205 +0.80426832
e 0.8182038 Incl. 10.94107 +0.05418016 +0.55004627
P 8.94
From 45 observations 2014 June 17-2023 June 20, mean residual 0".7.

73P/Schwassmann-Wachmann
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2027 Dec. 19.41464 TT Pike
q 0.8936339 (2000.0) P Q
n 0.18506665 Peri. 212.99584 -0.05226111 +0.99454017
a 3.0496543 Node 54.16615 -0.89040112 -0.00545216
e 0.7069721 Incl. 6.39682 -0.45216658 -0.10421196
P 5.33
From 2254 observations 2016 Feb. 13-2023 Aug. 15, mean residual 0".9.

74P/Smirnova-Chernykh
Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2026 Apr. 5.63406 TT Pike
q 4.8358928 (2000.0) P Q
n 0.08523289 Peri. 59.70145 -0.36156753 -0.92870963
a 5.1136526 Node 51.72455 +0.81538424 -0.35776325
e 0.0543173 Incl. 6.01502 +0.45212548 -0.09748784
P 11.6
From 1878 observations 2018 Jan. 1-2025 Nov. 21, mean residual 0".5.
Nongravitational parameters A1 = -2.01, A2 = -0.4256.