Silvester

217P/LINEAR, К-1, К-2, #1900, #2242 (Outburst!), #2280

Комета доступна для наблюдения в течение ночи в телескопы от 6" ..
Условия ее видимости ухудшаются, комета гаснет ..
Положение для Москвы на рис. ?4 (время в подписи к рисунку)
Вторая группа эфемерид учитывает положение кометы на 24:00 мск (см. ниже)

Дата, блеск, размер комы и конденсация:
2009 11. 14.17 ..S: m1 = 10.6, Dia. = 3', DC = 1, 0.12-m R
2009 11. 13.33 UT: m1 = 12.4, Dia. = 1.1', DC = .., 2-m N f5
2009 11. 13.32 UT: m1 = 11.5, Dia. = 1.2', DC = 2, SCT 14"
2009 11. 13.31 UT: m1 = 11.9, Dia. = 1.2', DC = .., хвост = 2.3', pa = 160њ, 101mmL + CCD
2009 11. 13.12 ..S: m1 = 10.6, Dia. = 2.5', DC = 4/, 0.22-m L (х160).
2009 11. 12.35 UT: m1 = 13.1, Dia. = 0.9', DC = .., 2-m N f5
2009 11. 12.24 UT: m1 = 12.9, Dia. = 1.3', DC = 2, SCT 14"
2009 11. 12.23 UT: m1 = 11.8, Dia. = 1.0', DC = .., хвост = 1.4', pa = 124њ, 101mmL + CCD
2009 11. 11.51 UT: m1 = 11.4, Dia. = 2', DC = 2, хвоста нет, 0.25-m L, f5 (х83).
2009 11. 10.50 UT: m1 = 11.4, Dia. = 2.4', DC = 2/3, кома W, 0.25-m L, f5 (х83).
2009 11. 09.30 UT: m1 = 13.1, Dia. = 1.3', DC = .., 2-m N f5
2009 11. 09.25 UT: m1 = 12.3, Dia. = 0.6', DC = .., 101mmL + CCD

#2279

Элементы орбиты:
Epoch 2009 Sept. 6.0 TT = JDT 2455080.5
T 2009 Sept. 8.9669 TT MPC
q 1.223980 (2000.0) P Q
n 0.1258685 Peri. 246.7444 +0.9580029 -0.2222396
a 3.943283 Node 125.6220 +0.2656078 +0.9258980
e 0.689604 Incl. 12.8814 -0.1080881 +0.3054873
P 7.83
From 371 observations 2001-2009, mean residual 0".7.
--
Элементы орбиты:
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5
T 2009 Sept. 8.9694 TT MPC
q 1.224011 (2000.0) P Q
n 0.1258951 Peri. 246.7486 +0.9579894 -0.2222957
a 3.942729 Node 125.6211 +0.2656630 +0.9258816
e 0.689552 Incl. 12.8815 -0.1080717 +0.3054963
P 7.83

Эфемериды:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2009 11 14 06 23.42 -02 51.1 0.638 1.479 129.5 31.1 12.7
2009 11 15 06 22.96 -02 42.7 0.639 1.486 130.5 30.4 12.7
2009 11 16 06 22.45 -02 33.9 0.641 1.493 131.5 29.8 12.8
2009 11 17 06 21.90 -02 24.7 0.643 1.500 132.5 29.1 12.8
2009 11 18 06 21.29 -02 15.2 0.645 1.507 133.5 28.4 12.8
2009 11 19 06 20.64 -02 05.3 0.646 1.514 134.5 27.7 12.9
2009 11 20 06 19.95 -01 55.0 0.648 1.521 135.6 27.1 12.9
2009 11 21 06 19.21 -01 44.4 0.651 1.528 136.6 26.4 12.9

Эфемериды 217P/LINEAR на 24:00 мск.:
Date ...... UT ...... R.A. (J2000) ... Decl. ......... R.A. (J2000) ..... Decl. .... Delta .... r ... El. ... Ph. .. V
2009 11 14 210000 06:23:01.325 -02:43:46.041 06:23:02.245 -02:43:38.591 0.639 1.485 130.3 30.5 12.7
2009 11 15 210000 06:22:31.130 -02:35:00.315 06:22:32.056 -02:34:52.940 0.641 1.492 131.3 29.9 12.8
2009 11 16 210000 06:21:58.019 -02:25:52.980 06:21:58.953 -02:25:45.681 0.642 1.499 132.3 29.2 12.8
2009 11 17 210000 06:21:22.082 -02:16:23.990 06:21:23.023 -02:16:16.768 0.644 1.506 133.4 28.5 12.8
2009 11 18 210000 06:20:43.415 -02:06:33.354 06:20:44.362 -02:06:26.211 0.646 1.513 134.4 27.8 12.8
2009 11 19 210000 06:20:02.115 -01:56:21.141 06:20:03.069 -01:56:14.077 0.648 1.52 135.4 27.1 12.9
2009 11 20 210000 06:19:18.289 -01:45:47.476 06:19:19.249 -01:45:40.491 0.65 1.527 136.5 26.5 12.9
2009 11 21 210000 06:18:32.042 -01:34:52.540 06:18:33.010 -01:34:45.634 0.653 1.534 137.5 25.8 12.9

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