Comet Archive

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C/2001 OG108 (LONEOS)

メタデータ

項目 値
Designation C/2001 OG108 (LONEOS)
Type C
Perihelion (tp_cal, UTC) 2002-03-15T04:56:44.543040Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:30:10Z
Obs used 882
NEO Yes
M1 13.300
K1 11.500
PC -
オスキュレーティング軌道要素
項目 値
Epoch (epoch_cal, TDB) 2001-12-05.0000000
e 0.92526008
q (au) 0.994048
a (au) 13.300093
i (deg) 80.245059
Ω (om, deg) 10.555290
ω (w, deg) 116.419511
M (ma, deg) 357.963820

等級

C/2001 OG108 (LONEOS) · Magnitude (Full range)

散乱 + 全体線形

$$ M_a = (10.668 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目 値
H0 10.668
n 6.000
gf 1.000
gb -0.831
k 0.800
δ90 10.000
パラメータ 記号 範囲 説明
太陽・地球距離が1 AUのときの絶対等級 H0 -5 to 20 彗星の固有の明るさ
測光スロープパラメータ n 2 to 6 太陽距離に対する明るさ変化率
前方散乱非対称係数 gf 0.8 to 1 前方散乱の強さ
後方散乱非対称係数 gb -1 to -0.5 後方散乱の強さ
分配係数 k 0.8 to 1 前方/後方散乱の寄与比
ダスト/ガス明るさ比 δ90 1 to 10 ダスト散乱とガス放射の相対寄与

参考: EPSC-DPS2025-160

残差 (区間線形)

$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$

開始日 (UTC) 終了日 (UTC) a b
2001-08-27 2002-02-03 +1.6625 +1.044
2002-02-03 2002-03-15 +16.7740 -0.745
2002-03-15 2002-04-29 +26.2855 -0.105
2002-04-29 2002-06-05 -11.8897 +2.380

log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)

天体暦

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-02-03 00:00 01:53:26.83 -56:44:34.7 HIP 8780 7.26
2026-02-03 12:00 01:53:28.45 -56:43:26.3 HIP 8780 6.51
2026-02-04 00:00 01:53:30.14 -56:42:18.0 HIP 8780 5.91
2026-02-04 12:00 01:53:31.89 -56:41:09.8 HIP 8780 5.49
2026-02-05 00:00 01:53:33.71 -56:40:01.6 HIP 8780 5.31
2026-02-05 12:00 01:53:35.59 -56:38:53.6 HIP 8780 5.39
2026-02-06 00:00 01:53:37.54 -56:37:45.6 HIP 8780 5.72
2026-02-06 12:00 01:53:39.55 -56:36:37.7 HIP 8780 6.26
2026-02-07 00:00 01:53:41.62 -56:35:29.9 HIP 8780 6.96
2026-02-07 12:00 01:53:43.76 -56:34:22.2 HIP 8780 7.78
2026-02-08 00:00 01:53:45.95 -56:33:14.6 HIP 8780 8.69
2026-02-08 12:00 01:53:48.22 -56:32:07.2 HIP 8780 9.66
2026-02-09 00:00 01:53:50.54 -56:30:59.8 HIP 8780 10.67
2026-02-09 12:00 01:53:52.92 -56:29:52.5 HIP 8767 11.71
2026-02-10 00:00 01:53:55.37 -56:28:45.4 HIP 8767 11.29
2026-02-10 12:00 01:53:57.88 -56:27:38.4 HIP 8767 10.99
2026-02-11 00:00 01:54:00.45 -56:26:31.5 HIP 8767 10.82
2026-02-11 12:00 01:54:03.08 -56:25:24.8 HIP 8767 10.79
2026-02-12 00:00 01:54:05.77 -56:24:18.2 HIP 8767 10.89
2026-02-12 12:00 01:54:08.52 -56:23:11.7 HIP 8767 11.12
2026-02-13 00:00 01:54:11.33 -56:22:05.4 HIP 8767 11.48
2026-02-13 12:00 01:54:14.20 -56:20:59.3 HIP 8767 11.94
2026-02-14 00:00 01:54:17.13 -56:19:53.3 HIP 8767 12.51
2026-02-14 12:00 01:54:20.12 -56:18:47.5 HIP 8767 13.17
2026-02-15 00:00 01:54:23.17 -56:17:41.8 HIP 8767 13.90
2026-02-15 12:00 01:54:26.27 -56:16:36.3 HIP 8767 14.70
2026-02-16 00:00 01:54:29.44 -56:15:31.0 HIP 8767 15.55
2026-02-16 12:00 01:54:32.66 -56:14:25.8 HIP 8767 16.45
2026-02-17 00:00 01:54:35.94 -56:13:20.9 HIP 8767 17.38
2026-02-17 12:00 01:54:39.27 -56:12:16.1 HIP 8767 18.35
2026-02-18 00:00 01:54:42.67 -56:11:11.5 HIP 8767 19.35
2026-02-18 12:00 01:54:46.12 -56:10:07.1 HIP 8767 20.37
2026-02-19 00:00 01:54:49.62 -56:09:03.0 HIP 8767 21.41
2026-02-19 12:00 01:54:53.18 -56:07:59.0 HIP 8767 22.46
2026-02-20 00:00 01:54:56.80 -56:06:55.2 HIP 8767 23.53
2026-02-20 12:00 01:55:00.47 -56:05:51.7 HIP 8767 24.62
2026-02-21 00:00 01:55:04.19 -56:04:48.3 HIP 8767 25.72
2026-02-21 12:00 01:55:07.97 -56:03:45.2 HIP 8767 26.82
2026-02-22 00:00 01:55:11.80 -56:02:42.4 HIP 8767 27.94
2026-02-22 12:00 01:55:15.69 -56:01:39.7 HIP 8767 29.06
2026-02-23 00:00 01:55:19.62 -56:00:37.3 HIP 8767 30.19
2026-02-23 12:00 01:55:23.61 -55:59:35.1 HIP 8711 31.02
2026-02-24 00:00 01:55:27.65 -55:58:33.2 HIP 8711 31.09