Comet Archive

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C/2009 B2 (LINEAR)

メタデータ

項目 値
Designation C/2009 B2 (LINEAR)
Type C
Perihelion (tp_cal, UTC) 2009-03-07T09:25:59.010240Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:31:28Z
Obs used 187
NEO -
M1 13.000
K1 10.000
PC 0.030
オスキュレーティング軌道要素
項目 値
Epoch (epoch_cal, TDB) 2009-03-11.0000000
e 0.94428145
q (au) 2.327612
a (au) 41.774447
i (deg) 156.872979
Ω (om, deg) 18.814641
ω (w, deg) 192.495776
M (ma, deg) 0.013167

等級

C/2009 B2 (LINEAR) · Magnitude (Full range)

散乱 + 全体線形

$$ M_a = (14.370 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目 値
H0 14.370
n 2.000
gf 1.000
gb -0.916
k 1.000
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

天体暦

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-02-03 00:00 01:52:50.47 +06:27:02.7 HIP 8587 29.79
2026-02-03 12:00 01:52:51.06 +06:27:12.4 HIP 8587 29.91
2026-02-04 00:00 01:52:51.67 +06:27:22.3 HIP 8587 30.04
2026-02-04 12:00 01:52:52.32 +06:27:32.4 HIP 8587 30.17
2026-02-05 00:00 01:52:52.99 +06:27:42.6 HIP 8587 30.31
2026-02-05 12:00 01:52:53.70 +06:27:53.0 HIP 8617 30.44
2026-02-06 00:00 01:52:54.43 +06:28:03.5 HIP 8617 30.51
2026-02-06 12:00 01:52:55.19 +06:28:14.2 HIP 8617 30.58
2026-02-07 00:00 01:52:55.98 +06:28:25.0 HIP 8617 30.66
2026-02-07 12:00 01:52:56.81 +06:28:36.0 HIP 8617 30.75
2026-02-08 00:00 01:52:57.66 +06:28:47.1 HIP 8617 30.85
2026-02-08 12:00 01:52:58.53 +06:28:58.3 HIP 8617 30.95
2026-02-09 00:00 01:52:59.44 +06:29:09.7 HIP 8617 31.06
2026-02-09 12:00 01:53:00.38 +06:29:21.2 HIP 8617 31.18
2026-02-10 00:00 01:53:01.35 +06:29:32.9 HIP 8617 31.31
2026-02-10 12:00 01:53:02.34 +06:29:44.7 HIP 8617 31.44
2026-02-11 00:00 01:53:03.36 +06:29:56.6 HIP 8617 31.58
2026-02-11 12:00 01:53:04.41 +06:30:08.7 HIP 8617 31.74
2026-02-12 00:00 01:53:05.49 +06:30:21.0 HIP 8617 31.89
2026-02-12 12:00 01:53:06.60 +06:30:33.3 HIP 8617 32.06
2026-02-13 00:00 01:53:07.74 +06:30:45.8 HIP 8617 32.24
2026-02-13 12:00 01:53:08.90 +06:30:58.4 HIP 8617 32.42
2026-02-14 00:00 01:53:10.09 +06:31:11.2 HIP 8951 32.24
2026-02-14 12:00 01:53:11.31 +06:31:24.1 HIP 8951 31.98
2026-02-15 00:00 01:53:12.55 +06:31:37.1 HIP 8951 31.71
2026-02-15 12:00 01:53:13.83 +06:31:50.2 HIP 8951 31.44
2026-02-16 00:00 01:53:15.13 +06:32:03.5 HIP 8951 31.16
2026-02-16 12:00 01:53:16.46 +06:32:16.9 HIP 8951 30.88
2026-02-17 00:00 01:53:17.81 +06:32:30.5 HIP 8951 30.59
2026-02-17 12:00 01:53:19.19 +06:32:44.1 HIP 8951 30.31
2026-02-18 00:00 01:53:20.60 +06:32:57.9 HIP 8951 30.01
2026-02-18 12:00 01:53:22.04 +06:33:11.8 HIP 8951 29.72
2026-02-19 00:00 01:53:23.50 +06:33:25.8 HIP 8951 29.42
2026-02-19 12:00 01:53:24.98 +06:33:40.0 HIP 8951 29.13
2026-02-20 00:00 01:53:26.50 +06:33:54.2 HIP 8951 28.82
2026-02-20 12:00 01:53:28.03 +06:34:08.6 HIP 8951 28.52
2026-02-21 00:00 01:53:29.60 +06:34:23.1 HIP 8951 28.22
2026-02-21 12:00 01:53:31.19 +06:34:37.7 HIP 8951 27.91
2026-02-22 00:00 01:53:32.80 +06:34:52.4 HIP 8951 27.60
2026-02-22 12:00 01:53:34.44 +06:35:07.2 HIP 8951 27.30
2026-02-23 00:00 01:53:36.11 +06:35:22.2 HIP 8951 26.99
2026-02-23 12:00 01:53:37.80 +06:35:37.2 HIP 8951 26.68
2026-02-24 00:00 01:53:39.51 +06:35:52.4 HIP 8951 26.38