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
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) |
| 2026-03-26 00:00 |
01:56:00.11 |
+06:53:31.2 |
HIP 8946 |
19.10 |
| 2026-03-26 12:00 |
01:56:02.96 |
+06:53:50.5 |
HIP 8946 |
19.28 |
| 2026-03-27 00:00 |
01:56:05.82 |
+06:54:09.9 |
HIP 8946 |
19.49 |
| 2026-03-27 12:00 |
01:56:08.69 |
+06:54:29.2 |
HIP 8946 |
19.74 |
| 2026-03-28 00:00 |
01:56:11.57 |
+06:54:48.6 |
HIP 8946 |
20.01 |
| 2026-03-28 12:00 |
01:56:14.47 |
+06:55:08.0 |
HIP 8946 |
20.31 |
| 2026-03-29 00:00 |
01:56:17.37 |
+06:55:27.5 |
HIP 8946 |
20.64 |
| 2026-03-29 12:00 |
01:56:20.29 |
+06:55:46.9 |
HIP 8946 |
20.99 |
| 2026-03-30 00:00 |
01:56:23.21 |
+06:56:06.4 |
HIP 8946 |
21.37 |
| 2026-03-30 12:00 |
01:56:26.15 |
+06:56:25.8 |
HIP 8946 |
21.78 |
| 2026-03-31 00:00 |
01:56:29.09 |
+06:56:45.3 |
HIP 8946 |
22.21 |
| 2026-03-31 12:00 |
01:56:32.05 |
+06:57:04.9 |
HIP 8946 |
22.66 |
| 2026-04-01 00:00 |
01:56:35.02 |
+06:57:24.4 |
HIP 8946 |
23.13 |
| 2026-04-01 12:00 |
01:56:37.99 |
+06:57:43.9 |
HIP 8946 |
23.62 |
| 2026-04-02 00:00 |
01:56:40.98 |
+06:58:03.5 |
HIP 8946 |
24.13 |
| 2026-04-02 12:00 |
01:56:43.97 |
+06:58:23.0 |
HIP 8946 |
24.66 |
| 2026-04-03 00:00 |
01:56:46.97 |
+06:58:42.6 |
HIP 8946 |
25.20 |
| 2026-04-03 12:00 |
01:56:49.98 |
+06:59:02.2 |
HIP 8946 |
25.76 |
| 2026-04-04 00:00 |
01:56:53.00 |
+06:59:21.7 |
HIP 8946 |
26.34 |
| 2026-04-04 12:00 |
01:56:56.03 |
+06:59:41.3 |
HIP 8946 |
26.93 |
| 2026-04-05 00:00 |
01:56:59.07 |
+07:00:00.9 |
HIP 8946 |
27.53 |
| 2026-04-05 12:00 |
01:57:02.11 |
+07:00:20.5 |
HIP 8946 |
28.15 |
| 2026-04-06 00:00 |
01:57:05.16 |
+07:00:40.1 |
HIP 8946 |
28.78 |
| 2026-04-06 12:00 |
01:57:08.22 |
+07:00:59.7 |
HIP 8946 |
29.42 |
| 2026-04-07 00:00 |
01:57:11.29 |
+07:01:19.2 |
HIP 8946 |
30.07 |
| 2026-04-07 12:00 |
01:57:14.36 |
+07:01:38.8 |
HIP 8946 |
30.73 |
| 2026-04-08 00:00 |
01:57:17.44 |
+07:01:58.4 |
HIP 8946 |
31.40 |
| 2026-04-08 12:00 |
01:57:20.52 |
+07:02:18.0 |
HIP 8946 |
32.09 |
| 2026-04-09 00:00 |
01:57:23.62 |
+07:02:37.5 |
HIP 9253 |
31.98 |
| 2026-04-09 12:00 |
01:57:26.72 |
+07:02:57.1 |
HIP 9253 |
31.66 |
| 2026-04-10 00:00 |
01:57:29.82 |
+07:03:16.6 |
HIP 9253 |
31.36 |
| 2026-04-10 12:00 |
01:57:32.93 |
+07:03:36.2 |
HIP 9253 |
31.08 |
| 2026-04-11 00:00 |
01:57:36.04 |
+07:03:55.7 |
HIP 9253 |
30.82 |
| 2026-04-11 12:00 |
01:57:39.16 |
+07:04:15.2 |
HIP 9253 |
30.57 |
| 2026-04-12 00:00 |
01:57:42.29 |
+07:04:34.7 |
HIP 9253 |
30.35 |
| 2026-04-12 12:00 |
01:57:45.42 |
+07:04:54.2 |
HIP 9253 |
30.15 |
| 2026-04-13 00:00 |
01:57:48.55 |
+07:05:13.6 |
HIP 9253 |
29.97 |
| 2026-04-13 12:00 |
01:57:51.69 |
+07:05:33.1 |
HIP 9253 |
29.81 |
| 2026-04-14 00:00 |
01:57:54.84 |
+07:05:52.5 |
HIP 9253 |
29.67 |
| 2026-04-14 12:00 |
01:57:57.98 |
+07:06:11.9 |
HIP 9253 |
29.56 |
| 2026-04-15 00:00 |
01:58:01.13 |
+07:06:31.3 |
HIP 9253 |
29.47 |
| 2026-04-15 12:00 |
01:58:04.28 |
+07:06:50.7 |
HIP 9253 |
29.40 |
| 2026-04-16 00:00 |
01:58:07.44 |
+07:07:10.0 |
HIP 9253 |
29.36 |