メタデータ
| 項目 |
値 |
| Designation |
C/1906 B1 (Brooks) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1905-12-22T18:51:26.026560Z |
| Orbit solution date (soln_date, UTC) |
2024-02-20T20:16:47Z |
| Obs used |
158 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
16.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1906-02-22.0000000 |
| e |
0.99985360 |
| q (au) |
1.296232 |
| a (au) |
8853.993905 |
| i (deg) |
126.442402 |
| Ω (om, deg) |
287.708053 |
| ω (w, deg) |
89.843518 |
| M (ma, deg) |
0.000072 |
等級
散乱 + 全体線形
$$
M_a = (6.314 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.314 |
| n |
6.000 |
| gf |
0.973 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.849 |
| 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) |
| 2026-09-20 00:00 |
03:31:50.15 |
-35:23:36.9 |
HIP 16442 |
18.60 |
| 2026-09-20 12:00 |
03:31:49.58 |
-35:23:47.0 |
HIP 16442 |
18.43 |
| 2026-09-21 00:00 |
03:31:49.00 |
-35:23:57.1 |
HIP 16442 |
18.25 |
| 2026-09-21 12:00 |
03:31:48.41 |
-35:24:07.1 |
HIP 16442 |
18.08 |
| 2026-09-22 00:00 |
03:31:47.82 |
-35:24:17.1 |
HIP 16442 |
17.91 |
| 2026-09-22 12:00 |
03:31:47.21 |
-35:24:27.0 |
HIP 16442 |
17.74 |
| 2026-09-23 00:00 |
03:31:46.60 |
-35:24:36.9 |
HIP 16442 |
17.57 |
| 2026-09-23 12:00 |
03:31:45.99 |
-35:24:46.8 |
HIP 16442 |
17.41 |
| 2026-09-24 00:00 |
03:31:45.36 |
-35:24:56.6 |
HIP 16442 |
17.24 |
| 2026-09-24 12:00 |
03:31:44.73 |
-35:25:06.4 |
HIP 16442 |
17.08 |
| 2026-09-25 00:00 |
03:31:44.09 |
-35:25:16.2 |
HIP 16442 |
16.92 |
| 2026-09-25 12:00 |
03:31:43.45 |
-35:25:25.9 |
HIP 16442 |
16.76 |
| 2026-09-26 00:00 |
03:31:42.79 |
-35:25:35.5 |
HIP 16442 |
16.60 |
| 2026-09-26 12:00 |
03:31:42.13 |
-35:25:45.1 |
HIP 16442 |
16.45 |
| 2026-09-27 00:00 |
03:31:41.46 |
-35:25:54.7 |
HIP 16442 |
16.29 |
| 2026-09-27 12:00 |
03:31:40.79 |
-35:26:04.2 |
HIP 16442 |
16.14 |
| 2026-09-28 00:00 |
03:31:40.11 |
-35:26:13.7 |
HIP 16442 |
15.99 |
| 2026-09-28 12:00 |
03:31:39.42 |
-35:26:23.2 |
HIP 16442 |
15.84 |
| 2026-09-29 00:00 |
03:31:38.72 |
-35:26:32.6 |
HIP 16442 |
15.70 |
| 2026-09-29 12:00 |
03:31:38.02 |
-35:26:41.9 |
HIP 16442 |
15.56 |
| 2026-09-30 00:00 |
03:31:37.31 |
-35:26:51.2 |
HIP 16442 |
15.42 |
| 2026-09-30 12:00 |
03:31:36.59 |
-35:27:00.5 |
HIP 16442 |
15.28 |
| 2026-10-01 00:00 |
03:31:35.87 |
-35:27:09.7 |
HIP 16442 |
15.15 |
| 2026-10-01 12:00 |
03:31:35.14 |
-35:27:18.8 |
HIP 16442 |
15.01 |
| 2026-10-02 00:00 |
03:31:34.40 |
-35:27:27.9 |
HIP 16442 |
14.88 |
| 2026-10-02 12:00 |
03:31:33.66 |
-35:27:37.0 |
HIP 16442 |
14.76 |
| 2026-10-03 00:00 |
03:31:32.91 |
-35:27:46.0 |
HIP 16442 |
14.64 |
| 2026-10-03 12:00 |
03:31:32.15 |
-35:27:54.9 |
HIP 16442 |
14.52 |
| 2026-10-04 00:00 |
03:31:31.39 |
-35:28:03.8 |
HIP 16442 |
14.40 |
| 2026-10-04 12:00 |
03:31:30.62 |
-35:28:12.7 |
HIP 16442 |
14.29 |
| 2026-10-05 00:00 |
03:31:29.84 |
-35:28:21.4 |
HIP 16442 |
14.18 |
| 2026-10-05 12:00 |
03:31:29.06 |
-35:28:30.2 |
HIP 16442 |
14.07 |
| 2026-10-06 00:00 |
03:31:28.27 |
-35:28:38.8 |
HIP 16442 |
13.97 |
| 2026-10-06 12:00 |
03:31:27.48 |
-35:28:47.5 |
HIP 16442 |
13.87 |
| 2026-10-07 00:00 |
03:31:26.68 |
-35:28:56.0 |
HIP 16442 |
13.78 |
| 2026-10-07 12:00 |
03:31:25.87 |
-35:29:04.5 |
HIP 16442 |
13.69 |
| 2026-10-08 00:00 |
03:31:25.06 |
-35:29:12.9 |
HIP 16442 |
13.60 |
| 2026-10-08 12:00 |
03:31:24.24 |
-35:29:21.3 |
HIP 16442 |
13.52 |
| 2026-10-09 00:00 |
03:31:23.41 |
-35:29:29.6 |
HIP 16442 |
13.44 |
| 2026-10-09 12:00 |
03:31:22.58 |
-35:29:37.9 |
HIP 16442 |
13.37 |
| 2026-10-10 00:00 |
03:31:21.74 |
-35:29:46.1 |
HIP 16442 |
13.30 |
| 2026-10-10 12:00 |
03:31:20.90 |
-35:29:54.2 |
HIP 16442 |
13.24 |
| 2026-10-11 00:00 |
03:31:20.05 |
-35:30:02.3 |
HIP 16442 |
13.18 |