メタデータ
| 項目 |
値 |
| Designation |
C/2005 B1 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-02-23T13:43:37.490880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:46Z |
| Obs used |
1486 |
| NEO |
- |
| M1 |
11.500 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-01-10.0000000 |
| e |
1.00019141 |
| q (au) |
3.204932 |
| a (au) |
-16744.183157 |
| i (deg) |
92.551160 |
| Ω (om, deg) |
195.556048 |
| ω (w, deg) |
103.182514 |
| M (ma, deg) |
-0.000020 |
等級
散乱 + 全体線形
$$
M_a = (9.992 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.992 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.502 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2004-03-18 |
2006-02-03 |
+3.8130 |
-2.553 |
| 2006-03-02 |
2007-11-03 |
+0.9425 |
-0.298 |
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) |
| 2026-07-29 00:00 |
03:33:45.29 |
-56:34:37.9 |
HIP 16990 |
47.45 |
| 2026-07-29 12:00 |
03:33:47.27 |
-56:35:20.3 |
HIP 16990 |
47.61 |
| 2026-07-30 00:00 |
03:33:49.21 |
-56:36:03.0 |
HIP 16990 |
47.79 |
| 2026-07-30 12:00 |
03:33:51.11 |
-56:36:45.7 |
HIP 16990 |
47.98 |
| 2026-07-31 00:00 |
03:33:52.97 |
-56:37:28.6 |
HIP 16990 |
48.19 |
| 2026-07-31 12:00 |
03:33:54.79 |
-56:38:11.7 |
HIP 16990 |
48.42 |
| 2026-08-01 00:00 |
03:33:56.56 |
-56:38:54.8 |
HIP 16990 |
48.67 |
| 2026-08-01 12:00 |
03:33:58.30 |
-56:39:38.1 |
HIP 16990 |
48.93 |
| 2026-08-02 00:00 |
03:33:59.99 |
-56:40:21.6 |
HIP 16990 |
49.21 |
| 2026-08-02 12:00 |
03:34:01.64 |
-56:41:05.1 |
HIP 16952 |
48.98 |
| 2026-08-03 00:00 |
03:34:03.25 |
-56:41:48.8 |
HIP 16952 |
48.30 |
| 2026-08-03 12:00 |
03:34:04.82 |
-56:42:32.6 |
HIP 16952 |
47.62 |
| 2026-08-04 00:00 |
03:34:06.34 |
-56:43:16.5 |
HIP 16952 |
46.94 |
| 2026-08-04 12:00 |
03:34:07.83 |
-56:44:00.6 |
HIP 16952 |
46.27 |
| 2026-08-05 00:00 |
03:34:09.27 |
-56:44:44.7 |
HIP 16952 |
45.60 |
| 2026-08-05 12:00 |
03:34:10.66 |
-56:45:29.0 |
HIP 16952 |
44.94 |
| 2026-08-06 00:00 |
03:34:12.02 |
-56:46:13.4 |
HIP 16952 |
44.29 |
| 2026-08-06 12:00 |
03:34:13.33 |
-56:46:57.8 |
HIP 16952 |
43.64 |
| 2026-08-07 00:00 |
03:34:14.60 |
-56:47:42.4 |
HIP 16952 |
43.00 |
| 2026-08-07 12:00 |
03:34:15.83 |
-56:48:27.1 |
HIP 16952 |
42.37 |
| 2026-08-08 00:00 |
03:34:17.01 |
-56:49:11.9 |
HIP 16952 |
41.74 |
| 2026-08-08 12:00 |
03:34:18.15 |
-56:49:56.7 |
HIP 16952 |
41.13 |
| 2026-08-09 00:00 |
03:34:19.24 |
-56:50:41.7 |
HIP 16952 |
40.52 |
| 2026-08-09 12:00 |
03:34:20.29 |
-56:51:26.7 |
HIP 16952 |
39.92 |
| 2026-08-10 00:00 |
03:34:21.30 |
-56:52:11.9 |
HIP 16952 |
39.33 |
| 2026-08-10 12:00 |
03:34:22.26 |
-56:52:57.1 |
HIP 16952 |
38.75 |
| 2026-08-11 00:00 |
03:34:23.18 |
-56:53:42.4 |
HIP 16952 |
38.18 |
| 2026-08-11 12:00 |
03:34:24.05 |
-56:54:27.7 |
HIP 16952 |
37.63 |
| 2026-08-12 00:00 |
03:34:24.88 |
-56:55:13.2 |
HIP 16952 |
37.08 |
| 2026-08-12 12:00 |
03:34:25.66 |
-56:55:58.7 |
HIP 16952 |
36.55 |
| 2026-08-13 00:00 |
03:34:26.40 |
-56:56:44.2 |
HIP 16952 |
36.03 |
| 2026-08-13 12:00 |
03:34:27.10 |
-56:57:29.8 |
HIP 16952 |
35.52 |
| 2026-08-14 00:00 |
03:34:27.74 |
-56:58:15.5 |
HIP 16952 |
35.02 |
| 2026-08-14 12:00 |
03:34:28.35 |
-56:59:01.3 |
HIP 16952 |
34.55 |
| 2026-08-15 00:00 |
03:34:28.91 |
-56:59:47.1 |
HIP 16952 |
34.08 |
| 2026-08-15 12:00 |
03:34:29.42 |
-57:00:32.9 |
HIP 16952 |
33.64 |
| 2026-08-16 00:00 |
03:34:29.89 |
-57:01:18.8 |
HIP 16952 |
33.20 |
| 2026-08-16 12:00 |
03:34:30.31 |
-57:02:04.7 |
HIP 16952 |
32.79 |
| 2026-08-17 00:00 |
03:34:30.69 |
-57:02:50.7 |
HIP 16952 |
32.40 |
| 2026-08-17 12:00 |
03:34:31.02 |
-57:03:36.6 |
HIP 16952 |
32.02 |
| 2026-08-18 00:00 |
03:34:31.31 |
-57:04:22.7 |
HIP 16952 |
31.67 |
| 2026-08-18 12:00 |
03:34:31.55 |
-57:05:08.7 |
HIP 16952 |
31.33 |
| 2026-08-19 00:00 |
03:34:31.74 |
-57:05:54.8 |
HIP 16952 |
31.02 |