C/2005 B1 (Christensen)
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 |
0.999 |
| gb |
-0.762 |
| 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) |
| 2026-02-03 00:00 |
03:12:02.96 |
-57:11:43.3 |
HIP 14930 |
8.60 |
| 2026-02-03 12:00 |
03:12:02.55 |
-57:11:01.4 |
HIP 14930 |
9.25 |
| 2026-02-04 00:00 |
03:12:02.19 |
-57:10:19.4 |
HIP 14930 |
9.90 |
| 2026-02-04 12:00 |
03:12:01.88 |
-57:09:37.4 |
HIP 14930 |
10.56 |
| 2026-02-05 00:00 |
03:12:01.62 |
-57:08:55.3 |
HIP 14930 |
11.22 |
| 2026-02-05 12:00 |
03:12:01.40 |
-57:08:13.1 |
HIP 14930 |
11.88 |
| 2026-02-06 00:00 |
03:12:01.23 |
-57:07:30.9 |
HIP 14930 |
12.55 |
| 2026-02-06 12:00 |
03:12:01.11 |
-57:06:48.7 |
HIP 14930 |
13.22 |
| 2026-02-07 00:00 |
03:12:01.04 |
-57:06:06.4 |
HIP 14930 |
13.89 |
| 2026-02-07 12:00 |
03:12:01.01 |
-57:05:24.0 |
HIP 14930 |
14.56 |
| 2026-02-08 00:00 |
03:12:01.03 |
-57:04:41.7 |
HIP 14930 |
15.23 |
| 2026-02-08 12:00 |
03:12:01.10 |
-57:03:59.3 |
HIP 14930 |
15.91 |
| 2026-02-09 00:00 |
03:12:01.22 |
-57:03:16.9 |
HIP 14930 |
16.59 |
| 2026-02-09 12:00 |
03:12:01.39 |
-57:02:34.4 |
HIP 15045 |
17.01 |
| 2026-02-10 00:00 |
03:12:01.60 |
-57:01:52.0 |
HIP 15045 |
16.69 |
| 2026-02-10 12:00 |
03:12:01.86 |
-57:01:09.5 |
HIP 15045 |
16.38 |
| 2026-02-11 00:00 |
03:12:02.17 |
-57:00:27.0 |
HIP 15045 |
16.10 |
| 2026-02-11 12:00 |
03:12:02.53 |
-56:59:44.5 |
HIP 15045 |
15.84 |
| 2026-02-12 00:00 |
03:12:02.94 |
-56:59:01.9 |
HIP 15045 |
15.60 |
| 2026-02-12 12:00 |
03:12:03.39 |
-56:58:19.4 |
HIP 15045 |
15.38 |
| 2026-02-13 00:00 |
03:12:03.89 |
-56:57:36.9 |
HIP 15045 |
15.18 |
| 2026-02-13 12:00 |
03:12:04.43 |
-56:56:54.4 |
HIP 15045 |
15.01 |
| 2026-02-14 00:00 |
03:12:05.03 |
-56:56:11.9 |
HIP 15045 |
14.87 |
| 2026-02-14 12:00 |
03:12:05.67 |
-56:55:29.4 |
HIP 15045 |
14.75 |
| 2026-02-15 00:00 |
03:12:06.36 |
-56:54:46.9 |
HIP 15045 |
14.66 |
| 2026-02-15 12:00 |
03:12:07.09 |
-56:54:04.4 |
HIP 15045 |
14.60 |
| 2026-02-16 00:00 |
03:12:07.87 |
-56:53:21.9 |
HIP 15045 |
14.56 |
| 2026-02-16 12:00 |
03:12:08.70 |
-56:52:39.5 |
HIP 15045 |
14.56 |
| 2026-02-17 00:00 |
03:12:09.58 |
-56:51:57.1 |
HIP 15045 |
14.58 |
| 2026-02-17 12:00 |
03:12:10.50 |
-56:51:14.7 |
HIP 15045 |
14.64 |
| 2026-02-18 00:00 |
03:12:11.47 |
-56:50:32.4 |
HIP 15045 |
14.72 |
| 2026-02-18 12:00 |
03:12:12.49 |
-56:49:50.1 |
HIP 15045 |
14.83 |
| 2026-02-19 00:00 |
03:12:13.55 |
-56:49:07.8 |
HIP 15045 |
14.96 |
| 2026-02-19 12:00 |
03:12:14.65 |
-56:48:25.6 |
HIP 15045 |
15.13 |
| 2026-02-20 00:00 |
03:12:15.81 |
-56:47:43.4 |
HIP 15045 |
15.32 |
| 2026-02-20 12:00 |
03:12:17.01 |
-56:47:01.3 |
HIP 15045 |
15.53 |
| 2026-02-21 00:00 |
03:12:18.25 |
-56:46:19.3 |
HIP 15045 |
15.77 |
| 2026-02-21 12:00 |
03:12:19.54 |
-56:45:37.3 |
HIP 15045 |
16.03 |
| 2026-02-22 00:00 |
03:12:20.88 |
-56:44:55.3 |
HIP 15045 |
16.32 |
| 2026-02-22 12:00 |
03:12:22.26 |
-56:44:13.4 |
HIP 15045 |
16.62 |
| 2026-02-23 00:00 |
03:12:23.68 |
-56:43:31.6 |
HIP 15045 |
16.95 |
| 2026-02-23 12:00 |
03:12:25.15 |
-56:42:49.9 |
HIP 15045 |
17.29 |
| 2026-02-24 00:00 |
03:12:26.67 |
-56:42:08.2 |
HIP 15045 |
17.66 |