C/2010 B1 (Cardinal)
メタデータ
| 項目 |
値 |
| Designation |
C/2010 B1 (Cardinal) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-02-07T01:26:00.456000Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:12:44Z |
| Obs used |
2090 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
7.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-10-26.0000000 |
| e |
0.99899435 |
| q (au) |
2.941487 |
| a (au) |
2924.960222 |
| i (deg) |
101.977683 |
| Ω (om, deg) |
277.213907 |
| ω (w, deg) |
211.519913 |
| M (ma, deg) |
359.999352 |
等級
散乱 + 全体線形
$$
M_a = (10.297 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.297 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.830 |
| 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 |
| 2010-01-19 |
2010-08-30 |
+4.8258 |
-3.113 |
| 2010-08-30 |
2011-02-06 |
-10.8740 |
+5.213 |
| 2011-02-07 |
2012-09-21 |
+2.8113 |
-1.265 |
| 2012-09-21 |
2014-03-13 |
-33.3518 |
+27.438 |
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 |
18:40:43.50 |
-26:53:34.9 |
HIP 91621 |
10.47 |
| 2026-02-03 12:00 |
18:40:46.84 |
-26:53:29.7 |
HIP 91621 |
10.05 |
| 2026-02-04 00:00 |
18:40:50.15 |
-26:53:24.5 |
HIP 91621 |
9.67 |
| 2026-02-04 12:00 |
18:40:53.44 |
-26:53:19.4 |
HIP 91621 |
9.34 |
| 2026-02-05 00:00 |
18:40:56.71 |
-26:53:14.3 |
HIP 91621 |
9.06 |
| 2026-02-05 12:00 |
18:40:59.96 |
-26:53:09.2 |
HIP 91621 |
8.83 |
| 2026-02-06 00:00 |
18:41:03.19 |
-26:53:04.2 |
HIP 91621 |
8.66 |
| 2026-02-06 12:00 |
18:41:06.40 |
-26:52:59.3 |
HIP 91621 |
8.55 |
| 2026-02-07 00:00 |
18:41:09.59 |
-26:52:54.4 |
HIP 91621 |
8.50 |
| 2026-02-07 12:00 |
18:41:12.75 |
-26:52:49.5 |
HIP 91621 |
8.51 |
| 2026-02-08 00:00 |
18:41:15.89 |
-26:52:44.7 |
HIP 91621 |
8.57 |
| 2026-02-08 12:00 |
18:41:19.01 |
-26:52:39.9 |
HIP 91621 |
8.70 |
| 2026-02-09 00:00 |
18:41:22.11 |
-26:52:35.1 |
HIP 91621 |
8.87 |
| 2026-02-09 12:00 |
18:41:25.19 |
-26:52:30.4 |
HIP 91621 |
9.09 |
| 2026-02-10 00:00 |
18:41:28.24 |
-26:52:25.7 |
HIP 91621 |
9.36 |
| 2026-02-10 12:00 |
18:41:31.27 |
-26:52:21.1 |
HIP 91621 |
9.67 |
| 2026-02-11 00:00 |
18:41:34.27 |
-26:52:16.5 |
HIP 91621 |
10.01 |
| 2026-02-11 12:00 |
18:41:37.26 |
-26:52:12.0 |
HIP 91621 |
10.38 |
| 2026-02-12 00:00 |
18:41:40.21 |
-26:52:07.5 |
HIP 91621 |
10.77 |
| 2026-02-12 12:00 |
18:41:43.15 |
-26:52:03.0 |
HIP 91621 |
11.19 |
| 2026-02-13 00:00 |
18:41:46.06 |
-26:51:58.6 |
HIP 91621 |
11.63 |
| 2026-02-13 12:00 |
18:41:48.94 |
-26:51:54.2 |
HIP 91621 |
12.08 |
| 2026-02-14 00:00 |
18:41:51.80 |
-26:51:49.9 |
HIP 91621 |
12.55 |
| 2026-02-14 12:00 |
18:41:54.64 |
-26:51:45.6 |
HIP 91621 |
13.02 |
| 2026-02-15 00:00 |
18:41:57.45 |
-26:51:41.3 |
HIP 91621 |
13.51 |
| 2026-02-15 12:00 |
18:42:00.23 |
-26:51:37.1 |
HIP 91621 |
14.00 |
| 2026-02-16 00:00 |
18:42:02.99 |
-26:51:33.0 |
HIP 91621 |
14.50 |
| 2026-02-16 12:00 |
18:42:05.72 |
-26:51:28.8 |
HIP 91621 |
15.00 |
| 2026-02-17 00:00 |
18:42:08.43 |
-26:51:24.8 |
HIP 91621 |
15.50 |
| 2026-02-17 12:00 |
18:42:11.11 |
-26:51:20.7 |
HIP 91750 |
15.99 |
| 2026-02-18 00:00 |
18:42:13.76 |
-26:51:16.7 |
HIP 91750 |
15.74 |
| 2026-02-18 12:00 |
18:42:16.38 |
-26:51:12.8 |
HIP 91750 |
15.52 |
| 2026-02-19 00:00 |
18:42:18.98 |
-26:51:08.9 |
HIP 91750 |
15.31 |
| 2026-02-19 12:00 |
18:42:21.55 |
-26:51:05.0 |
HIP 91750 |
15.12 |
| 2026-02-20 00:00 |
18:42:24.10 |
-26:51:01.2 |
HIP 91750 |
14.96 |
| 2026-02-20 12:00 |
18:42:26.61 |
-26:50:57.5 |
HIP 91750 |
14.82 |
| 2026-02-21 00:00 |
18:42:29.10 |
-26:50:53.7 |
HIP 91750 |
14.70 |
| 2026-02-21 12:00 |
18:42:31.56 |
-26:50:50.1 |
HIP 91750 |
14.60 |
| 2026-02-22 00:00 |
18:42:33.99 |
-26:50:46.4 |
HIP 91750 |
14.52 |
| 2026-02-22 12:00 |
18:42:36.40 |
-26:50:42.8 |
HIP 91750 |
14.47 |
| 2026-02-23 00:00 |
18:42:38.77 |
-26:50:39.3 |
HIP 91750 |
14.43 |
| 2026-02-23 12:00 |
18:42:41.12 |
-26:50:35.8 |
HIP 91750 |
14.41 |
| 2026-02-24 00:00 |
18:42:43.43 |
-26:50:32.3 |
HIP 91750 |
14.42 |