メタデータ
| 項目 |
値 |
| Designation |
C/2006 B1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-11-19T12:22:21.066240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
184 |
| NEO |
- |
| M1 |
13.300 |
| 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) |
2006-04-29.0000000 |
| e |
0.99776536 |
| q (au) |
2.997591 |
| a (au) |
1341.421761 |
| i (deg) |
134.281929 |
| Ω (om, deg) |
161.239384 |
| ω (w, deg) |
302.491743 |
| M (ma, deg) |
0.003220 |
等級
散乱 + 全体線形
$$
M_a = (13.124 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.124 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.908 |
| k |
0.999 |
| 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 |
03:25:03.61 |
+65:50:51.5 |
HIP 15899 |
23.43 |
| 2026-03-26 12:00 |
03:25:07.87 |
+65:50:30.4 |
HIP 15899 |
23.11 |
| 2026-03-27 00:00 |
03:25:12.17 |
+65:50:09.5 |
HIP 15899 |
22.80 |
| 2026-03-27 12:00 |
03:25:16.51 |
+65:49:48.9 |
HIP 15899 |
22.52 |
| 2026-03-28 00:00 |
03:25:20.90 |
+65:49:28.5 |
HIP 15899 |
22.24 |
| 2026-03-28 12:00 |
03:25:25.32 |
+65:49:08.3 |
HIP 15899 |
21.98 |
| 2026-03-29 00:00 |
03:25:29.79 |
+65:48:48.4 |
HIP 15899 |
21.74 |
| 2026-03-29 12:00 |
03:25:34.29 |
+65:48:28.8 |
HIP 15899 |
21.52 |
| 2026-03-30 00:00 |
03:25:38.84 |
+65:48:09.4 |
HIP 15899 |
21.31 |
| 2026-03-30 12:00 |
03:25:43.42 |
+65:47:50.2 |
HIP 15899 |
21.12 |
| 2026-03-31 00:00 |
03:25:48.05 |
+65:47:31.3 |
HIP 15899 |
20.95 |
| 2026-03-31 12:00 |
03:25:52.71 |
+65:47:12.6 |
HIP 15899 |
20.81 |
| 2026-04-01 00:00 |
03:25:57.41 |
+65:46:54.2 |
HIP 15899 |
20.68 |
| 2026-04-01 12:00 |
03:26:02.15 |
+65:46:36.0 |
HIP 15899 |
20.57 |
| 2026-04-02 00:00 |
03:26:06.92 |
+65:46:18.1 |
HIP 15899 |
20.48 |
| 2026-04-02 12:00 |
03:26:11.73 |
+65:46:00.4 |
HIP 15899 |
20.41 |
| 2026-04-03 00:00 |
03:26:16.58 |
+65:45:43.0 |
HIP 15899 |
20.37 |
| 2026-04-03 12:00 |
03:26:21.47 |
+65:45:25.8 |
HIP 15899 |
20.35 |
| 2026-04-04 00:00 |
03:26:26.39 |
+65:45:08.9 |
HIP 15899 |
20.35 |
| 2026-04-04 12:00 |
03:26:31.35 |
+65:44:52.2 |
HIP 15899 |
20.37 |
| 2026-04-05 00:00 |
03:26:36.34 |
+65:44:35.8 |
HIP 15899 |
20.41 |
| 2026-04-05 12:00 |
03:26:41.37 |
+65:44:19.7 |
HIP 15899 |
20.48 |
| 2026-04-06 00:00 |
03:26:46.43 |
+65:44:03.8 |
HIP 15899 |
20.57 |
| 2026-04-06 12:00 |
03:26:51.53 |
+65:43:48.1 |
HIP 15899 |
20.68 |
| 2026-04-07 00:00 |
03:26:56.66 |
+65:43:32.7 |
HIP 15899 |
20.81 |
| 2026-04-07 12:00 |
03:27:01.82 |
+65:43:17.6 |
HIP 15899 |
20.96 |
| 2026-04-08 00:00 |
03:27:07.02 |
+65:43:02.7 |
HIP 15899 |
21.13 |
| 2026-04-08 12:00 |
03:27:12.25 |
+65:42:48.1 |
HIP 15899 |
21.33 |
| 2026-04-09 00:00 |
03:27:17.51 |
+65:42:33.8 |
HIP 15899 |
21.54 |
| 2026-04-09 12:00 |
03:27:22.80 |
+65:42:19.7 |
HIP 15899 |
21.78 |
| 2026-04-10 00:00 |
03:27:28.13 |
+65:42:05.8 |
HIP 15899 |
22.03 |
| 2026-04-10 12:00 |
03:27:33.48 |
+65:41:52.2 |
HIP 15899 |
22.30 |
| 2026-04-11 00:00 |
03:27:38.87 |
+65:41:38.9 |
HIP 15899 |
22.59 |
| 2026-04-11 12:00 |
03:27:44.29 |
+65:41:25.9 |
HIP 15899 |
22.90 |
| 2026-04-12 00:00 |
03:27:49.73 |
+65:41:13.1 |
HIP 15899 |
23.22 |
| 2026-04-12 12:00 |
03:27:55.21 |
+65:41:00.5 |
HIP 15899 |
23.56 |
| 2026-04-13 00:00 |
03:28:00.72 |
+65:40:48.3 |
HIP 15899 |
23.92 |
| 2026-04-13 12:00 |
03:28:06.25 |
+65:40:36.3 |
HIP 15899 |
24.29 |
| 2026-04-14 00:00 |
03:28:11.81 |
+65:40:24.5 |
HIP 15899 |
24.67 |
| 2026-04-14 12:00 |
03:28:17.41 |
+65:40:13.1 |
HIP 15899 |
25.07 |
| 2026-04-15 00:00 |
03:28:23.02 |
+65:40:01.9 |
HIP 15899 |
25.48 |
| 2026-04-15 12:00 |
03:28:28.67 |
+65:39:50.9 |
HIP 15899 |
25.90 |
| 2026-04-16 00:00 |
03:28:34.34 |
+65:39:40.2 |
HIP 15899 |
26.34 |