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) |
| 2026-05-12 00:00 |
03:33:55.18 |
+65:36:32.4 |
HIP 16580 |
4.53 |
| 2026-05-12 12:00 |
03:34:01.66 |
+65:36:35.8 |
HIP 16580 |
5.03 |
| 2026-05-13 00:00 |
03:34:08.13 |
+65:36:39.4 |
HIP 16580 |
5.57 |
| 2026-05-13 12:00 |
03:34:14.61 |
+65:36:43.3 |
HIP 16580 |
6.14 |
| 2026-05-14 00:00 |
03:34:21.09 |
+65:36:47.5 |
HIP 16580 |
6.73 |
| 2026-05-14 12:00 |
03:34:27.58 |
+65:36:51.9 |
HIP 16580 |
7.34 |
| 2026-05-15 00:00 |
03:34:34.06 |
+65:36:56.5 |
HIP 16580 |
7.96 |
| 2026-05-15 12:00 |
03:34:40.55 |
+65:37:01.4 |
HIP 16580 |
8.59 |
| 2026-05-16 00:00 |
03:34:47.05 |
+65:37:06.6 |
HIP 16580 |
9.23 |
| 2026-05-16 12:00 |
03:34:53.54 |
+65:37:12.0 |
HIP 16580 |
9.87 |
| 2026-05-17 00:00 |
03:35:00.03 |
+65:37:17.7 |
HIP 16580 |
10.53 |
| 2026-05-17 12:00 |
03:35:06.52 |
+65:37:23.7 |
HIP 16580 |
11.18 |
| 2026-05-18 00:00 |
03:35:13.01 |
+65:37:29.9 |
HIP 16580 |
11.84 |
| 2026-05-18 12:00 |
03:35:19.50 |
+65:37:36.3 |
HIP 16580 |
12.51 |
| 2026-05-19 00:00 |
03:35:25.99 |
+65:37:43.0 |
HIP 16580 |
13.17 |
| 2026-05-19 12:00 |
03:35:32.48 |
+65:37:50.0 |
HIP 16580 |
13.84 |
| 2026-05-20 00:00 |
03:35:38.97 |
+65:37:57.2 |
HIP 16580 |
14.51 |
| 2026-05-20 12:00 |
03:35:45.45 |
+65:38:04.6 |
HIP 16580 |
15.18 |
| 2026-05-21 00:00 |
03:35:51.93 |
+65:38:12.3 |
HIP 16907 |
14.68 |
| 2026-05-21 12:00 |
03:35:58.40 |
+65:38:20.2 |
HIP 16907 |
14.12 |
| 2026-05-22 00:00 |
03:36:04.88 |
+65:38:28.4 |
HIP 16907 |
13.56 |
| 2026-05-22 12:00 |
03:36:11.34 |
+65:38:36.9 |
HIP 16907 |
13.01 |
| 2026-05-23 00:00 |
03:36:17.80 |
+65:38:45.6 |
HIP 16907 |
12.48 |
| 2026-05-23 12:00 |
03:36:24.26 |
+65:38:54.5 |
HIP 16907 |
11.95 |
| 2026-05-24 00:00 |
03:36:30.71 |
+65:39:03.7 |
HIP 16907 |
11.44 |
| 2026-05-24 12:00 |
03:36:37.16 |
+65:39:13.1 |
HIP 16907 |
10.94 |
| 2026-05-25 00:00 |
03:36:43.60 |
+65:39:22.7 |
HIP 16907 |
10.46 |
| 2026-05-25 12:00 |
03:36:50.03 |
+65:39:32.6 |
HIP 16907 |
10.00 |
| 2026-05-26 00:00 |
03:36:56.45 |
+65:39:42.8 |
HIP 16907 |
9.57 |
| 2026-05-26 12:00 |
03:37:02.87 |
+65:39:53.2 |
HIP 16907 |
9.16 |
| 2026-05-27 00:00 |
03:37:09.28 |
+65:40:03.8 |
HIP 16907 |
8.78 |
| 2026-05-27 12:00 |
03:37:15.68 |
+65:40:14.6 |
HIP 16907 |
8.43 |
| 2026-05-28 00:00 |
03:37:22.07 |
+65:40:25.7 |
HIP 16907 |
8.13 |
| 2026-05-28 12:00 |
03:37:28.45 |
+65:40:37.1 |
HIP 16907 |
7.87 |
| 2026-05-29 00:00 |
03:37:34.82 |
+65:40:48.6 |
HIP 16907 |
7.65 |
| 2026-05-29 12:00 |
03:37:41.19 |
+65:41:00.4 |
HIP 16907 |
7.49 |
| 2026-05-30 00:00 |
03:37:47.54 |
+65:41:12.5 |
HIP 16907 |
7.38 |
| 2026-05-30 12:00 |
03:37:53.88 |
+65:41:24.7 |
HIP 16907 |
7.34 |
| 2026-05-31 00:00 |
03:38:00.21 |
+65:41:37.2 |
HIP 17036 |
7.19 |
| 2026-05-31 12:00 |
03:38:06.53 |
+65:41:49.9 |
HIP 17036 |
6.64 |
| 2026-06-01 00:00 |
03:38:12.84 |
+65:42:02.9 |
HIP 17036 |
6.11 |
| 2026-06-01 12:00 |
03:38:19.13 |
+65:42:16.1 |
HIP 17036 |
5.63 |
| 2026-06-02 00:00 |
03:38:25.41 |
+65:42:29.5 |
HIP 17036 |
5.19 |