メタデータ
| 項目 |
値 |
| Designation |
C/2006 A1 (Pojmanski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-02-22T04:21:22.887360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
600 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
16.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-03-24.0000000 |
| e |
0.99976626 |
| q (au) |
0.555396 |
| a (au) |
2376.082997 |
| i (deg) |
92.736122 |
| Ω (om, deg) |
211.343233 |
| ω (w, deg) |
351.187789 |
| M (ma, deg) |
0.000254 |
等級
散乱 + 全体線形
$$
M_a = (9.583 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.583 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
| 2006-01-04 |
2006-01-23 |
+11.6706 |
+1.828 |
| 2006-01-23 |
2006-02-21 |
-6.7238 |
-1.282 |
| 2006-02-22 |
2006-04-26 |
-8.0722 |
-1.039 |
| 2006-04-26 |
2006-12-12 |
-5.5681 |
-0.447 |
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) |
| 2026-06-01 00:00 |
01:30:24.38 |
+32:49:23.1 |
HIP 7012 |
18.41 |
| 2026-06-01 12:00 |
01:30:26.55 |
+32:49:43.8 |
HIP 7012 |
18.11 |
| 2026-06-02 00:00 |
01:30:28.71 |
+32:50:04.5 |
HIP 7012 |
17.82 |
| 2026-06-02 12:00 |
01:30:30.86 |
+32:50:25.1 |
HIP 7012 |
17.55 |
| 2026-06-03 00:00 |
01:30:32.98 |
+32:50:45.9 |
HIP 7012 |
17.29 |
| 2026-06-03 12:00 |
01:30:35.08 |
+32:51:06.6 |
HIP 7012 |
17.04 |
| 2026-06-04 00:00 |
01:30:37.17 |
+32:51:27.3 |
HIP 7012 |
16.81 |
| 2026-06-04 12:00 |
01:30:39.24 |
+32:51:48.0 |
HIP 7012 |
16.59 |
| 2026-06-05 00:00 |
01:30:41.28 |
+32:52:08.7 |
HIP 7012 |
16.38 |
| 2026-06-05 12:00 |
01:30:43.31 |
+32:52:29.5 |
HIP 7012 |
16.19 |
| 2026-06-06 00:00 |
01:30:45.32 |
+32:52:50.2 |
HIP 7012 |
16.02 |
| 2026-06-06 12:00 |
01:30:47.31 |
+32:53:10.9 |
HIP 7012 |
15.86 |
| 2026-06-07 00:00 |
01:30:49.28 |
+32:53:31.7 |
HIP 7012 |
15.71 |
| 2026-06-07 12:00 |
01:30:51.23 |
+32:53:52.4 |
HIP 7012 |
15.58 |
| 2026-06-08 00:00 |
01:30:53.16 |
+32:54:13.1 |
HIP 7012 |
15.47 |
| 2026-06-08 12:00 |
01:30:55.07 |
+32:54:33.8 |
HIP 7012 |
15.37 |
| 2026-06-09 00:00 |
01:30:56.97 |
+32:54:54.5 |
HIP 7012 |
15.29 |
| 2026-06-09 12:00 |
01:30:58.84 |
+32:55:15.2 |
HIP 7012 |
15.22 |
| 2026-06-10 00:00 |
01:31:00.68 |
+32:55:35.9 |
HIP 7012 |
15.17 |
| 2026-06-10 12:00 |
01:31:02.51 |
+32:55:56.6 |
HIP 7012 |
15.13 |
| 2026-06-11 00:00 |
01:31:04.32 |
+32:56:17.3 |
HIP 7012 |
15.11 |
| 2026-06-11 12:00 |
01:31:06.11 |
+32:56:37.9 |
HIP 7012 |
15.10 |
| 2026-06-12 00:00 |
01:31:07.88 |
+32:56:58.6 |
HIP 7012 |
15.11 |
| 2026-06-12 12:00 |
01:31:09.62 |
+32:57:19.2 |
HIP 7012 |
15.13 |
| 2026-06-13 00:00 |
01:31:11.34 |
+32:57:39.8 |
HIP 7012 |
15.16 |
| 2026-06-13 12:00 |
01:31:13.05 |
+32:58:00.4 |
HIP 7012 |
15.21 |
| 2026-06-14 00:00 |
01:31:14.73 |
+32:58:20.9 |
HIP 7012 |
15.27 |
| 2026-06-14 12:00 |
01:31:16.39 |
+32:58:41.4 |
HIP 7012 |
15.34 |
| 2026-06-15 00:00 |
01:31:18.02 |
+32:59:02.0 |
HIP 7012 |
15.42 |
| 2026-06-15 12:00 |
01:31:19.64 |
+32:59:22.4 |
HIP 7012 |
15.51 |
| 2026-06-16 00:00 |
01:31:21.23 |
+32:59:42.9 |
HIP 7012 |
15.62 |
| 2026-06-16 12:00 |
01:31:22.80 |
+33:00:03.3 |
HIP 7012 |
15.73 |
| 2026-06-17 00:00 |
01:31:24.35 |
+33:00:23.7 |
HIP 7012 |
15.86 |
| 2026-06-17 12:00 |
01:31:25.88 |
+33:00:44.1 |
HIP 7012 |
15.99 |
| 2026-06-18 00:00 |
01:31:27.38 |
+33:01:04.4 |
HIP 7012 |
16.13 |
| 2026-06-18 12:00 |
01:31:28.86 |
+33:01:24.7 |
HIP 7012 |
16.28 |
| 2026-06-19 00:00 |
01:31:30.32 |
+33:01:44.9 |
HIP 7012 |
16.43 |
| 2026-06-19 12:00 |
01:31:31.75 |
+33:02:05.1 |
HIP 7012 |
16.59 |
| 2026-06-20 00:00 |
01:31:33.16 |
+33:02:25.3 |
HIP 7012 |
16.76 |
| 2026-06-20 12:00 |
01:31:34.55 |
+33:02:45.4 |
HIP 7012 |
16.94 |
| 2026-06-21 00:00 |
01:31:35.92 |
+33:03:05.5 |
HIP 7012 |
17.11 |
| 2026-06-21 12:00 |
01:31:37.26 |
+33:03:25.5 |
HIP 7012 |
17.30 |
| 2026-06-22 00:00 |
01:31:38.58 |
+33:03:45.5 |
HIP 7012 |
17.49 |