C/2006 U6 (Spacewatch)
メタデータ
| 項目 |
値 |
| Designation |
C/2006 U6 (Spacewatch) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-06-05T11:25:18.736320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:01Z |
| Obs used |
552 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
5.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-04-03.0000000 |
| e |
0.99870621 |
| q (au) |
2.498397 |
| a (au) |
1931.066467 |
| i (deg) |
84.878944 |
| Ω (om, deg) |
180.186317 |
| ω (w, deg) |
276.596980 |
| M (ma, deg) |
359.999263 |
等級
散乱 + 全体線形
$$
M_a = (13.450 + 2.405\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.450 |
| n |
2.405 |
| gf |
1.000 |
| gb |
-0.706 |
| k |
0.800 |
| 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 |
| 2006-09-15 |
2007-09-14 |
+2.5893 |
-1.956 |
| 2007-09-14 |
2008-05-08 |
-3.2129 |
+1.746 |
| 2008-06-11 |
2010-06-04 |
-0.0917 |
-0.202 |
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 |
15:18:46.08 |
+52:58:35.5 |
HIP 75065 |
17.72 |
| 2026-02-03 12:00 |
15:18:47.14 |
+52:59:24.1 |
HIP 75065 |
17.13 |
| 2026-02-04 00:00 |
15:18:48.15 |
+53:00:12.9 |
HIP 75065 |
16.56 |
| 2026-02-04 12:00 |
15:18:49.11 |
+53:01:01.7 |
HIP 75065 |
16.02 |
| 2026-02-05 00:00 |
15:18:50.03 |
+53:01:50.6 |
HIP 75065 |
15.52 |
| 2026-02-05 12:00 |
15:18:50.90 |
+53:02:39.6 |
HIP 75065 |
15.04 |
| 2026-02-06 00:00 |
15:18:51.72 |
+53:03:28.6 |
HIP 75065 |
14.61 |
| 2026-02-06 12:00 |
15:18:52.50 |
+53:04:17.8 |
HIP 75065 |
14.21 |
| 2026-02-07 00:00 |
15:18:53.23 |
+53:05:07.0 |
HIP 75065 |
13.86 |
| 2026-02-07 12:00 |
15:18:53.91 |
+53:05:56.3 |
HIP 75065 |
13.56 |
| 2026-02-08 00:00 |
15:18:54.55 |
+53:06:45.7 |
HIP 75065 |
13.31 |
| 2026-02-08 12:00 |
15:18:55.14 |
+53:07:35.1 |
HIP 75065 |
13.11 |
| 2026-02-09 00:00 |
15:18:55.69 |
+53:08:24.6 |
HIP 75065 |
12.97 |
| 2026-02-09 12:00 |
15:18:56.19 |
+53:09:14.2 |
HIP 75065 |
12.89 |
| 2026-02-10 00:00 |
15:18:56.64 |
+53:10:03.8 |
HIP 75065 |
12.87 |
| 2026-02-10 12:00 |
15:18:57.04 |
+53:10:53.4 |
HIP 75065 |
12.91 |
| 2026-02-11 00:00 |
15:18:57.40 |
+53:11:43.1 |
HIP 75065 |
13.02 |
| 2026-02-11 12:00 |
15:18:57.70 |
+53:12:32.8 |
HIP 75065 |
13.18 |
| 2026-02-12 00:00 |
15:18:57.97 |
+53:13:22.6 |
HIP 75065 |
13.39 |
| 2026-02-12 12:00 |
15:18:58.18 |
+53:14:12.4 |
HIP 75065 |
13.66 |
| 2026-02-13 00:00 |
15:18:58.35 |
+53:15:02.3 |
HIP 75065 |
13.98 |
| 2026-02-13 12:00 |
15:18:58.47 |
+53:15:52.2 |
HIP 75065 |
14.35 |
| 2026-02-14 00:00 |
15:18:58.54 |
+53:16:42.0 |
HIP 75065 |
14.76 |
| 2026-02-14 12:00 |
15:18:58.56 |
+53:17:32.0 |
HIP 75065 |
15.22 |
| 2026-02-15 00:00 |
15:18:58.54 |
+53:18:21.9 |
HIP 75065 |
15.71 |
| 2026-02-15 12:00 |
15:18:58.47 |
+53:19:11.8 |
HIP 75065 |
16.23 |
| 2026-02-16 00:00 |
15:18:58.35 |
+53:20:01.8 |
HIP 75065 |
16.78 |
| 2026-02-16 12:00 |
15:18:58.18 |
+53:20:51.7 |
HIP 75065 |
17.36 |
| 2026-02-17 00:00 |
15:18:57.97 |
+53:21:41.7 |
HIP 75065 |
17.97 |
| 2026-02-17 12:00 |
15:18:57.71 |
+53:22:31.6 |
HIP 75065 |
18.60 |
| 2026-02-18 00:00 |
15:18:57.40 |
+53:23:21.5 |
HIP 75065 |
19.25 |
| 2026-02-18 12:00 |
15:18:57.04 |
+53:24:11.5 |
HIP 75065 |
19.91 |
| 2026-02-19 00:00 |
15:18:56.64 |
+53:25:01.4 |
HIP 75065 |
20.60 |
| 2026-02-19 12:00 |
15:18:56.18 |
+53:25:51.2 |
HIP 75065 |
21.29 |
| 2026-02-20 00:00 |
15:18:55.68 |
+53:26:41.1 |
HIP 75065 |
22.00 |
| 2026-02-20 12:00 |
15:18:55.14 |
+53:27:30.9 |
HIP 75065 |
22.73 |
| 2026-02-21 00:00 |
15:18:54.54 |
+53:28:20.7 |
HIP 75065 |
23.46 |
| 2026-02-21 12:00 |
15:18:53.90 |
+53:29:10.5 |
HIP 75065 |
24.20 |
| 2026-02-22 00:00 |
15:18:53.21 |
+53:30:00.2 |
HIP 75065 |
24.96 |
| 2026-02-22 12:00 |
15:18:52.47 |
+53:30:49.9 |
HIP 75065 |
25.72 |
| 2026-02-23 00:00 |
15:18:51.69 |
+53:31:39.5 |
HIP 75065 |
26.49 |
| 2026-02-23 12:00 |
15:18:50.85 |
+53:32:29.0 |
HIP 75065 |
27.26 |
| 2026-02-24 00:00 |
15:18:49.98 |
+53:33:18.5 |
HIP 75065 |
28.04 |