メタデータ
| 項目 |
値 |
| Designation |
C/2006 W3 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-07-06T15:35:19.720320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:02Z |
| Obs used |
5639 |
| NEO |
- |
| M1 |
8.200 |
| K1 |
5.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-03-11.0000000 |
| e |
0.99982443 |
| q (au) |
3.126233 |
| a (au) |
17806.222961 |
| i (deg) |
127.074694 |
| Ω (om, deg) |
113.570597 |
| ω (w, deg) |
133.514480 |
| M (ma, deg) |
359.999951 |
等級
散乱 + 全体線形
$$
M_a = (6.022 + 3.691\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.022 |
| n |
3.691 |
| gf |
1.000 |
| gb |
-0.517 |
| 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 |
| 2006-10-29 |
2009-07-06 |
+3.5691 |
-2.737 |
| 2009-07-06 |
2011-09-24 |
+0.7709 |
-1.054 |
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) |
| 2026-05-12 00:00 |
10:31:51.39 |
-50:12:01.8 |
HIP 51625 |
9.96 |
| 2026-05-12 12:00 |
10:31:49.80 |
-50:11:12.8 |
HIP 51625 |
9.92 |
| 2026-05-13 00:00 |
10:31:48.24 |
-50:10:23.9 |
HIP 51625 |
9.94 |
| 2026-05-13 12:00 |
10:31:46.73 |
-50:09:34.9 |
HIP 51625 |
10.03 |
| 2026-05-14 00:00 |
10:31:45.26 |
-50:08:46.0 |
HIP 51625 |
10.19 |
| 2026-05-14 12:00 |
10:31:43.83 |
-50:07:57.0 |
HIP 51625 |
10.40 |
| 2026-05-15 00:00 |
10:31:42.45 |
-50:07:08.1 |
HIP 51625 |
10.67 |
| 2026-05-15 12:00 |
10:31:41.11 |
-50:06:19.2 |
HIP 51625 |
10.99 |
| 2026-05-16 00:00 |
10:31:39.81 |
-50:05:30.3 |
HIP 51625 |
11.36 |
| 2026-05-16 12:00 |
10:31:38.56 |
-50:04:41.4 |
HIP 51625 |
11.77 |
| 2026-05-17 00:00 |
10:31:37.35 |
-50:03:52.5 |
HIP 51625 |
12.22 |
| 2026-05-17 12:00 |
10:31:36.18 |
-50:03:03.7 |
HIP 51625 |
12.70 |
| 2026-05-18 00:00 |
10:31:35.06 |
-50:02:14.9 |
HIP 51625 |
13.21 |
| 2026-05-18 12:00 |
10:31:33.98 |
-50:01:26.2 |
HIP 51625 |
13.74 |
| 2026-05-19 00:00 |
10:31:32.95 |
-50:00:37.5 |
HIP 51625 |
14.30 |
| 2026-05-19 12:00 |
10:31:31.95 |
-49:59:48.8 |
HIP 51625 |
14.88 |
| 2026-05-20 00:00 |
10:31:31.00 |
-49:59:00.2 |
HIP 51625 |
15.47 |
| 2026-05-20 12:00 |
10:31:30.10 |
-49:58:11.6 |
HIP 51625 |
16.08 |
| 2026-05-21 00:00 |
10:31:29.24 |
-49:57:23.1 |
HIP 51625 |
16.70 |
| 2026-05-21 12:00 |
10:31:28.42 |
-49:56:34.7 |
HIP 51625 |
17.33 |
| 2026-05-22 00:00 |
10:31:27.64 |
-49:55:46.3 |
HIP 51625 |
17.97 |
| 2026-05-22 12:00 |
10:31:26.91 |
-49:54:57.9 |
HIP 51625 |
18.62 |
| 2026-05-23 00:00 |
10:31:26.22 |
-49:54:09.7 |
HIP 51625 |
19.27 |
| 2026-05-23 12:00 |
10:31:25.57 |
-49:53:21.5 |
HIP 51625 |
19.93 |
| 2026-05-24 00:00 |
10:31:24.97 |
-49:52:33.4 |
HIP 51625 |
20.60 |
| 2026-05-24 12:00 |
10:31:24.41 |
-49:51:45.4 |
HIP 51625 |
21.27 |
| 2026-05-25 00:00 |
10:31:23.89 |
-49:50:57.4 |
HIP 51625 |
21.95 |
| 2026-05-25 12:00 |
10:31:23.41 |
-49:50:09.6 |
HIP 51625 |
22.62 |
| 2026-05-26 00:00 |
10:31:22.98 |
-49:49:21.8 |
HIP 51625 |
23.31 |
| 2026-05-26 12:00 |
10:31:22.59 |
-49:48:34.1 |
HIP 51580 |
22.69 |
| 2026-05-27 00:00 |
10:31:22.24 |
-49:47:46.5 |
HIP 51580 |
21.95 |
| 2026-05-27 12:00 |
10:31:21.93 |
-49:46:59.0 |
HIP 51580 |
21.23 |
| 2026-05-28 00:00 |
10:31:21.67 |
-49:46:11.6 |
HIP 51580 |
20.50 |
| 2026-05-28 12:00 |
10:31:21.45 |
-49:45:24.4 |
HIP 51580 |
19.78 |
| 2026-05-29 00:00 |
10:31:21.27 |
-49:44:37.2 |
HIP 51580 |
19.07 |
| 2026-05-29 12:00 |
10:31:21.13 |
-49:43:50.1 |
HIP 51580 |
18.35 |
| 2026-05-30 00:00 |
10:31:21.04 |
-49:43:03.2 |
HIP 51580 |
17.65 |
| 2026-05-30 12:00 |
10:31:20.98 |
-49:42:16.3 |
HIP 51580 |
16.95 |
| 2026-05-31 00:00 |
10:31:20.97 |
-49:41:29.6 |
HIP 51580 |
16.25 |
| 2026-05-31 12:00 |
10:31:21.00 |
-49:40:43.0 |
HIP 51580 |
15.57 |
| 2026-06-01 00:00 |
10:31:21.08 |
-49:39:56.5 |
HIP 51580 |
14.88 |
| 2026-06-01 12:00 |
10:31:21.19 |
-49:39:10.2 |
HIP 51580 |
14.21 |
| 2026-06-02 00:00 |
10:31:21.34 |
-49:38:23.9 |
HIP 51580 |
13.55 |