C/2006 WD4 (Lemmon)
メタデータ
| 項目 |
値 |
| Designation |
C/2006 WD4 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-04-28T09:33:26.683200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:02Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
17.200 |
| 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) |
2007-01-20.0000000 |
| e |
0.99898724 |
| q (au) |
0.591244 |
| a (au) |
583.797842 |
| i (deg) |
152.704616 |
| Ω (om, deg) |
226.790541 |
| ω (w, deg) |
292.690897 |
| M (ma, deg) |
359.993125 |
等級
散乱 + 全体線形
$$
M_a = (13.923 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.923 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
09:14:41.44 |
+45:00:40.0 |
HIP 45348 |
8.23 |
| 2026-02-03 12:00 |
09:14:37.06 |
+45:00:53.6 |
HIP 45348 |
8.26 |
| 2026-02-04 00:00 |
09:14:32.68 |
+45:01:07.0 |
HIP 45348 |
8.36 |
| 2026-02-04 12:00 |
09:14:28.31 |
+45:01:20.2 |
HIP 45348 |
8.53 |
| 2026-02-05 00:00 |
09:14:23.93 |
+45:01:33.2 |
HIP 45348 |
8.77 |
| 2026-02-05 12:00 |
09:14:19.55 |
+45:01:46.0 |
HIP 45348 |
9.07 |
| 2026-02-06 00:00 |
09:14:15.17 |
+45:01:58.6 |
HIP 45348 |
9.43 |
| 2026-02-06 12:00 |
09:14:10.79 |
+45:02:10.9 |
HIP 45348 |
9.84 |
| 2026-02-07 00:00 |
09:14:06.42 |
+45:02:23.1 |
HIP 45348 |
10.29 |
| 2026-02-07 12:00 |
09:14:02.04 |
+45:02:35.0 |
HIP 45348 |
10.77 |
| 2026-02-08 00:00 |
09:13:57.67 |
+45:02:46.7 |
HIP 45348 |
11.29 |
| 2026-02-08 12:00 |
09:13:53.30 |
+45:02:58.2 |
HIP 45348 |
11.84 |
| 2026-02-09 00:00 |
09:13:48.93 |
+45:03:09.5 |
HIP 45348 |
12.41 |
| 2026-02-09 12:00 |
09:13:44.56 |
+45:03:20.5 |
HIP 45348 |
13.00 |
| 2026-02-10 00:00 |
09:13:40.20 |
+45:03:31.4 |
HIP 45348 |
13.61 |
| 2026-02-10 12:00 |
09:13:35.84 |
+45:03:42.0 |
HIP 45348 |
14.23 |
| 2026-02-11 00:00 |
09:13:31.48 |
+45:03:52.4 |
HIP 45348 |
14.87 |
| 2026-02-11 12:00 |
09:13:27.13 |
+45:04:02.5 |
HIP 45348 |
15.52 |
| 2026-02-12 00:00 |
09:13:22.78 |
+45:04:12.5 |
HIP 45348 |
16.17 |
| 2026-02-12 12:00 |
09:13:18.44 |
+45:04:22.2 |
HIP 45348 |
16.84 |
| 2026-02-13 00:00 |
09:13:14.10 |
+45:04:31.7 |
HIP 45348 |
17.51 |
| 2026-02-13 12:00 |
09:13:09.77 |
+45:04:41.0 |
HIP 45348 |
18.18 |
| 2026-02-14 00:00 |
09:13:05.44 |
+45:04:50.1 |
HIP 45348 |
18.87 |
| 2026-02-14 12:00 |
09:13:01.12 |
+45:04:58.9 |
HIP 45348 |
19.55 |
| 2026-02-15 00:00 |
09:12:56.81 |
+45:05:07.5 |
HIP 45133 |
20.01 |
| 2026-02-15 12:00 |
09:12:52.50 |
+45:05:15.9 |
HIP 45133 |
19.66 |
| 2026-02-16 00:00 |
09:12:48.20 |
+45:05:24.0 |
HIP 45133 |
19.33 |
| 2026-02-16 12:00 |
09:12:43.91 |
+45:05:31.9 |
HIP 45133 |
19.02 |
| 2026-02-17 00:00 |
09:12:39.63 |
+45:05:39.6 |
HIP 45133 |
18.74 |
| 2026-02-17 12:00 |
09:12:35.36 |
+45:05:47.1 |
HIP 45133 |
18.48 |
| 2026-02-18 00:00 |
09:12:31.09 |
+45:05:54.3 |
HIP 45133 |
18.25 |
| 2026-02-18 12:00 |
09:12:26.84 |
+45:06:01.3 |
HIP 45133 |
18.05 |
| 2026-02-19 00:00 |
09:12:22.59 |
+45:06:08.0 |
HIP 45133 |
17.87 |
| 2026-02-19 12:00 |
09:12:18.35 |
+45:06:14.6 |
HIP 45133 |
17.72 |
| 2026-02-20 00:00 |
09:12:14.13 |
+45:06:20.9 |
HIP 45133 |
17.59 |
| 2026-02-20 12:00 |
09:12:09.92 |
+45:06:26.9 |
HIP 45133 |
17.50 |
| 2026-02-21 00:00 |
09:12:05.71 |
+45:06:32.8 |
HIP 45133 |
17.43 |
| 2026-02-21 12:00 |
09:12:01.52 |
+45:06:38.4 |
HIP 45133 |
17.40 |
| 2026-02-22 00:00 |
09:11:57.34 |
+45:06:43.8 |
HIP 45133 |
17.39 |
| 2026-02-22 12:00 |
09:11:53.17 |
+45:06:48.9 |
HIP 45133 |
17.41 |
| 2026-02-23 00:00 |
09:11:49.02 |
+45:06:53.8 |
HIP 45133 |
17.46 |
| 2026-02-23 12:00 |
09:11:44.88 |
+45:06:58.5 |
HIP 45133 |
17.53 |
| 2026-02-24 00:00 |
09:11:40.75 |
+45:07:02.9 |
HIP 45133 |
17.63 |