メタデータ
| 項目 |
値 |
| Designation |
C/2001 W1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-12-24T21:37:29.415360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:11Z |
| Obs used |
101 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2001-12-04.0000000 |
| e |
0.99892724 |
| q (au) |
2.399249 |
| a (au) |
2236.511889 |
| i (deg) |
118.645272 |
| Ω (om, deg) |
91.939782 |
| ω (w, deg) |
6.161504 |
| M (ma, deg) |
359.999805 |
等級
散乱 + 全体線形
$$
M_a = (14.635 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.635 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.512 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
18:50:15.37 |
-04:48:09.1 |
HIP 92278 |
29.36 |
| 2026-05-12 12:00 |
18:50:13.64 |
-04:48:03.3 |
HIP 92278 |
28.97 |
| 2026-05-13 00:00 |
18:50:11.89 |
-04:47:57.6 |
HIP 92278 |
28.58 |
| 2026-05-13 12:00 |
18:50:10.13 |
-04:47:52.1 |
HIP 92278 |
28.19 |
| 2026-05-14 00:00 |
18:50:08.35 |
-04:47:46.5 |
HIP 92278 |
27.79 |
| 2026-05-14 12:00 |
18:50:06.55 |
-04:47:41.1 |
HIP 92278 |
27.39 |
| 2026-05-15 00:00 |
18:50:04.73 |
-04:47:35.8 |
HIP 92278 |
26.99 |
| 2026-05-15 12:00 |
18:50:02.90 |
-04:47:30.6 |
HIP 92278 |
26.58 |
| 2026-05-16 00:00 |
18:50:01.05 |
-04:47:25.4 |
HIP 92278 |
26.18 |
| 2026-05-16 12:00 |
18:49:59.18 |
-04:47:20.4 |
HIP 92278 |
25.77 |
| 2026-05-17 00:00 |
18:49:57.30 |
-04:47:15.4 |
HIP 92278 |
25.35 |
| 2026-05-17 12:00 |
18:49:55.40 |
-04:47:10.6 |
HIP 92278 |
24.94 |
| 2026-05-18 00:00 |
18:49:53.48 |
-04:47:05.8 |
HIP 92278 |
24.52 |
| 2026-05-18 12:00 |
18:49:51.55 |
-04:47:01.1 |
HIP 92278 |
24.10 |
| 2026-05-19 00:00 |
18:49:49.60 |
-04:46:56.5 |
HIP 92278 |
23.69 |
| 2026-05-19 12:00 |
18:49:47.63 |
-04:46:52.1 |
HIP 92278 |
23.26 |
| 2026-05-20 00:00 |
18:49:45.65 |
-04:46:47.7 |
HIP 92278 |
22.84 |
| 2026-05-20 12:00 |
18:49:43.66 |
-04:46:43.4 |
HIP 92278 |
22.42 |
| 2026-05-21 00:00 |
18:49:41.64 |
-04:46:39.2 |
HIP 92278 |
21.99 |
| 2026-05-21 12:00 |
18:49:39.62 |
-04:46:35.1 |
HIP 92278 |
21.57 |
| 2026-05-22 00:00 |
18:49:37.57 |
-04:46:31.1 |
HIP 92278 |
21.14 |
| 2026-05-22 12:00 |
18:49:35.52 |
-04:46:27.1 |
HIP 92278 |
20.72 |
| 2026-05-23 00:00 |
18:49:33.44 |
-04:46:23.3 |
HIP 92278 |
20.29 |
| 2026-05-23 12:00 |
18:49:31.36 |
-04:46:19.6 |
HIP 92278 |
19.87 |
| 2026-05-24 00:00 |
18:49:29.25 |
-04:46:16.0 |
HIP 92278 |
19.44 |
| 2026-05-24 12:00 |
18:49:27.14 |
-04:46:12.5 |
HIP 92278 |
19.02 |
| 2026-05-25 00:00 |
18:49:25.01 |
-04:46:09.1 |
HIP 92278 |
18.60 |
| 2026-05-25 12:00 |
18:49:22.86 |
-04:46:05.7 |
HIP 92278 |
18.18 |
| 2026-05-26 00:00 |
18:49:20.71 |
-04:46:02.5 |
HIP 92278 |
17.77 |
| 2026-05-26 12:00 |
18:49:18.53 |
-04:45:59.4 |
HIP 92278 |
17.35 |
| 2026-05-27 00:00 |
18:49:16.35 |
-04:45:56.4 |
HIP 92278 |
16.94 |
| 2026-05-27 12:00 |
18:49:14.15 |
-04:45:53.4 |
HIP 92278 |
16.54 |
| 2026-05-28 00:00 |
18:49:11.94 |
-04:45:50.6 |
HIP 92278 |
16.14 |
| 2026-05-28 12:00 |
18:49:09.71 |
-04:45:47.9 |
HIP 92278 |
15.74 |
| 2026-05-29 00:00 |
18:49:07.47 |
-04:45:45.3 |
HIP 92278 |
15.36 |
| 2026-05-29 12:00 |
18:49:05.22 |
-04:45:42.8 |
HIP 92278 |
14.98 |
| 2026-05-30 00:00 |
18:49:02.96 |
-04:45:40.3 |
HIP 92278 |
14.60 |
| 2026-05-30 12:00 |
18:49:00.68 |
-04:45:38.0 |
HIP 92278 |
14.24 |
| 2026-05-31 00:00 |
18:48:58.40 |
-04:45:35.8 |
HIP 92278 |
13.89 |
| 2026-05-31 12:00 |
18:48:56.09 |
-04:45:33.7 |
HIP 92278 |
13.55 |
| 2026-06-01 00:00 |
18:48:53.78 |
-04:45:31.7 |
HIP 92278 |
13.22 |
| 2026-06-01 12:00 |
18:48:51.46 |
-04:45:29.8 |
HIP 92278 |
12.91 |
| 2026-06-02 00:00 |
18:48:49.12 |
-04:45:28.0 |
HIP 92278 |
12.61 |