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) |
| 2026-03-26 00:00 |
18:51:26.11 |
-05:02:03.0 |
HIP 92654 |
26.38 |
| 2026-03-26 12:00 |
18:51:26.39 |
-05:01:52.3 |
HIP 92654 |
26.22 |
| 2026-03-27 00:00 |
18:51:26.64 |
-05:01:41.5 |
HIP 92654 |
26.06 |
| 2026-03-27 12:00 |
18:51:26.88 |
-05:01:30.8 |
HIP 92654 |
25.90 |
| 2026-03-28 00:00 |
18:51:27.09 |
-05:01:20.1 |
HIP 92654 |
25.75 |
| 2026-03-28 12:00 |
18:51:27.28 |
-05:01:09.4 |
HIP 92654 |
25.61 |
| 2026-03-29 00:00 |
18:51:27.44 |
-05:00:58.7 |
HIP 92654 |
25.47 |
| 2026-03-29 12:00 |
18:51:27.58 |
-05:00:48.0 |
HIP 92654 |
25.33 |
| 2026-03-30 00:00 |
18:51:27.70 |
-05:00:37.4 |
HIP 92654 |
25.20 |
| 2026-03-30 12:00 |
18:51:27.80 |
-05:00:26.7 |
HIP 92654 |
25.08 |
| 2026-03-31 00:00 |
18:51:27.87 |
-05:00:16.1 |
HIP 92654 |
24.96 |
| 2026-03-31 12:00 |
18:51:27.93 |
-05:00:05.6 |
HIP 92654 |
24.85 |
| 2026-04-01 00:00 |
18:51:27.95 |
-04:59:55.0 |
HIP 92654 |
24.74 |
| 2026-04-01 12:00 |
18:51:27.96 |
-04:59:44.5 |
HIP 92654 |
24.64 |
| 2026-04-02 00:00 |
18:51:27.94 |
-04:59:34.0 |
HIP 92654 |
24.55 |
| 2026-04-02 12:00 |
18:51:27.91 |
-04:59:23.5 |
HIP 92654 |
24.46 |
| 2026-04-03 00:00 |
18:51:27.84 |
-04:59:13.0 |
HIP 92654 |
24.38 |
| 2026-04-03 12:00 |
18:51:27.76 |
-04:59:02.6 |
HIP 92654 |
24.30 |
| 2026-04-04 00:00 |
18:51:27.65 |
-04:58:52.2 |
HIP 92654 |
24.23 |
| 2026-04-04 12:00 |
18:51:27.52 |
-04:58:41.8 |
HIP 92654 |
24.16 |
| 2026-04-05 00:00 |
18:51:27.37 |
-04:58:31.5 |
HIP 92654 |
24.10 |
| 2026-04-05 12:00 |
18:51:27.19 |
-04:58:21.2 |
HIP 92654 |
24.05 |
| 2026-04-06 00:00 |
18:51:27.00 |
-04:58:10.9 |
HIP 92654 |
24.00 |
| 2026-04-06 12:00 |
18:51:26.78 |
-04:58:00.7 |
HIP 92654 |
23.96 |
| 2026-04-07 00:00 |
18:51:26.53 |
-04:57:50.4 |
HIP 92654 |
23.93 |
| 2026-04-07 12:00 |
18:51:26.27 |
-04:57:40.3 |
HIP 92654 |
23.90 |
| 2026-04-08 00:00 |
18:51:25.98 |
-04:57:30.1 |
HIP 92654 |
23.88 |
| 2026-04-08 12:00 |
18:51:25.67 |
-04:57:20.0 |
HIP 92654 |
23.87 |
| 2026-04-09 00:00 |
18:51:25.33 |
-04:57:09.9 |
HIP 92654 |
23.86 |
| 2026-04-09 12:00 |
18:51:24.98 |
-04:57:00.0 |
HIP 92654 |
23.86 |
| 2026-04-10 00:00 |
18:51:24.60 |
-04:56:49.9 |
HIP 92654 |
23.86 |
| 2026-04-10 12:00 |
18:51:24.19 |
-04:56:40.0 |
HIP 92654 |
23.88 |
| 2026-04-11 00:00 |
18:51:23.77 |
-04:56:30.1 |
HIP 92654 |
23.90 |
| 2026-04-11 12:00 |
18:51:23.32 |
-04:56:20.2 |
HIP 92654 |
23.92 |
| 2026-04-12 00:00 |
18:51:22.85 |
-04:56:10.3 |
HIP 92654 |
23.96 |
| 2026-04-12 12:00 |
18:51:22.36 |
-04:56:00.6 |
HIP 92654 |
24.00 |
| 2026-04-13 00:00 |
18:51:21.84 |
-04:55:50.8 |
HIP 92654 |
24.05 |
| 2026-04-13 12:00 |
18:51:21.31 |
-04:55:41.1 |
HIP 92654 |
24.10 |
| 2026-04-14 00:00 |
18:51:20.75 |
-04:55:31.5 |
HIP 92654 |
24.16 |
| 2026-04-14 12:00 |
18:51:20.16 |
-04:55:21.9 |
HIP 92654 |
24.23 |
| 2026-04-15 00:00 |
18:51:19.56 |
-04:55:12.3 |
HIP 92654 |
24.31 |
| 2026-04-15 12:00 |
18:51:18.93 |
-04:55:02.8 |
HIP 92654 |
24.39 |
| 2026-04-16 00:00 |
18:51:18.28 |
-04:54:53.3 |
HIP 92654 |
24.48 |