メタデータ
| 項目 |
値 |
| Designation |
P/2011 W1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-01-22T12:56:24.720000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:58Z |
| Obs used |
171 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
19.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-01-08.0000000 |
| e |
0.28865156 |
| q (au) |
3.312061 |
| a (au) |
4.656031 |
| i (deg) |
3.718613 |
| Ω (om, deg) |
161.883715 |
| ω (w, deg) |
282.472848 |
| M (ma, deg) |
358.573670 |
等級
散乱 + 全体線形
$$
M_a = (8.152 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.152 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
16:42:51.70 |
-17:47:43.2 |
HIP 81724 |
18.68 |
| 2026-05-12 12:00 |
16:42:37.49 |
-17:47:06.5 |
HIP 81724 |
15.24 |
| 2026-05-13 00:00 |
16:42:23.21 |
-17:46:29.8 |
HIP 81724 |
11.79 |
| 2026-05-13 12:00 |
16:42:08.83 |
-17:45:53.1 |
HIP 81724 |
8.31 |
| 2026-05-14 00:00 |
16:41:54.37 |
-17:45:16.3 |
HIP 81724 |
4.81 |
| 2026-05-14 12:00 |
16:41:39.84 |
-17:44:39.5 |
HIP 81724 |
1.30 |
| 2026-05-15 00:00 |
16:41:25.22 |
-17:44:02.8 |
HIP 81724 |
2.24 |
| 2026-05-15 12:00 |
16:41:10.52 |
-17:43:26.0 |
HIP 81724 |
5.79 |
| 2026-05-16 00:00 |
16:40:55.76 |
-17:42:49.2 |
HIP 81724 |
9.36 |
| 2026-05-16 12:00 |
16:40:40.92 |
-17:42:12.5 |
HIP 81724 |
12.95 |
| 2026-05-17 00:00 |
16:40:26.01 |
-17:41:35.7 |
HIP 81724 |
16.55 |
| 2026-05-17 12:00 |
16:40:11.03 |
-17:40:59.0 |
HIP 81724 |
20.17 |
| 2026-05-18 00:00 |
16:39:55.99 |
-17:40:22.3 |
HIP 81724 |
23.80 |
| 2026-05-18 12:00 |
16:39:40.89 |
-17:39:45.6 |
HIP 81647 |
25.66 |
| 2026-05-19 00:00 |
16:39:25.73 |
-17:39:09.0 |
HIP 81647 |
27.45 |
| 2026-05-19 12:00 |
16:39:10.51 |
-17:38:32.4 |
HIP 81393 |
27.85 |
| 2026-05-20 00:00 |
16:38:55.24 |
-17:37:55.8 |
HIP 81393 |
24.27 |
| 2026-05-20 12:00 |
16:38:39.92 |
-17:37:19.3 |
HIP 81393 |
20.73 |
| 2026-05-21 00:00 |
16:38:24.54 |
-17:36:42.9 |
HIP 81393 |
17.25 |
| 2026-05-21 12:00 |
16:38:09.12 |
-17:36:06.5 |
HIP 81393 |
13.88 |
| 2026-05-22 00:00 |
16:37:53.66 |
-17:35:30.1 |
HIP 81393 |
10.74 |
| 2026-05-22 12:00 |
16:37:38.15 |
-17:34:53.9 |
HIP 81393 |
8.12 |
| 2026-05-23 00:00 |
16:37:22.60 |
-17:34:17.7 |
HIP 81393 |
6.68 |
| 2026-05-23 12:00 |
16:37:07.02 |
-17:33:41.6 |
HIP 81393 |
7.18 |
| 2026-05-24 00:00 |
16:36:51.40 |
-17:33:05.5 |
HIP 81393 |
9.33 |
| 2026-05-24 12:00 |
16:36:35.75 |
-17:32:29.6 |
HIP 81393 |
12.29 |
| 2026-05-25 00:00 |
16:36:20.07 |
-17:31:53.7 |
HIP 81393 |
15.62 |
| 2026-05-25 12:00 |
16:36:04.36 |
-17:31:18.0 |
HIP 81393 |
19.12 |
| 2026-05-26 00:00 |
16:35:48.63 |
-17:30:42.3 |
HIP 81393 |
22.73 |
| 2026-05-26 12:00 |
16:35:32.87 |
-17:30:06.8 |
HIP 81393 |
26.39 |
| 2026-05-27 00:00 |
16:35:17.09 |
-17:29:31.3 |
HIP 81393 |
30.10 |
| 2026-05-27 12:00 |
16:35:01.30 |
-17:28:56.0 |
HIP 81393 |
33.83 |
| 2026-05-28 00:00 |
16:34:45.49 |
-17:28:20.8 |
HIP 80998 |
33.59 |
| 2026-05-28 12:00 |
16:34:29.67 |
-17:27:45.7 |
HIP 80998 |
30.24 |
| 2026-05-29 00:00 |
16:34:13.83 |
-17:27:10.7 |
HIP 80998 |
27.02 |
| 2026-05-29 12:00 |
16:33:57.99 |
-17:26:35.9 |
HIP 80998 |
23.97 |
| 2026-05-30 00:00 |
16:33:42.14 |
-17:26:01.2 |
HIP 80998 |
21.17 |
| 2026-05-30 12:00 |
16:33:26.28 |
-17:25:26.7 |
HIP 80998 |
18.74 |
| 2026-05-31 00:00 |
16:33:10.43 |
-17:24:52.3 |
HIP 80998 |
16.82 |
| 2026-05-31 12:00 |
16:32:54.57 |
-17:24:18.1 |
HIP 80998 |
15.62 |
| 2026-06-01 00:00 |
16:32:38.72 |
-17:23:44.0 |
HIP 80998 |
15.30 |
| 2026-06-01 12:00 |
16:32:22.88 |
-17:23:10.1 |
HIP 80998 |
15.92 |
| 2026-06-02 00:00 |
16:32:07.04 |
-17:22:36.3 |
HIP 80998 |
17.37 |