メタデータ
| 項目 |
値 |
| Designation |
245P/WISE |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-02-04T12:53:48.733440Z |
| Orbit solution date (soln_date, UTC) |
2022-02-14T01:12:50Z |
| Obs used |
103 |
| NEO |
- |
| M1 |
17.400 |
| 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) |
2009-08-05.0000000 |
| e |
0.46614825 |
| q (au) |
2.139432 |
| a (au) |
4.007539 |
| i (deg) |
21.087839 |
| Ω (om, deg) |
318.527206 |
| ω (w, deg) |
316.399919 |
| M (ma, deg) |
337.451800 |
等級
散乱 + 全体線形
$$
M_a = (16.407 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.407 |
| n |
2.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
21:34:46.84 |
-26:25:53.4 |
HIP 106555 |
18.26 |
| 2026-05-12 12:00 |
21:35:21.12 |
-26:21:04.4 |
HIP 106555 |
15.30 |
| 2026-05-13 00:00 |
21:35:55.02 |
-26:16:15.5 |
HIP 106654 |
6.95 |
| 2026-05-13 12:00 |
21:36:28.56 |
-26:11:26.9 |
HIP 106654 |
4.13 |
| 2026-05-14 00:00 |
21:37:01.72 |
-26:06:38.5 |
HIP 106654 |
11.97 |
| 2026-05-14 12:00 |
21:37:34.51 |
-26:01:50.4 |
HIP 106654 |
20.58 |
| 2026-05-15 00:00 |
21:38:06.92 |
-25:57:02.6 |
HIP 106654 |
29.23 |
| 2026-05-15 12:00 |
21:38:38.95 |
-25:52:15.1 |
HIP 106826 |
26.33 |
| 2026-05-16 00:00 |
21:39:10.60 |
-25:47:27.9 |
HIP 106826 |
24.78 |
| 2026-05-16 12:00 |
21:39:41.87 |
-25:42:41.0 |
HIP 106826 |
26.06 |
| 2026-05-17 00:00 |
21:40:12.75 |
-25:37:54.4 |
HIP 106975 |
24.77 |
| 2026-05-17 12:00 |
21:40:43.25 |
-25:33:08.2 |
HIP 106975 |
22.45 |
| 2026-05-18 00:00 |
21:41:13.35 |
-25:28:22.3 |
HIP 106975 |
23.08 |
| 2026-05-18 12:00 |
21:41:43.07 |
-25:23:36.8 |
HIP 107112 |
17.54 |
| 2026-05-19 00:00 |
21:42:12.40 |
-25:18:51.6 |
HIP 107112 |
14.07 |
| 2026-05-19 12:00 |
21:42:41.33 |
-25:14:06.8 |
HIP 107112 |
14.83 |
| 2026-05-20 00:00 |
21:43:09.87 |
-25:09:22.3 |
HIP 107112 |
19.22 |
| 2026-05-20 12:00 |
21:43:38.02 |
-25:04:38.3 |
HIP 107351 |
15.89 |
| 2026-05-21 00:00 |
21:44:05.76 |
-24:59:54.6 |
HIP 107351 |
8.04 |
| 2026-05-21 12:00 |
21:44:33.11 |
-24:55:11.3 |
HIP 107351 |
0.59 |
| 2026-05-22 00:00 |
21:45:00.06 |
-24:50:28.5 |
HIP 107351 |
7.51 |
| 2026-05-22 12:00 |
21:45:26.60 |
-24:45:46.0 |
HIP 107484 |
11.04 |
| 2026-05-23 00:00 |
21:45:52.75 |
-24:41:04.0 |
HIP 107484 |
9.20 |
| 2026-05-23 12:00 |
21:46:18.48 |
-24:36:22.4 |
HIP 107484 |
12.72 |
| 2026-05-24 00:00 |
21:46:43.81 |
-24:31:41.2 |
HIP 107484 |
18.70 |
| 2026-05-24 12:00 |
21:47:08.74 |
-24:27:00.5 |
HIP 107484 |
25.40 |
| 2026-05-25 00:00 |
21:47:33.25 |
-24:22:20.2 |
HIP 107641 |
20.86 |
| 2026-05-25 12:00 |
21:47:57.36 |
-24:17:40.3 |
HIP 107641 |
14.68 |
| 2026-05-26 00:00 |
21:48:21.05 |
-24:13:00.9 |
HIP 107641 |
9.97 |
| 2026-05-26 12:00 |
21:48:44.32 |
-24:08:22.0 |
HIP 107641 |
9.15 |
| 2026-05-27 00:00 |
21:49:07.19 |
-24:03:43.6 |
HIP 107641 |
12.86 |
| 2026-05-27 12:00 |
21:49:29.63 |
-23:59:05.6 |
HIP 107641 |
18.48 |
| 2026-05-28 00:00 |
21:49:51.66 |
-23:54:28.1 |
HIP 107818 |
19.39 |
| 2026-05-28 12:00 |
21:50:13.26 |
-23:49:51.2 |
HIP 107691 |
21.38 |
| 2026-05-29 00:00 |
21:50:34.44 |
-23:45:14.7 |
HIP 107691 |
23.89 |
| 2026-05-29 12:00 |
21:50:55.20 |
-23:40:38.7 |
HIP 107877 |
25.32 |
| 2026-05-30 00:00 |
21:51:15.53 |
-23:36:03.3 |
HIP 107877 |
19.93 |
| 2026-05-30 12:00 |
21:51:35.43 |
-23:31:28.4 |
HIP 107877 |
15.46 |
| 2026-05-31 00:00 |
21:51:54.91 |
-23:26:54.0 |
HIP 107877 |
12.77 |
| 2026-05-31 12:00 |
21:52:13.95 |
-23:22:20.1 |
HIP 107877 |
12.91 |
| 2026-06-01 00:00 |
21:52:32.56 |
-23:17:46.9 |
HIP 107877 |
15.73 |
| 2026-06-01 12:00 |
21:52:50.73 |
-23:13:14.1 |
HIP 107877 |
20.06 |
| 2026-06-02 00:00 |
21:53:08.46 |
-23:08:41.9 |
HIP 107877 |
25.07 |