メタデータ
| 項目 |
値 |
| Designation |
P/2005 T4 (SWAN) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-10-10T12:54:01.762560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:53Z |
| Obs used |
31 |
| NEO |
Yes |
| M1 |
15.400 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-10-24.0000000 |
| e |
0.93035203 |
| q (au) |
0.649400 |
| a (au) |
9.324030 |
| i (deg) |
160.036223 |
| Ω (om, deg) |
25.422511 |
| ω (w, deg) |
41.444068 |
| M (ma, deg) |
0.466041 |
等級
散乱 + 全体線形
$$
M_a = (14.853 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.853 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
09:58:38.71 |
-03:42:03.3 |
HIP 48897 |
4.66 |
| 2026-06-01 12:00 |
09:58:39.63 |
-03:41:39.4 |
HIP 48897 |
4.45 |
| 2026-06-02 00:00 |
09:58:40.60 |
-03:41:15.9 |
HIP 48897 |
4.29 |
| 2026-06-02 12:00 |
09:58:41.63 |
-03:40:52.8 |
HIP 48897 |
4.20 |
| 2026-06-03 00:00 |
09:58:42.72 |
-03:40:30.0 |
HIP 48897 |
4.17 |
| 2026-06-03 12:00 |
09:58:43.86 |
-03:40:07.7 |
HIP 48897 |
4.20 |
| 2026-06-04 00:00 |
09:58:45.06 |
-03:39:45.7 |
HIP 48897 |
4.30 |
| 2026-06-04 12:00 |
09:58:46.31 |
-03:39:24.1 |
HIP 48897 |
4.47 |
| 2026-06-05 00:00 |
09:58:47.62 |
-03:39:02.9 |
HIP 48897 |
4.69 |
| 2026-06-05 12:00 |
09:58:48.99 |
-03:38:42.1 |
HIP 48897 |
4.97 |
| 2026-06-06 00:00 |
09:58:50.41 |
-03:38:21.7 |
HIP 48897 |
5.29 |
| 2026-06-06 12:00 |
09:58:51.88 |
-03:38:01.7 |
HIP 48897 |
5.64 |
| 2026-06-07 00:00 |
09:58:53.42 |
-03:37:42.1 |
HIP 48897 |
6.04 |
| 2026-06-07 12:00 |
09:58:55.00 |
-03:37:22.9 |
HIP 48897 |
6.46 |
| 2026-06-08 00:00 |
09:58:56.64 |
-03:37:04.0 |
HIP 48897 |
6.90 |
| 2026-06-08 12:00 |
09:58:58.34 |
-03:36:45.6 |
HIP 48897 |
7.37 |
| 2026-06-09 00:00 |
09:59:00.09 |
-03:36:27.5 |
HIP 48897 |
7.85 |
| 2026-06-09 12:00 |
09:59:01.89 |
-03:36:09.9 |
HIP 48897 |
8.35 |
| 2026-06-10 00:00 |
09:59:03.74 |
-03:35:52.6 |
HIP 48897 |
8.87 |
| 2026-06-10 12:00 |
09:59:05.65 |
-03:35:35.8 |
HIP 48897 |
9.40 |
| 2026-06-11 00:00 |
09:59:07.62 |
-03:35:19.3 |
HIP 48897 |
9.95 |
| 2026-06-11 12:00 |
09:59:09.63 |
-03:35:03.3 |
HIP 48897 |
10.50 |
| 2026-06-12 00:00 |
09:59:11.70 |
-03:34:47.6 |
HIP 48897 |
11.07 |
| 2026-06-12 12:00 |
09:59:13.83 |
-03:34:32.3 |
HIP 48897 |
11.66 |
| 2026-06-13 00:00 |
09:59:16.00 |
-03:34:17.5 |
HIP 48897 |
12.25 |
| 2026-06-13 12:00 |
09:59:18.23 |
-03:34:03.0 |
HIP 48897 |
12.85 |
| 2026-06-14 00:00 |
09:59:20.51 |
-03:33:49.0 |
HIP 48897 |
13.46 |
| 2026-06-14 12:00 |
09:59:22.84 |
-03:33:35.3 |
HIP 48897 |
14.09 |
| 2026-06-15 00:00 |
09:59:25.22 |
-03:33:22.1 |
HIP 48897 |
14.72 |
| 2026-06-15 12:00 |
09:59:27.65 |
-03:33:09.2 |
HIP 48897 |
15.36 |
| 2026-06-16 00:00 |
09:59:30.13 |
-03:32:56.8 |
HIP 48897 |
16.02 |
| 2026-06-16 12:00 |
09:59:32.67 |
-03:32:44.8 |
HIP 48897 |
16.68 |
| 2026-06-17 00:00 |
09:59:35.25 |
-03:32:33.1 |
HIP 48897 |
17.35 |
| 2026-06-17 12:00 |
09:59:37.88 |
-03:32:21.9 |
HIP 48897 |
18.04 |
| 2026-06-18 00:00 |
09:59:40.57 |
-03:32:11.1 |
HIP 48897 |
18.73 |
| 2026-06-18 12:00 |
09:59:43.30 |
-03:32:00.7 |
HIP 48897 |
19.43 |
| 2026-06-19 00:00 |
09:59:46.08 |
-03:31:50.6 |
HIP 48897 |
20.14 |
| 2026-06-19 12:00 |
09:59:48.91 |
-03:31:41.0 |
HIP 48897 |
20.86 |
| 2026-06-20 00:00 |
09:59:51.79 |
-03:31:31.8 |
HIP 48897 |
21.59 |
| 2026-06-20 12:00 |
09:59:54.71 |
-03:31:23.0 |
HIP 48897 |
22.33 |
| 2026-06-21 00:00 |
09:59:57.69 |
-03:31:14.6 |
HIP 48897 |
23.08 |
| 2026-06-21 12:00 |
10:00:00.71 |
-03:31:06.6 |
HIP 48897 |
23.84 |
| 2026-06-22 00:00 |
10:00:03.77 |
-03:30:58.9 |
HIP 49077 |
24.01 |