メタデータ
| 項目 |
値 |
| Designation |
41P/Tuttle-Giacobini-Kresak |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-04-12T18:04:18.526080Z |
| Orbit solution date (soln_date, UTC) |
2023-09-29T16:16:14Z |
| Obs used |
4300 |
| NEO |
Yes |
| M1 |
16.900 |
| 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) |
2017-04-14.0000000 |
| e |
0.66127330 |
| q (au) |
1.045043 |
| a (au) |
3.085209 |
| i (deg) |
9.228466 |
| Ω (om, deg) |
141.058972 |
| ω (w, deg) |
62.166743 |
| M (ma, deg) |
0.226802 |
等級
散乱 + 全体線形
$$
M_a = (11.530 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.530 |
| n |
6.000 |
| gf |
0.995 |
| gb |
-0.863 |
| k |
0.997 |
| 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) |
| 2026-03-26 00:00 |
02:13:05.67 |
+05:16:42.2 |
HIP 10333 |
5.73 |
| 2026-03-26 12:00 |
02:13:27.94 |
+05:18:58.6 |
HIP 10333 |
5.71 |
| 2026-03-27 00:00 |
02:13:50.28 |
+05:21:15.0 |
HIP 10333 |
10.22 |
| 2026-03-27 12:00 |
02:14:12.68 |
+05:23:31.2 |
HIP 10333 |
15.77 |
| 2026-03-28 00:00 |
02:14:35.15 |
+05:25:47.4 |
HIP 10333 |
21.60 |
| 2026-03-28 12:00 |
02:14:57.68 |
+05:28:03.5 |
HIP 10333 |
27.53 |
| 2026-03-29 00:00 |
02:15:20.28 |
+05:30:19.6 |
HIP 10678 |
30.55 |
| 2026-03-29 12:00 |
02:15:42.94 |
+05:32:35.5 |
HIP 10678 |
24.93 |
| 2026-03-30 00:00 |
02:16:05.66 |
+05:34:51.3 |
HIP 10678 |
19.59 |
| 2026-03-30 12:00 |
02:16:28.44 |
+05:37:07.1 |
HIP 10678 |
14.81 |
| 2026-03-31 00:00 |
02:16:51.29 |
+05:39:22.7 |
HIP 10678 |
11.38 |
| 2026-03-31 12:00 |
02:17:14.19 |
+05:41:38.2 |
HIP 10678 |
10.68 |
| 2026-04-01 00:00 |
02:17:37.15 |
+05:43:53.6 |
HIP 10678 |
13.19 |
| 2026-04-01 12:00 |
02:18:00.17 |
+05:46:08.9 |
HIP 10678 |
17.60 |
| 2026-04-02 00:00 |
02:18:23.25 |
+05:48:24.1 |
HIP 10678 |
22.83 |
| 2026-04-02 12:00 |
02:18:46.39 |
+05:50:39.1 |
HIP 10678 |
28.46 |
| 2026-04-03 00:00 |
02:19:09.59 |
+05:52:54.0 |
HIP 10957 |
31.55 |
| 2026-04-03 12:00 |
02:19:32.84 |
+05:55:08.8 |
HIP 10957 |
27.30 |
| 2026-04-04 00:00 |
02:19:56.15 |
+05:57:23.4 |
HIP 10957 |
23.90 |
| 2026-04-04 12:00 |
02:20:19.51 |
+05:59:37.9 |
HIP 10957 |
21.77 |
| 2026-04-05 00:00 |
02:20:42.93 |
+06:01:52.3 |
HIP 10957 |
21.31 |
| 2026-04-05 12:00 |
02:21:06.40 |
+06:04:06.5 |
HIP 10957 |
22.63 |
| 2026-04-06 00:00 |
02:21:29.93 |
+06:06:20.5 |
HIP 10957 |
25.46 |
| 2026-04-06 12:00 |
02:21:53.51 |
+06:08:34.4 |
HIP 11132 |
21.99 |
| 2026-04-07 00:00 |
02:22:17.14 |
+06:10:48.1 |
HIP 11132 |
18.01 |
| 2026-04-07 12:00 |
02:22:40.82 |
+06:13:01.7 |
HIP 11132 |
15.61 |
| 2026-04-08 00:00 |
02:23:04.56 |
+06:15:15.1 |
HIP 11132 |
15.55 |
| 2026-04-08 12:00 |
02:23:28.34 |
+06:17:28.3 |
HIP 11132 |
17.88 |
| 2026-04-09 00:00 |
02:23:52.18 |
+06:19:41.3 |
HIP 11151 |
17.61 |
| 2026-04-09 12:00 |
02:24:16.07 |
+06:21:54.2 |
HIP 11151 |
18.79 |
| 2026-04-10 00:00 |
02:24:40.00 |
+06:24:06.8 |
HIP 11151 |
21.83 |
| 2026-04-10 12:00 |
02:25:03.99 |
+06:26:19.3 |
HIP 11360 |
19.97 |
| 2026-04-11 00:00 |
02:25:28.02 |
+06:28:31.5 |
HIP 11360 |
16.23 |
| 2026-04-11 12:00 |
02:25:52.10 |
+06:30:43.6 |
HIP 11360 |
14.46 |
| 2026-04-12 00:00 |
02:26:16.23 |
+06:32:55.5 |
HIP 11360 |
15.36 |
| 2026-04-12 12:00 |
02:26:40.40 |
+06:35:07.1 |
HIP 11360 |
18.56 |
| 2026-04-13 00:00 |
02:27:04.62 |
+06:37:18.5 |
HIP 11360 |
23.12 |
| 2026-04-13 12:00 |
02:27:28.88 |
+06:39:29.8 |
HIP 11563 |
24.04 |
| 2026-04-14 00:00 |
02:27:53.19 |
+06:41:40.7 |
HIP 11563 |
17.63 |
| 2026-04-14 12:00 |
02:28:17.54 |
+06:43:51.5 |
HIP 11563 |
11.23 |
| 2026-04-15 00:00 |
02:28:41.93 |
+06:46:02.0 |
HIP 11563 |
4.90 |
| 2026-04-15 12:00 |
02:29:06.37 |
+06:48:12.3 |
HIP 11563 |
2.16 |
| 2026-04-16 00:00 |
02:29:30.84 |
+06:50:22.3 |
HIP 11563 |
8.28 |