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) |
| 2026-05-12 00:00 |
02:51:24.50 |
+08:35:43.7 |
HIP 13303 |
18.61 |
| 2026-05-12 12:00 |
02:51:50.28 |
+08:37:35.2 |
HIP 13422 |
15.02 |
| 2026-05-13 00:00 |
02:52:16.06 |
+08:39:26.2 |
HIP 13422 |
9.06 |
| 2026-05-13 12:00 |
02:52:41.85 |
+08:41:16.7 |
HIP 13422 |
5.17 |
| 2026-05-14 00:00 |
02:53:07.65 |
+08:43:06.8 |
HIP 13422 |
7.70 |
| 2026-05-14 12:00 |
02:53:33.45 |
+08:44:56.4 |
HIP 13422 |
13.41 |
| 2026-05-15 00:00 |
02:53:59.27 |
+08:46:45.6 |
HIP 13422 |
19.70 |
| 2026-05-15 12:00 |
02:54:25.08 |
+08:48:34.3 |
HIP 13422 |
26.16 |
| 2026-05-16 00:00 |
02:54:50.91 |
+08:50:22.5 |
HIP 13422 |
32.69 |
| 2026-05-16 12:00 |
02:55:16.73 |
+08:52:10.3 |
HIP 13690 |
30.14 |
| 2026-05-17 00:00 |
02:55:42.56 |
+08:53:57.6 |
HIP 13690 |
25.74 |
| 2026-05-17 12:00 |
02:56:08.40 |
+08:55:44.4 |
HIP 13690 |
22.48 |
| 2026-05-18 00:00 |
02:56:34.23 |
+08:57:30.7 |
HIP 13690 |
20.88 |
| 2026-05-18 12:00 |
02:57:00.07 |
+08:59:16.5 |
HIP 13690 |
21.32 |
| 2026-05-19 00:00 |
02:57:25.90 |
+09:01:01.8 |
HIP 13690 |
23.68 |
| 2026-05-19 12:00 |
02:57:51.74 |
+09:02:46.7 |
HIP 13690 |
27.48 |
| 2026-05-20 00:00 |
02:58:17.57 |
+09:04:31.0 |
HIP 13954 |
23.35 |
| 2026-05-20 12:00 |
02:58:43.40 |
+09:06:14.8 |
HIP 13954 |
18.84 |
| 2026-05-21 00:00 |
02:59:09.24 |
+09:07:58.2 |
HIP 13977 |
13.55 |
| 2026-05-21 12:00 |
02:59:35.06 |
+09:09:41.0 |
HIP 13977 |
6.97 |
| 2026-05-22 00:00 |
03:00:00.89 |
+09:11:23.3 |
HIP 13977 |
0.86 |
| 2026-05-22 12:00 |
03:00:26.71 |
+09:13:05.1 |
HIP 13977 |
6.31 |
| 2026-05-23 00:00 |
03:00:52.52 |
+09:14:46.4 |
HIP 13977 |
12.88 |
| 2026-05-23 12:00 |
03:01:18.33 |
+09:16:27.2 |
HIP 13977 |
19.45 |
| 2026-05-24 00:00 |
03:01:44.13 |
+09:18:07.4 |
HIP 13977 |
26.03 |
| 2026-05-24 12:00 |
03:02:09.93 |
+09:19:47.1 |
HIP 13977 |
32.61 |
| 2026-05-25 00:00 |
03:02:35.71 |
+09:21:26.3 |
HIP 14274 |
28.01 |
| 2026-05-25 12:00 |
03:03:01.49 |
+09:23:05.0 |
HIP 14274 |
22.34 |
| 2026-05-26 00:00 |
03:03:27.27 |
+09:24:43.1 |
HIP 14274 |
17.34 |
| 2026-05-26 12:00 |
03:03:53.03 |
+09:26:20.8 |
HIP 14274 |
13.72 |
| 2026-05-27 00:00 |
03:04:18.78 |
+09:27:57.8 |
HIP 14274 |
12.73 |
| 2026-05-27 12:00 |
03:04:44.52 |
+09:29:34.4 |
HIP 14274 |
14.89 |
| 2026-05-28 00:00 |
03:05:10.26 |
+09:31:10.4 |
HIP 14274 |
19.17 |
| 2026-05-28 12:00 |
03:05:35.98 |
+09:32:45.8 |
HIP 14274 |
24.47 |
| 2026-05-29 00:00 |
03:06:01.69 |
+09:34:20.7 |
HIP 14274 |
30.25 |
| 2026-05-29 12:00 |
03:06:27.38 |
+09:35:55.1 |
HIP 14274 |
36.28 |
| 2026-05-30 00:00 |
03:06:53.07 |
+09:37:28.9 |
HIP 14630 |
31.76 |
| 2026-05-30 12:00 |
03:07:18.74 |
+09:39:02.2 |
HIP 14630 |
25.27 |
| 2026-05-31 00:00 |
03:07:44.39 |
+09:40:34.9 |
HIP 14630 |
18.80 |
| 2026-05-31 12:00 |
03:08:10.03 |
+09:42:07.0 |
HIP 14630 |
12.37 |
| 2026-06-01 00:00 |
03:08:35.66 |
+09:43:38.6 |
HIP 14630 |
6.12 |
| 2026-06-01 12:00 |
03:09:01.27 |
+09:45:09.6 |
HIP 14630 |
2.47 |
| 2026-06-02 00:00 |
03:09:26.86 |
+09:46:40.1 |
HIP 14630 |
7.68 |