メタデータ
| 項目 |
値 |
| Designation |
26P/Grigg-Skjellerup |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-07-06T00:05:12.914880Z |
| Orbit solution date (soln_date, UTC) |
2024-10-11T15:43:03Z |
| Obs used |
511 |
| NEO |
Yes |
| M1 |
16.500 |
| K1 |
5.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-03-31.0000000 |
| e |
0.63966796 |
| q (au) |
1.089725 |
| a (au) |
3.024224 |
| i (deg) |
22.455114 |
| Ω (om, deg) |
211.633966 |
| ω (w, deg) |
1.896086 |
| M (ma, deg) |
273.417838 |
等級
散乱 + 全体線形
$$
M_a = (13.785 + 4.946\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.785 |
| n |
4.946 |
| gf |
0.975 |
| gb |
-0.927 |
| k |
0.996 |
| δ90 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
02:16:40.48 |
+14:12:11.2 |
HIP 10669 |
18.10 |
| 2026-06-01 12:00 |
02:17:02.65 |
+14:13:31.1 |
HIP 10669 |
14.86 |
| 2026-06-02 00:00 |
02:17:24.76 |
+14:14:50.5 |
HIP 10669 |
13.24 |
| 2026-06-02 12:00 |
02:17:46.82 |
+14:16:09.5 |
HIP 10727 |
12.54 |
| 2026-06-03 00:00 |
02:18:08.82 |
+14:17:28.1 |
HIP 10727 |
10.61 |
| 2026-06-03 12:00 |
02:18:30.76 |
+14:18:46.1 |
HIP 10727 |
11.33 |
| 2026-06-04 00:00 |
02:18:52.64 |
+14:20:03.7 |
HIP 10727 |
14.26 |
| 2026-06-04 12:00 |
02:19:14.46 |
+14:21:20.8 |
HIP 10895 |
14.74 |
| 2026-06-05 00:00 |
02:19:36.22 |
+14:22:37.4 |
HIP 10895 |
10.23 |
| 2026-06-05 12:00 |
02:19:57.92 |
+14:23:53.6 |
HIP 10895 |
7.12 |
| 2026-06-06 00:00 |
02:20:19.56 |
+14:25:09.2 |
HIP 10895 |
7.43 |
| 2026-06-06 12:00 |
02:20:41.13 |
+14:26:24.4 |
HIP 10895 |
10.83 |
| 2026-06-07 00:00 |
02:21:02.65 |
+14:27:39.0 |
HIP 10895 |
15.39 |
| 2026-06-07 12:00 |
02:21:24.09 |
+14:28:53.2 |
HIP 10895 |
20.32 |
| 2026-06-08 00:00 |
02:21:45.48 |
+14:30:06.8 |
HIP 10895 |
25.40 |
| 2026-06-08 12:00 |
02:22:06.79 |
+14:31:20.0 |
HIP 10895 |
30.54 |
| 2026-06-09 00:00 |
02:22:28.04 |
+14:32:32.6 |
HIP 10895 |
35.71 |
| 2026-06-09 12:00 |
02:22:49.23 |
+14:33:44.7 |
HIP 11298 |
38.37 |
| 2026-06-10 00:00 |
02:23:10.34 |
+14:34:56.3 |
HIP 11298 |
33.32 |
| 2026-06-10 12:00 |
02:23:31.39 |
+14:36:07.4 |
HIP 11298 |
28.37 |
| 2026-06-11 00:00 |
02:23:52.37 |
+14:37:17.9 |
HIP 11298 |
23.54 |
| 2026-06-11 12:00 |
02:24:13.27 |
+14:38:28.0 |
HIP 11298 |
18.94 |
| 2026-06-12 00:00 |
02:24:34.11 |
+14:39:37.4 |
HIP 11298 |
14.75 |
| 2026-06-12 12:00 |
02:24:54.87 |
+14:40:46.4 |
HIP 11298 |
11.40 |
| 2026-06-13 00:00 |
02:25:15.56 |
+14:41:54.8 |
HIP 11298 |
9.76 |
| 2026-06-13 12:00 |
02:25:36.18 |
+14:43:02.6 |
HIP 11298 |
10.64 |
| 2026-06-14 00:00 |
02:25:56.71 |
+14:44:09.9 |
HIP 11298 |
13.52 |
| 2026-06-14 12:00 |
02:26:17.18 |
+14:45:16.6 |
HIP 11298 |
17.43 |
| 2026-06-15 00:00 |
02:26:37.56 |
+14:46:22.8 |
HIP 11298 |
21.80 |
| 2026-06-15 12:00 |
02:26:57.87 |
+14:47:28.4 |
HIP 11512 |
21.37 |
| 2026-06-16 00:00 |
02:27:18.10 |
+14:48:33.4 |
HIP 11512 |
16.63 |
| 2026-06-16 12:00 |
02:27:38.25 |
+14:49:37.9 |
HIP 11512 |
12.11 |
| 2026-06-17 00:00 |
02:27:58.32 |
+14:50:41.7 |
HIP 11512 |
8.17 |
| 2026-06-17 12:00 |
02:28:18.30 |
+14:51:45.0 |
HIP 11512 |
6.03 |
| 2026-06-18 00:00 |
02:28:38.21 |
+14:52:47.8 |
HIP 11512 |
7.38 |
| 2026-06-18 12:00 |
02:28:58.03 |
+14:53:49.9 |
HIP 11512 |
10.98 |
| 2026-06-19 00:00 |
02:29:17.77 |
+14:54:51.4 |
HIP 11512 |
15.30 |
| 2026-06-19 12:00 |
02:29:37.42 |
+14:55:52.3 |
HIP 11512 |
19.85 |
| 2026-06-20 00:00 |
02:29:56.99 |
+14:56:52.7 |
HIP 11512 |
24.50 |
| 2026-06-20 12:00 |
02:30:16.47 |
+14:57:52.4 |
HIP 11619 |
25.50 |
| 2026-06-21 00:00 |
02:30:35.86 |
+14:58:51.6 |
HIP 11619 |
26.04 |
| 2026-06-21 12:00 |
02:30:55.16 |
+14:59:50.1 |
HIP 11827 |
26.88 |
| 2026-06-22 00:00 |
02:31:14.38 |
+15:00:48.0 |
HIP 11827 |
22.23 |