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 |
0.998 |
| 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) |
| 2026-05-12 00:00 |
02:01:14.86 |
+13:13:14.7 |
HIP 9405 |
11.67 |
| 2026-05-12 12:00 |
02:01:38.75 |
+13:14:50.2 |
HIP 9463 |
13.55 |
| 2026-05-13 00:00 |
02:02:02.61 |
+13:16:25.4 |
HIP 9533 |
14.51 |
| 2026-05-13 12:00 |
02:02:26.45 |
+13:18:00.3 |
HIP 9533 |
10.80 |
| 2026-05-14 00:00 |
02:02:50.25 |
+13:19:34.9 |
HIP 9533 |
9.75 |
| 2026-05-14 12:00 |
02:03:14.02 |
+13:21:09.2 |
HIP 9533 |
12.05 |
| 2026-05-15 00:00 |
02:03:37.76 |
+13:22:43.1 |
HIP 9533 |
16.34 |
| 2026-05-15 12:00 |
02:04:01.46 |
+13:24:16.7 |
HIP 9533 |
21.44 |
| 2026-05-16 00:00 |
02:04:25.13 |
+13:25:49.9 |
HIP 9782 |
20.61 |
| 2026-05-16 12:00 |
02:04:48.77 |
+13:27:22.8 |
HIP 9782 |
15.73 |
| 2026-05-17 00:00 |
02:05:12.37 |
+13:28:55.4 |
HIP 9782 |
11.87 |
| 2026-05-17 12:00 |
02:05:35.93 |
+13:30:27.6 |
HIP 9782 |
10.26 |
| 2026-05-18 00:00 |
02:05:59.46 |
+13:31:59.5 |
HIP 9828 |
8.48 |
| 2026-05-18 12:00 |
02:06:22.95 |
+13:33:31.0 |
HIP 9828 |
6.02 |
| 2026-05-19 00:00 |
02:06:46.40 |
+13:35:02.1 |
HIP 9828 |
8.38 |
| 2026-05-19 12:00 |
02:07:09.81 |
+13:36:32.9 |
HIP 9828 |
13.17 |
| 2026-05-20 00:00 |
02:07:33.19 |
+13:38:03.2 |
HIP 9828 |
18.60 |
| 2026-05-20 12:00 |
02:07:56.52 |
+13:39:33.2 |
HIP 9828 |
24.22 |
| 2026-05-21 00:00 |
02:08:19.81 |
+13:41:02.9 |
HIP 9828 |
29.92 |
| 2026-05-21 12:00 |
02:08:43.06 |
+13:42:32.1 |
HIP 10175 |
31.36 |
| 2026-05-22 00:00 |
02:09:06.26 |
+13:44:01.0 |
HIP 10175 |
25.86 |
| 2026-05-22 12:00 |
02:09:29.43 |
+13:45:29.4 |
HIP 10175 |
20.55 |
| 2026-05-23 00:00 |
02:09:52.54 |
+13:46:57.5 |
HIP 10175 |
15.62 |
| 2026-05-23 12:00 |
02:10:15.62 |
+13:48:25.1 |
HIP 10175 |
11.53 |
| 2026-05-24 00:00 |
02:10:38.65 |
+13:49:52.4 |
HIP 10175 |
9.44 |
| 2026-05-24 12:00 |
02:11:01.63 |
+13:51:19.3 |
HIP 10175 |
10.58 |
| 2026-05-25 00:00 |
02:11:24.57 |
+13:52:45.7 |
HIP 10175 |
14.17 |
| 2026-05-25 12:00 |
02:11:47.46 |
+13:54:11.7 |
HIP 10300 |
13.41 |
| 2026-05-26 00:00 |
02:12:10.30 |
+13:55:37.4 |
HIP 10300 |
7.86 |
| 2026-05-26 12:00 |
02:12:33.10 |
+13:57:02.5 |
HIP 10300 |
3.01 |
| 2026-05-27 00:00 |
02:12:55.84 |
+13:58:27.3 |
HIP 10300 |
4.64 |
| 2026-05-27 12:00 |
02:13:18.54 |
+13:59:51.7 |
HIP 10300 |
9.93 |
| 2026-05-28 00:00 |
02:13:41.19 |
+14:01:15.6 |
HIP 10300 |
15.48 |
| 2026-05-28 12:00 |
02:14:03.78 |
+14:02:39.1 |
HIP 10300 |
21.09 |
| 2026-05-29 00:00 |
02:14:26.33 |
+14:04:02.1 |
HIP 10300 |
26.70 |
| 2026-05-29 12:00 |
02:14:48.82 |
+14:05:24.8 |
HIP 10300 |
32.30 |
| 2026-05-30 00:00 |
02:15:11.26 |
+14:06:46.9 |
HIP 10353 |
35.65 |
| 2026-05-30 12:00 |
02:15:33.65 |
+14:08:08.7 |
HIP 10669 |
31.95 |
| 2026-05-31 00:00 |
02:15:55.98 |
+14:09:29.9 |
HIP 10669 |
26.97 |
| 2026-05-31 12:00 |
02:16:18.26 |
+14:10:50.8 |
HIP 10669 |
22.27 |
| 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 |