メタデータ
| 項目 |
値 |
| Designation |
226P/Pigott-LINEAR-Kowalski |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-09-04T12:35:50.089920Z |
| Orbit solution date (soln_date, UTC) |
2024-07-01T08:58:31Z |
| Obs used |
1679 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
21.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-03-24.0000000 |
| e |
0.52818078 |
| q (au) |
1.778058 |
| a (au) |
3.768516 |
| i (deg) |
44.003907 |
| Ω (om, deg) |
54.006950 |
| ω (w, deg) |
341.100239 |
| M (ma, deg) |
125.358382 |
等級
散乱 + 全体線形
$$
M_a = (10.651 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.651 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-07-26 |
2024-04-12 |
+17.6275 |
-4.597 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
13:50:58.14 |
+10:52:53.6 |
HIP 67449 |
29.21 |
| 2026-09-20 12:00 |
13:51:16.38 |
+10:49:29.1 |
HIP 67449 |
31.24 |
| 2026-09-21 00:00 |
13:51:34.67 |
+10:46:05.1 |
HIP 67449 |
34.11 |
| 2026-09-21 12:00 |
13:51:53.02 |
+10:42:41.6 |
HIP 67674 |
34.54 |
| 2026-09-22 00:00 |
13:52:11.41 |
+10:39:18.7 |
HIP 67674 |
31.52 |
| 2026-09-22 12:00 |
13:52:29.85 |
+10:35:56.3 |
HIP 67674 |
29.31 |
| 2026-09-23 00:00 |
13:52:48.34 |
+10:32:34.5 |
HIP 67862 |
25.07 |
| 2026-09-23 12:00 |
13:53:06.88 |
+10:29:13.2 |
HIP 67862 |
19.55 |
| 2026-09-24 00:00 |
13:53:25.47 |
+10:25:52.4 |
HIP 67862 |
14.13 |
| 2026-09-24 12:00 |
13:53:44.10 |
+10:22:32.2 |
HIP 67862 |
9.02 |
| 2026-09-25 00:00 |
13:54:02.78 |
+10:19:12.6 |
HIP 67882 |
4.70 |
| 2026-09-25 12:00 |
13:54:21.50 |
+10:15:53.5 |
HIP 67882 |
2.87 |
| 2026-09-26 00:00 |
13:54:40.27 |
+10:12:35.0 |
HIP 67882 |
7.68 |
| 2026-09-26 12:00 |
13:54:59.09 |
+10:09:17.0 |
HIP 67882 |
13.20 |
| 2026-09-27 00:00 |
13:55:17.94 |
+10:05:59.6 |
HIP 67882 |
18.83 |
| 2026-09-27 12:00 |
13:55:36.84 |
+10:02:42.8 |
HIP 67882 |
24.49 |
| 2026-09-28 00:00 |
13:55:55.78 |
+09:59:26.5 |
HIP 68094 |
20.68 |
| 2026-09-28 12:00 |
13:56:14.77 |
+09:56:10.9 |
HIP 68094 |
16.14 |
| 2026-09-29 00:00 |
13:56:33.79 |
+09:52:55.7 |
HIP 68094 |
12.60 |
| 2026-09-29 12:00 |
13:56:52.86 |
+09:49:41.2 |
HIP 68094 |
11.07 |
| 2026-09-30 00:00 |
13:57:11.96 |
+09:46:27.2 |
HIP 68094 |
12.32 |
| 2026-09-30 12:00 |
13:57:31.11 |
+09:43:13.9 |
HIP 68094 |
15.70 |
| 2026-10-01 00:00 |
13:57:50.29 |
+09:40:01.1 |
HIP 68094 |
20.18 |
| 2026-10-01 12:00 |
13:58:09.51 |
+09:36:48.8 |
HIP 68281 |
19.72 |
| 2026-10-02 00:00 |
13:58:28.77 |
+09:33:37.2 |
HIP 68281 |
15.27 |
| 2026-10-02 12:00 |
13:58:48.07 |
+09:30:26.2 |
HIP 68281 |
11.97 |
| 2026-10-03 00:00 |
13:59:07.40 |
+09:27:15.8 |
HIP 68281 |
10.91 |
| 2026-10-03 12:00 |
13:59:26.77 |
+09:24:05.9 |
HIP 68281 |
12.69 |
| 2026-10-04 00:00 |
13:59:46.18 |
+09:20:56.7 |
HIP 68281 |
16.40 |
| 2026-10-04 12:00 |
14:00:05.62 |
+09:17:48.1 |
HIP 68508 |
19.89 |
| 2026-10-05 00:00 |
14:00:25.09 |
+09:14:40.1 |
HIP 68508 |
15.43 |
| 2026-10-05 12:00 |
14:00:44.60 |
+09:11:32.7 |
HIP 68508 |
12.09 |
| 2026-10-06 00:00 |
14:01:04.14 |
+09:08:25.9 |
HIP 68508 |
10.95 |
| 2026-10-06 12:00 |
14:01:23.71 |
+09:05:19.8 |
HIP 68527 |
11.17 |
| 2026-10-07 00:00 |
14:01:43.32 |
+09:02:14.3 |
HIP 68527 |
6.84 |
| 2026-10-07 12:00 |
14:02:02.95 |
+08:59:09.4 |
HIP 68527 |
5.93 |
| 2026-10-08 00:00 |
14:02:22.62 |
+08:56:05.1 |
HIP 68527 |
9.47 |
| 2026-10-08 12:00 |
14:02:42.31 |
+08:53:01.5 |
HIP 68527 |
14.50 |
| 2026-10-09 00:00 |
14:03:02.03 |
+08:49:58.5 |
HIP 68527 |
19.93 |
| 2026-10-09 12:00 |
14:03:21.78 |
+08:46:56.2 |
HIP 68697 |
18.49 |
| 2026-10-10 00:00 |
14:03:41.56 |
+08:43:54.5 |
HIP 68697 |
14.69 |
| 2026-10-10 12:00 |
14:04:01.36 |
+08:40:53.5 |
HIP 68697 |
12.50 |
| 2026-10-11 00:00 |
14:04:21.19 |
+08:37:53.1 |
HIP 68697 |
12.77 |