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) |
| 2026-03-26 00:00 |
14:13:52.61 |
+25:45:37.6 |
HIP 69622 |
22.84 |
| 2026-03-26 12:00 |
14:13:32.50 |
+25:47:24.6 |
HIP 69622 |
27.26 |
| 2026-03-27 00:00 |
14:13:12.24 |
+25:49:10.0 |
HIP 69345 |
31.51 |
| 2026-03-27 12:00 |
14:12:51.84 |
+25:50:53.8 |
HIP 69345 |
27.15 |
| 2026-03-28 00:00 |
14:12:31.31 |
+25:52:35.9 |
HIP 69345 |
23.02 |
| 2026-03-28 12:00 |
14:12:10.65 |
+25:54:16.3 |
HIP 69345 |
19.27 |
| 2026-03-29 00:00 |
14:11:49.87 |
+25:55:55.0 |
HIP 69345 |
16.19 |
| 2026-03-29 12:00 |
14:11:28.95 |
+25:57:31.9 |
HIP 69345 |
14.24 |
| 2026-03-30 00:00 |
14:11:07.92 |
+25:59:07.1 |
HIP 69345 |
13.93 |
| 2026-03-30 12:00 |
14:10:46.76 |
+26:00:40.5 |
HIP 69345 |
15.36 |
| 2026-03-31 00:00 |
14:10:25.49 |
+26:02:12.1 |
HIP 69183 |
15.06 |
| 2026-03-31 12:00 |
14:10:04.10 |
+26:03:41.9 |
HIP 69183 |
13.86 |
| 2026-04-01 00:00 |
14:09:42.61 |
+26:05:09.9 |
HIP 69183 |
14.41 |
| 2026-04-01 12:00 |
14:09:21.00 |
+26:06:36.0 |
HIP 69183 |
16.53 |
| 2026-04-02 00:00 |
14:08:59.30 |
+26:08:00.2 |
HIP 69183 |
19.73 |
| 2026-04-02 12:00 |
14:08:37.49 |
+26:09:22.5 |
HIP 69183 |
23.59 |
| 2026-04-03 00:00 |
14:08:15.58 |
+26:10:42.9 |
HIP 69183 |
27.84 |
| 2026-04-03 12:00 |
14:07:53.58 |
+26:12:01.4 |
HIP 69183 |
32.33 |
| 2026-04-04 00:00 |
14:07:31.48 |
+26:13:17.9 |
HIP 68917 |
33.00 |
| 2026-04-04 12:00 |
14:07:09.29 |
+26:14:32.4 |
HIP 68917 |
32.54 |
| 2026-04-05 00:00 |
14:06:47.02 |
+26:15:44.9 |
HIP 68917 |
32.85 |
| 2026-04-05 12:00 |
14:06:24.67 |
+26:16:55.4 |
HIP 68764 |
32.52 |
| 2026-04-06 00:00 |
14:06:02.23 |
+26:18:03.9 |
HIP 68764 |
27.86 |
| 2026-04-06 12:00 |
14:05:39.72 |
+26:19:10.4 |
HIP 68764 |
23.43 |
| 2026-04-07 00:00 |
14:05:17.14 |
+26:20:14.8 |
HIP 68764 |
19.38 |
| 2026-04-07 12:00 |
14:04:54.48 |
+26:21:17.0 |
HIP 68764 |
16.01 |
| 2026-04-08 00:00 |
14:04:31.76 |
+26:22:17.2 |
HIP 68764 |
13.85 |
| 2026-04-08 12:00 |
14:04:08.98 |
+26:23:15.3 |
HIP 68764 |
13.49 |
| 2026-04-09 00:00 |
14:03:46.13 |
+26:24:11.3 |
HIP 68764 |
15.07 |
| 2026-04-09 12:00 |
14:03:23.23 |
+26:25:05.1 |
HIP 68764 |
18.09 |
| 2026-04-10 00:00 |
14:03:00.27 |
+26:25:56.7 |
HIP 68562 |
16.44 |
| 2026-04-10 12:00 |
14:02:37.27 |
+26:26:46.2 |
HIP 68562 |
12.64 |
| 2026-04-11 00:00 |
14:02:14.22 |
+26:27:33.4 |
HIP 68562 |
10.21 |
| 2026-04-11 12:00 |
14:01:51.12 |
+26:28:18.5 |
HIP 68562 |
10.20 |
| 2026-04-12 00:00 |
14:01:27.99 |
+26:29:01.3 |
HIP 68562 |
12.62 |
| 2026-04-12 12:00 |
14:01:04.81 |
+26:29:42.0 |
HIP 68562 |
16.42 |
| 2026-04-13 00:00 |
14:00:41.61 |
+26:30:20.3 |
HIP 68562 |
20.87 |
| 2026-04-13 12:00 |
14:00:18.38 |
+26:30:56.4 |
HIP 68562 |
25.63 |
| 2026-04-14 00:00 |
13:59:55.12 |
+26:31:30.3 |
HIP 68562 |
30.55 |
| 2026-04-14 12:00 |
13:59:31.83 |
+26:32:01.8 |
HIP 68169 |
30.08 |
| 2026-04-15 00:00 |
13:59:08.53 |
+26:32:31.1 |
HIP 68169 |
25.17 |
| 2026-04-15 12:00 |
13:58:45.22 |
+26:32:58.0 |
HIP 68169 |
20.39 |
| 2026-04-16 00:00 |
13:58:21.89 |
+26:33:22.7 |
HIP 68169 |
15.89 |