402P/LINEAR
メタデータ
| 項目 |
値 |
| Designation |
402P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-12-09T19:06:20.517120Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:24Z |
| Obs used |
2125 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
14.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-02-22.0000000 |
| e |
0.43884048 |
| q (au) |
3.916205 |
| a (au) |
6.978773 |
| i (deg) |
30.894646 |
| Ω (om, deg) |
123.131904 |
| ω (w, deg) |
326.984530 |
| M (ma, deg) |
188.241334 |
等級
散乱 + 全体線形
$$
M_a = (4.541 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.541 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.976 |
| 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 |
| 2020-08-24 |
2021-12-09 |
+8.2871 |
-5.052 |
| 2021-12-11 |
2024-06-10 |
+1.5638 |
-1.208 |
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) |
| 2026-02-03 00:00 |
15:33:48.77 |
+12:31:39.6 |
HIP 76257 |
30.94 |
| 2026-02-03 12:00 |
15:33:56.09 |
+12:33:02.3 |
HIP 76257 |
29.02 |
| 2026-02-04 00:00 |
15:34:03.28 |
+12:34:25.8 |
HIP 76257 |
27.14 |
| 2026-02-04 12:00 |
15:34:10.35 |
+12:35:49.9 |
HIP 76257 |
25.32 |
| 2026-02-05 00:00 |
15:34:17.31 |
+12:37:14.8 |
HIP 76257 |
23.56 |
| 2026-02-05 12:00 |
15:34:24.15 |
+12:38:40.4 |
HIP 76257 |
21.87 |
| 2026-02-06 00:00 |
15:34:30.86 |
+12:40:06.7 |
HIP 76257 |
20.28 |
| 2026-02-06 12:00 |
15:34:37.46 |
+12:41:33.7 |
HIP 76257 |
18.78 |
| 2026-02-07 00:00 |
15:34:43.93 |
+12:43:01.4 |
HIP 76257 |
17.42 |
| 2026-02-07 12:00 |
15:34:50.29 |
+12:44:29.7 |
HIP 76257 |
16.21 |
| 2026-02-08 00:00 |
15:34:56.52 |
+12:45:58.8 |
HIP 76257 |
15.18 |
| 2026-02-08 12:00 |
15:35:02.63 |
+12:47:28.5 |
HIP 76368 |
13.99 |
| 2026-02-09 00:00 |
15:35:08.61 |
+12:48:58.8 |
HIP 76368 |
11.96 |
| 2026-02-09 12:00 |
15:35:14.47 |
+12:50:29.8 |
HIP 76368 |
9.98 |
| 2026-02-10 00:00 |
15:35:20.21 |
+12:52:01.5 |
HIP 76368 |
8.07 |
| 2026-02-10 12:00 |
15:35:25.83 |
+12:53:33.8 |
HIP 76368 |
6.31 |
| 2026-02-11 00:00 |
15:35:31.31 |
+12:55:06.7 |
HIP 76368 |
4.81 |
| 2026-02-11 12:00 |
15:35:36.68 |
+12:56:40.3 |
HIP 76368 |
3.89 |
| 2026-02-12 00:00 |
15:35:41.92 |
+12:58:14.5 |
HIP 76368 |
3.95 |
| 2026-02-12 12:00 |
15:35:47.03 |
+12:59:49.2 |
HIP 76368 |
4.94 |
| 2026-02-13 00:00 |
15:35:52.01 |
+13:01:24.6 |
HIP 76368 |
6.44 |
| 2026-02-13 12:00 |
15:35:56.87 |
+13:03:00.6 |
HIP 76368 |
8.16 |
| 2026-02-14 00:00 |
15:36:01.60 |
+13:04:37.2 |
HIP 76368 |
9.98 |
| 2026-02-14 12:00 |
15:36:06.20 |
+13:06:14.3 |
HIP 76368 |
11.85 |
| 2026-02-15 00:00 |
15:36:10.67 |
+13:07:52.0 |
HIP 76368 |
13.75 |
| 2026-02-15 12:00 |
15:36:15.01 |
+13:09:30.3 |
HIP 76368 |
15.66 |
| 2026-02-16 00:00 |
15:36:19.23 |
+13:11:09.1 |
HIP 76368 |
17.57 |
| 2026-02-16 12:00 |
15:36:23.32 |
+13:12:48.5 |
HIP 76368 |
19.48 |
| 2026-02-17 00:00 |
15:36:27.27 |
+13:14:28.3 |
HIP 76368 |
21.40 |
| 2026-02-17 12:00 |
15:36:31.10 |
+13:16:08.8 |
HIP 76494 |
22.80 |
| 2026-02-18 00:00 |
15:36:34.79 |
+13:17:49.7 |
HIP 76494 |
20.91 |
| 2026-02-18 12:00 |
15:36:38.36 |
+13:19:31.1 |
HIP 76494 |
19.03 |
| 2026-02-19 00:00 |
15:36:41.79 |
+13:21:13.0 |
HIP 76494 |
17.17 |
| 2026-02-19 12:00 |
15:36:45.09 |
+13:22:55.5 |
HIP 76494 |
15.34 |
| 2026-02-20 00:00 |
15:36:48.26 |
+13:24:38.3 |
HIP 76494 |
13.53 |
| 2026-02-20 12:00 |
15:36:51.30 |
+13:26:21.7 |
HIP 76494 |
11.77 |
| 2026-02-21 00:00 |
15:36:54.21 |
+13:28:05.5 |
HIP 76494 |
10.06 |
| 2026-02-21 12:00 |
15:36:56.98 |
+13:29:49.7 |
HIP 76494 |
8.44 |
| 2026-02-22 00:00 |
15:36:59.63 |
+13:31:34.4 |
HIP 76494 |
6.98 |
| 2026-02-22 12:00 |
15:37:02.14 |
+13:33:19.5 |
HIP 76494 |
5.77 |
| 2026-02-23 00:00 |
15:37:04.51 |
+13:35:05.0 |
HIP 76494 |
5.02 |
| 2026-02-23 12:00 |
15:37:06.76 |
+13:36:50.9 |
HIP 76494 |
4.92 |
| 2026-02-24 00:00 |
15:37:08.87 |
+13:38:37.2 |
HIP 76494 |
5.51 |