メタデータ
| 項目 |
値 |
| Designation |
402P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-12-09T18:43:32.399040Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:49Z |
| Obs used |
2131 |
| 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) |
2013-02-18.0000000 |
| e |
0.43883859 |
| q (au) |
3.916225 |
| a (au) |
6.978785 |
| i (deg) |
30.894465 |
| Ω (om, deg) |
123.132102 |
| ω (w, deg) |
326.983777 |
| M (ma, deg) |
188.028800 |
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) |
| 2026-09-20 00:00 |
15:14:29.80 |
+10:52:13.0 |
HIP 74589 |
3.78 |
| 2026-09-20 12:00 |
15:14:41.29 |
+10:50:07.6 |
HIP 74589 |
3.98 |
| 2026-09-21 00:00 |
15:14:52.86 |
+10:48:02.6 |
HIP 74589 |
6.50 |
| 2026-09-21 12:00 |
15:15:04.49 |
+10:45:57.9 |
HIP 74589 |
9.68 |
| 2026-09-22 00:00 |
15:15:16.20 |
+10:43:53.5 |
HIP 74589 |
13.06 |
| 2026-09-22 12:00 |
15:15:27.97 |
+10:41:49.5 |
HIP 74718 |
13.14 |
| 2026-09-23 00:00 |
15:15:39.81 |
+10:39:45.8 |
HIP 74718 |
12.46 |
| 2026-09-23 12:00 |
15:15:51.71 |
+10:37:42.4 |
HIP 74718 |
12.77 |
| 2026-09-24 00:00 |
15:16:03.69 |
+10:35:39.4 |
HIP 74718 |
14.01 |
| 2026-09-24 12:00 |
15:16:15.73 |
+10:33:36.7 |
HIP 74718 |
15.97 |
| 2026-09-25 00:00 |
15:16:27.84 |
+10:31:34.4 |
HIP 74718 |
18.43 |
| 2026-09-25 12:00 |
15:16:40.01 |
+10:29:32.5 |
HIP 74718 |
21.22 |
| 2026-09-26 00:00 |
15:16:52.25 |
+10:27:30.9 |
HIP 74718 |
24.23 |
| 2026-09-26 12:00 |
15:17:04.55 |
+10:25:29.6 |
HIP 74930 |
23.96 |
| 2026-09-27 00:00 |
15:17:16.91 |
+10:23:28.8 |
HIP 74930 |
21.03 |
| 2026-09-27 12:00 |
15:17:29.34 |
+10:21:28.3 |
HIP 74931 |
18.35 |
| 2026-09-28 00:00 |
15:17:41.83 |
+10:19:28.2 |
HIP 74931 |
16.00 |
| 2026-09-28 12:00 |
15:17:54.39 |
+10:17:28.4 |
HIP 74931 |
14.20 |
| 2026-09-29 00:00 |
15:18:07.00 |
+10:15:29.1 |
HIP 74931 |
13.19 |
| 2026-09-29 12:00 |
15:18:19.68 |
+10:13:30.1 |
HIP 74931 |
13.16 |
| 2026-09-30 00:00 |
15:18:32.42 |
+10:11:31.5 |
HIP 74931 |
14.12 |
| 2026-09-30 12:00 |
15:18:45.22 |
+10:09:33.4 |
HIP 74931 |
15.91 |
| 2026-10-01 00:00 |
15:18:58.08 |
+10:07:35.6 |
HIP 74931 |
18.27 |
| 2026-10-01 12:00 |
15:19:11.00 |
+10:05:38.2 |
HIP 75009 |
15.80 |
| 2026-10-02 00:00 |
15:19:23.97 |
+10:03:41.3 |
HIP 75009 |
12.85 |
| 2026-10-02 12:00 |
15:19:37.01 |
+10:01:44.7 |
HIP 75009 |
10.44 |
| 2026-10-03 00:00 |
15:19:50.10 |
+09:59:48.6 |
HIP 75009 |
9.00 |
| 2026-10-03 12:00 |
15:20:03.25 |
+09:57:52.9 |
HIP 75009 |
9.03 |
| 2026-10-04 00:00 |
15:20:16.46 |
+09:55:57.6 |
HIP 75009 |
10.53 |
| 2026-10-04 12:00 |
15:20:29.73 |
+09:54:02.8 |
HIP 75009 |
13.01 |
| 2026-10-05 00:00 |
15:20:43.05 |
+09:52:08.4 |
HIP 75128 |
13.30 |
| 2026-10-05 12:00 |
15:20:56.43 |
+09:50:14.4 |
HIP 75128 |
13.98 |
| 2026-10-06 00:00 |
15:21:09.86 |
+09:48:20.8 |
HIP 75128 |
15.57 |
| 2026-10-06 12:00 |
15:21:23.34 |
+09:46:27.8 |
HIP 75128 |
17.85 |
| 2026-10-07 00:00 |
15:21:36.88 |
+09:44:35.1 |
HIP 75278 |
19.52 |
| 2026-10-07 12:00 |
15:21:50.47 |
+09:42:43.0 |
HIP 75278 |
15.69 |
| 2026-10-08 00:00 |
15:22:04.12 |
+09:40:51.3 |
HIP 75278 |
11.85 |
| 2026-10-08 12:00 |
15:22:17.82 |
+09:39:00.0 |
HIP 75278 |
8.02 |
| 2026-10-09 00:00 |
15:22:31.57 |
+09:37:09.3 |
HIP 75278 |
4.20 |
| 2026-10-09 12:00 |
15:22:45.37 |
+09:35:19.0 |
HIP 75278 |
0.87 |
| 2026-10-10 00:00 |
15:22:59.22 |
+09:33:29.2 |
HIP 75278 |
3.72 |
| 2026-10-10 12:00 |
15:23:13.12 |
+09:31:39.8 |
HIP 75278 |
7.55 |
| 2026-10-11 00:00 |
15:23:27.06 |
+09:29:51.0 |
HIP 75278 |
11.42 |