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) |
| 2026-05-12 00:00 |
15:20:03.36 |
+17:26:55.8 |
HIP 75047 |
12.25 |
| 2026-05-12 12:00 |
15:19:51.58 |
+17:27:20.9 |
HIP 75047 |
13.22 |
| 2026-05-13 00:00 |
15:19:39.81 |
+17:27:44.7 |
HIP 75047 |
14.66 |
| 2026-05-13 12:00 |
15:19:28.04 |
+17:28:07.3 |
HIP 75047 |
16.45 |
| 2026-05-14 00:00 |
15:19:16.28 |
+17:28:28.6 |
HIP 75047 |
18.48 |
| 2026-05-14 12:00 |
15:19:04.53 |
+17:28:48.6 |
HIP 75047 |
20.69 |
| 2026-05-15 00:00 |
15:18:52.79 |
+17:29:07.3 |
HIP 75047 |
23.01 |
| 2026-05-15 12:00 |
15:18:41.06 |
+17:29:24.7 |
HIP 75047 |
25.43 |
| 2026-05-16 00:00 |
15:18:29.34 |
+17:29:40.9 |
HIP 75047 |
27.90 |
| 2026-05-16 12:00 |
15:18:17.63 |
+17:29:55.8 |
HIP 75047 |
30.42 |
| 2026-05-17 00:00 |
15:18:05.94 |
+17:30:09.4 |
HIP 74794 |
29.79 |
| 2026-05-17 12:00 |
15:17:54.27 |
+17:30:21.6 |
HIP 74794 |
28.75 |
| 2026-05-18 00:00 |
15:17:42.62 |
+17:30:32.6 |
HIP 74794 |
27.93 |
| 2026-05-18 12:00 |
15:17:30.99 |
+17:30:42.3 |
HIP 74794 |
27.35 |
| 2026-05-19 00:00 |
15:17:19.38 |
+17:30:50.7 |
HIP 74794 |
27.03 |
| 2026-05-19 12:00 |
15:17:07.80 |
+17:30:57.8 |
HIP 74794 |
26.97 |
| 2026-05-20 00:00 |
15:16:56.24 |
+17:31:03.6 |
HIP 74794 |
27.16 |
| 2026-05-20 12:00 |
15:16:44.71 |
+17:31:08.1 |
HIP 74794 |
27.61 |
| 2026-05-21 00:00 |
15:16:33.21 |
+17:31:11.3 |
HIP 74794 |
28.30 |
| 2026-05-21 12:00 |
15:16:21.74 |
+17:31:13.2 |
HIP 74794 |
29.21 |
| 2026-05-22 00:00 |
15:16:10.30 |
+17:31:13.8 |
HIP 74566 |
29.93 |
| 2026-05-22 12:00 |
15:15:58.89 |
+17:31:13.1 |
HIP 74566 |
27.28 |
| 2026-05-23 00:00 |
15:15:47.52 |
+17:31:11.2 |
HIP 74566 |
24.65 |
| 2026-05-23 12:00 |
15:15:36.19 |
+17:31:07.9 |
HIP 74566 |
22.04 |
| 2026-05-24 00:00 |
15:15:24.89 |
+17:31:03.3 |
HIP 74566 |
19.46 |
| 2026-05-24 12:00 |
15:15:13.63 |
+17:30:57.5 |
HIP 74566 |
16.91 |
| 2026-05-25 00:00 |
15:15:02.41 |
+17:30:50.4 |
HIP 74566 |
14.42 |
| 2026-05-25 12:00 |
15:14:51.24 |
+17:30:41.9 |
HIP 74566 |
12.00 |
| 2026-05-26 00:00 |
15:14:40.10 |
+17:30:32.2 |
HIP 74566 |
9.71 |
| 2026-05-26 12:00 |
15:14:29.01 |
+17:30:21.3 |
HIP 74566 |
7.65 |
| 2026-05-27 00:00 |
15:14:17.97 |
+17:30:09.0 |
HIP 74566 |
6.05 |
| 2026-05-27 12:00 |
15:14:06.97 |
+17:29:55.5 |
HIP 74566 |
5.33 |
| 2026-05-28 00:00 |
15:13:56.02 |
+17:29:40.7 |
HIP 74566 |
5.82 |
| 2026-05-28 12:00 |
15:13:45.12 |
+17:29:24.6 |
HIP 74566 |
7.26 |
| 2026-05-29 00:00 |
15:13:34.27 |
+17:29:07.3 |
HIP 74566 |
9.21 |
| 2026-05-29 12:00 |
15:13:23.48 |
+17:28:48.7 |
HIP 74566 |
11.41 |
| 2026-05-30 00:00 |
15:13:12.73 |
+17:28:28.8 |
HIP 74566 |
13.72 |
| 2026-05-30 12:00 |
15:13:02.04 |
+17:28:07.7 |
HIP 74566 |
16.11 |
| 2026-05-31 00:00 |
15:12:51.41 |
+17:27:45.3 |
HIP 74566 |
18.52 |
| 2026-05-31 12:00 |
15:12:40.83 |
+17:27:21.7 |
HIP 74566 |
20.96 |
| 2026-06-01 00:00 |
15:12:30.31 |
+17:26:56.8 |
HIP 74300 |
18.88 |
| 2026-06-01 12:00 |
15:12:19.85 |
+17:26:30.7 |
HIP 74300 |
16.35 |
| 2026-06-02 00:00 |
15:12:09.45 |
+17:26:03.4 |
HIP 74300 |
13.82 |