235P/LINEAR
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 235P/LINEAR |
| Type | P |
| Perihelion (tp_cal, UTC) | 2018-03-16T13:43:20.599680Z |
| Orbit solution date (soln_date, UTC) | 2026-03-31T09:42:38Z |
| Obs used | 795 |
| NEO | - |
| M1 | 5.000 |
| K1 | 28.000 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2020-09-16.0000000 |
| e | 0.32026383 |
| q (au) | 2.704728 |
| a (au) | 3.979084 |
| i (deg) | 8.894181 |
| Ω (om, deg) | 203.781920 |
| ω (w, deg) | 333.458967 |
| M (ma, deg) | 113.547862 |
等級
散乱 + 全体線形
$$ M_a = (7.462 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 7.462 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.502 |
| 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 |
|---|---|---|---|
| 2024-11-21 | 2025-04-25 | +27.1924 | -8.485 |
| 2025-04-25 | 2026-03-27 | -1.7349 | +3.723 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
ファインディングチャート
天体暦
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 17:04:14.44 | -16:13:34.9 | HIP 83514 | 3.40 |
| 2026-03-26 12:00 | 17:04:41.80 | -16:10:44.2 | HIP 83514 | 9.33 |
| 2026-03-27 00:00 | 17:05:08.71 | -16:07:52.0 | HIP 83577 | 12.64 |
| 2026-03-27 12:00 | 17:05:35.16 | -16:04:58.4 | HIP 83577 | 13.94 |
| 2026-03-28 00:00 | 17:06:01.16 | -16:02:03.2 | HIP 83577 | 17.97 |
| 2026-03-28 12:00 | 17:06:26.71 | -15:59:06.5 | HIP 83577 | 23.26 |
| 2026-03-29 00:00 | 17:06:51.79 | -15:56:08.5 | HIP 83577 | 29.08 |
| 2026-03-29 12:00 | 17:07:16.42 | -15:53:08.9 | HIP 83695 | 29.85 |
| 2026-03-30 00:00 | 17:07:40.58 | -15:50:08.0 | HIP 83695 | 30.45 |
| 2026-03-30 12:00 | 17:08:04.28 | -15:47:05.7 | HIP 83695 | 32.30 |
| 2026-03-31 00:00 | 17:08:27.52 | -15:44:01.9 | HIP 84012 | 27.71 |
| 2026-03-31 12:00 | 17:08:50.28 | -15:40:56.9 | HIP 84012 | 22.38 |
| 2026-04-01 00:00 | 17:09:12.58 | -15:37:50.5 | HIP 84012 | 17.80 |
| 2026-04-01 12:00 | 17:09:34.40 | -15:34:42.7 | HIP 84012 | 14.57 |
| 2026-04-02 00:00 | 17:09:55.75 | -15:31:33.7 | HIP 84012 | 13.59 |
| 2026-04-02 12:00 | 17:10:16.62 | -15:28:23.3 | HIP 84012 | 15.19 |
| 2026-04-03 00:00 | 17:10:37.02 | -15:25:11.7 | HIP 84058 | 14.01 |
| 2026-04-03 12:00 | 17:10:56.93 | -15:21:58.9 | HIP 84058 | 9.18 |
| 2026-04-04 00:00 | 17:11:16.37 | -15:18:44.8 | HIP 84058 | 6.18 |
| 2026-04-04 12:00 | 17:11:35.32 | -15:15:29.6 | HIP 84058 | 7.43 |
| 2026-04-05 00:00 | 17:11:53.78 | -15:12:13.1 | HIP 84190 | 10.24 |
| 2026-04-05 12:00 | 17:12:11.76 | -15:08:55.5 | HIP 84190 | 5.69 |
| 2026-04-06 00:00 | 17:12:29.24 | -15:05:36.7 | HIP 84190 | 4.43 |
| 2026-04-06 12:00 | 17:12:46.24 | -15:02:16.8 | HIP 84190 | 8.00 |
| 2026-04-07 00:00 | 17:13:02.74 | -14:58:55.8 | HIP 84190 | 12.77 |
| 2026-04-07 12:00 | 17:13:18.75 | -14:55:33.7 | HIP 84190 | 17.73 |
| 2026-04-08 00:00 | 17:13:34.26 | -14:52:10.6 | HIP 84190 | 22.70 |
| 2026-04-08 12:00 | 17:13:49.28 | -14:48:46.4 | HIP 84402 | 25.94 |
| 2026-04-09 00:00 | 17:14:03.79 | -14:45:21.2 | HIP 84402 | 21.18 |
| 2026-04-09 12:00 | 17:14:17.80 | -14:41:55.1 | HIP 84402 | 16.60 |
| 2026-04-10 00:00 | 17:14:31.32 | -14:38:28.0 | HIP 84402 | 12.33 |
| 2026-04-10 12:00 | 17:14:44.32 | -14:34:59.9 | HIP 84402 | 8.70 |
| 2026-04-11 00:00 | 17:14:56.83 | -14:31:30.9 | HIP 84402 | 6.69 |
| 2026-04-11 12:00 | 17:15:08.82 | -14:28:01.1 | HIP 84402 | 7.56 |
| 2026-04-12 00:00 | 17:15:20.32 | -14:24:30.3 | HIP 84402 | 10.54 |
| 2026-04-12 12:00 | 17:15:31.30 | -14:20:58.8 | HIP 84402 | 14.32 |
| 2026-04-13 00:00 | 17:15:41.77 | -14:17:26.4 | HIP 84402 | 18.36 |
| 2026-04-13 12:00 | 17:15:51.74 | -14:13:53.3 | HIP 84402 | 22.49 |
| 2026-04-14 00:00 | 17:16:01.19 | -14:10:19.4 | HIP 84402 | 26.63 |
| 2026-04-14 12:00 | 17:16:10.13 | -14:06:44.8 | HIP 84402 | 30.77 |
| 2026-04-15 00:00 | 17:16:18.57 | -14:03:09.4 | HIP 84451 | 33.94 |
| 2026-04-15 12:00 | 17:16:26.49 | -13:59:33.5 | HIP 84451 | 30.79 |
| 2026-04-16 00:00 | 17:16:33.90 | -13:55:56.8 | HIP 84451 | 27.84 |