235P/LINEAR
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 235P/LINEAR |
| Type | P |
| Perihelion (tp_cal, UTC) | 2025-12-19T08:08:22.093440Z |
| Orbit solution date (soln_date, UTC) | 2026-09-21T07:12:14Z |
| Obs used | 2053 |
| NEO | - |
| M1 | 6.300 |
| K1 | 23.500 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-03-22.0000000 |
| e | 0.42917545 |
| q (au) | 1.977838 |
| a (au) | 3.464879 |
| i (deg) | 9.915894 |
| Ω (om, deg) | 200.768630 |
| ω (w, deg) | 351.040131 |
| M (ma, deg) | 262.603696 |
等級
散乱 + 全体線形
$$ M_a = (7.947 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 7.947 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.848 |
| k | 0.999 |
| 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 | 2025-12-14 | +23.0217 | -8.608 |
| 2025-12-20 | 2026-09-08 | +4.1735 | -1.467 |
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) |
|---|---|---|---|---|
| 2026-09-20 00:00 | 17:18:42.67 | -13:09:02.2 | HIP 84823 | 21.65 |
| 2026-09-20 12:00 | 17:19:17.22 | -13:10:52.8 | HIP 84823 | 13.42 |
| 2026-09-21 00:00 | 17:19:51.92 | -13:12:42.8 | HIP 84823 | 6.26 |
| 2026-09-21 12:00 | 17:20:26.76 | -13:14:31.9 | HIP 84823 | 6.92 |
| 2026-09-22 00:00 | 17:21:01.75 | -13:16:20.3 | HIP 84895 | 11.22 |
| 2026-09-22 12:00 | 17:21:36.89 | -13:18:08.0 | HIP 84895 | 15.76 |
| 2026-09-23 00:00 | 17:22:12.17 | -13:19:55.0 | HIP 84895 | 22.90 |
| 2026-09-23 12:00 | 17:22:47.59 | -13:21:41.1 | HIP 85092 | 24.42 |
| 2026-09-24 00:00 | 17:23:23.14 | -13:23:26.5 | HIP 85208 | 20.14 |
| 2026-09-24 12:00 | 17:23:58.84 | -13:25:11.1 | HIP 85208 | 13.00 |
| 2026-09-25 00:00 | 17:24:34.68 | -13:26:55.0 | HIP 85208 | 9.45 |
| 2026-09-25 12:00 | 17:25:10.65 | -13:28:38.0 | HIP 85208 | 12.94 |
| 2026-09-26 00:00 | 17:25:46.76 | -13:30:20.2 | HIP 85208 | 20.13 |
| 2026-09-26 12:00 | 17:26:23.00 | -13:32:01.7 | HIP 85410 | 17.32 |
| 2026-09-27 00:00 | 17:26:59.37 | -13:33:42.3 | HIP 85410 | 14.46 |
| 2026-09-27 12:00 | 17:27:35.87 | -13:35:22.2 | HIP 85410 | 16.74 |
| 2026-09-28 00:00 | 17:28:12.50 | -13:37:01.2 | HIP 85410 | 22.69 |
| 2026-09-28 12:00 | 17:28:49.26 | -13:38:39.4 | HIP 85562 | 26.54 |
| 2026-09-29 00:00 | 17:29:26.15 | -13:40:16.7 | HIP 85562 | 24.98 |
| 2026-09-29 12:00 | 17:30:03.16 | -13:41:53.3 | HIP 85691 | 23.21 |
| 2026-09-30 00:00 | 17:30:40.29 | -13:43:29.0 | HIP 85691 | 22.66 |
| 2026-09-30 12:00 | 17:31:17.56 | -13:45:03.8 | HIP 85691 | 25.62 |
| 2026-10-01 00:00 | 17:31:54.94 | -13:46:37.8 | HIP 85871 | 22.30 |
| 2026-10-01 12:00 | 17:32:32.44 | -13:48:10.9 | HIP 85871 | 19.76 |
| 2026-10-02 00:00 | 17:33:10.07 | -13:49:43.2 | HIP 85871 | 21.32 |
| 2026-10-02 12:00 | 17:33:47.82 | -13:51:14.6 | HIP 85939 | 20.97 |
| 2026-10-03 00:00 | 17:34:25.68 | -13:52:45.1 | HIP 86049 | 17.69 |
| 2026-10-03 12:00 | 17:35:03.66 | -13:54:14.8 | HIP 86049 | 16.01 |
| 2026-10-04 00:00 | 17:35:41.76 | -13:55:43.5 | HIP 86049 | 19.34 |
| 2026-10-04 12:00 | 17:36:19.98 | -13:57:11.4 | HIP 86222 | 13.23 |
| 2026-10-05 00:00 | 17:36:58.31 | -13:58:38.4 | HIP 86222 | 3.88 |
| 2026-10-05 12:00 | 17:37:36.75 | -14:00:04.5 | HIP 86222 | 5.71 |
| 2026-10-06 00:00 | 17:38:15.31 | -14:01:29.6 | HIP 86279 | 9.03 |
| 2026-10-06 12:00 | 17:38:53.98 | -14:02:53.9 | HIP 86279 | 16.83 |
| 2026-10-07 00:00 | 17:39:32.76 | -14:04:17.2 | HIP 86524 | 22.58 |
| 2026-10-07 12:00 | 17:40:11.64 | -14:05:39.6 | HIP 86524 | 14.16 |
| 2026-10-08 00:00 | 17:40:50.64 | -14:07:01.1 | HIP 86524 | 8.51 |
| 2026-10-08 12:00 | 17:41:29.75 | -14:08:21.6 | HIP 86524 | 11.30 |
| 2026-10-09 00:00 | 17:42:08.96 | -14:09:41.2 | HIP 86524 | 19.16 |
| 2026-10-09 12:00 | 17:42:48.28 | -14:10:59.8 | HIP 86524 | 28.15 |
| 2026-10-10 00:00 | 17:43:27.70 | -14:12:17.5 | HIP 86524 | 37.47 |
| 2026-10-10 12:00 | 17:44:07.22 | -14:13:34.2 | HIP 86966 | 33.27 |
| 2026-10-11 00:00 | 17:44:46.84 | -14:14:49.9 | HIP 86966 | 24.61 |