482P/PANSTARRS
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 482P/PANSTARRS |
| Type | P |
| Perihelion (tp_cal, UTC) | 2023-06-01T11:41:00.064320Z |
| Orbit solution date (soln_date, UTC) | 2024-05-14T12:42:42Z |
| Obs used | 97 |
| NEO | - |
| M1 | 17.000 |
| K1 | 4.500 |
| PC | - |
| Discovery observation (MPC, UTC) | 2014-11-10T09:56:26.880000Z |
| Discovery magnitude (MPC) | 20.20 i |
| Discovery observatory (MPC) | F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2022-03-17.0000000 |
| e | 0.49292758 |
| q (au) | 1.907487 |
| a (au) | 3.761765 |
| i (deg) | 24.516413 |
| Ω (om, deg) | 126.216135 |
| ω (w, deg) | 339.380217 |
| M (ma, deg) | 300.360460 |
等級
散乱 + 全体線形
$$ M_a = (15.788 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 15.788 |
| n | 2.000 |
| gf | 1.000 |
| gb | -1.000 |
| 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 |
|---|---|---|---|
| 2021-08-09 | 2022-12-22 | -1.3509 | +0.947 |
| 2024-01-20 | 2024-05-10 | +11.6926 | -5.860 |
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) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 18:51:15.42 | -07:34:10.4 | HIP 92510 | 13.83 |
| 2026-05-12 12:00 | 18:51:07.12 | -07:33:50.0 | HIP 92510 | 14.11 |
| 2026-05-13 00:00 | 18:50:58.64 | -07:33:30.4 | HIP 92510 | 14.68 |
| 2026-05-13 12:00 | 18:50:49.99 | -07:33:11.4 | HIP 92510 | 15.53 |
| 2026-05-14 00:00 | 18:50:41.15 | -07:32:53.1 | HIP 92510 | 16.63 |
| 2026-05-14 12:00 | 18:50:32.13 | -07:32:35.4 | HIP 92380 | 14.47 |
| 2026-05-15 00:00 | 18:50:22.94 | -07:32:18.5 | HIP 92380 | 12.24 |
| 2026-05-15 12:00 | 18:50:13.57 | -07:32:02.3 | HIP 92380 | 10.00 |
| 2026-05-16 00:00 | 18:50:04.03 | -07:31:46.8 | HIP 92380 | 7.77 |
| 2026-05-16 12:00 | 18:49:54.31 | -07:31:32.0 | HIP 92380 | 5.61 |
| 2026-05-17 00:00 | 18:49:44.42 | -07:31:17.9 | HIP 92380 | 3.75 |
| 2026-05-17 12:00 | 18:49:34.36 | -07:31:04.6 | HIP 92380 | 2.95 |
| 2026-05-18 00:00 | 18:49:24.12 | -07:30:52.0 | HIP 92380 | 4.00 |
| 2026-05-18 12:00 | 18:49:13.71 | -07:30:40.1 | HIP 92380 | 6.05 |
| 2026-05-19 00:00 | 18:49:03.14 | -07:30:29.0 | HIP 92380 | 8.44 |
| 2026-05-19 12:00 | 18:48:52.40 | -07:30:18.6 | HIP 92380 | 10.97 |
| 2026-05-20 00:00 | 18:48:41.49 | -07:30:09.0 | HIP 92380 | 13.59 |
| 2026-05-20 12:00 | 18:48:30.41 | -07:30:00.1 | HIP 92380 | 16.27 |
| 2026-05-21 00:00 | 18:48:19.17 | -07:29:52.0 | HIP 92380 | 19.01 |
| 2026-05-21 12:00 | 18:48:07.77 | -07:29:44.7 | HIP 92150 | 18.79 |
| 2026-05-22 00:00 | 18:47:56.21 | -07:29:38.1 | HIP 92150 | 16.08 |
| 2026-05-22 12:00 | 18:47:44.49 | -07:29:32.3 | HIP 92150 | 13.40 |
| 2026-05-23 00:00 | 18:47:32.61 | -07:29:27.3 | HIP 92150 | 10.79 |
| 2026-05-23 12:00 | 18:47:20.58 | -07:29:23.1 | HIP 92150 | 8.36 |
| 2026-05-24 00:00 | 18:47:08.39 | -07:29:19.7 | HIP 92150 | 6.39 |
| 2026-05-24 12:00 | 18:46:56.04 | -07:29:17.1 | HIP 92150 | 5.47 |
| 2026-05-25 00:00 | 18:46:43.55 | -07:29:15.2 | HIP 92150 | 6.15 |
| 2026-05-25 12:00 | 18:46:30.90 | -07:29:14.2 | HIP 92150 | 8.07 |
| 2026-05-26 00:00 | 18:46:18.10 | -07:29:13.9 | HIP 92150 | 10.61 |
| 2026-05-26 12:00 | 18:46:05.16 | -07:29:14.5 | HIP 92150 | 13.46 |
| 2026-05-27 00:00 | 18:45:52.06 | -07:29:15.8 | HIP 92150 | 16.46 |
| 2026-05-27 12:00 | 18:45:38.83 | -07:29:18.0 | HIP 91933 | 19.25 |
| 2026-05-28 00:00 | 18:45:25.45 | -07:29:21.0 | HIP 91933 | 16.25 |
| 2026-05-28 12:00 | 18:45:11.92 | -07:29:24.8 | HIP 91933 | 13.36 |
| 2026-05-29 00:00 | 18:44:58.26 | -07:29:29.4 | HIP 91933 | 10.72 |
| 2026-05-29 12:00 | 18:44:44.46 | -07:29:34.9 | HIP 91933 | 8.58 |
| 2026-05-30 00:00 | 18:44:30.52 | -07:29:41.2 | HIP 91933 | 7.45 |
| 2026-05-30 12:00 | 18:44:16.45 | -07:29:48.3 | HIP 91933 | 7.83 |
| 2026-05-31 00:00 | 18:44:02.24 | -07:29:56.2 | HIP 91933 | 9.57 |
| 2026-05-31 12:00 | 18:43:47.90 | -07:30:05.0 | HIP 91933 | 12.14 |
| 2026-06-01 00:00 | 18:43:33.43 | -07:30:14.6 | HIP 91867 | 13.85 |
| 2026-06-01 12:00 | 18:43:18.83 | -07:30:25.0 | HIP 91867 | 14.77 |
| 2026-06-02 00:00 | 18:43:04.10 | -07:30:36.3 | HIP 91728 | 15.45 |