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) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 18:11:01.22 | -09:20:03.4 | HIP 89161 | 17.04 |
| 2026-07-29 12:00 | 18:10:47.69 | -09:21:37.7 | HIP 89161 | 18.42 |
| 2026-07-30 00:00 | 18:10:34.30 | -09:23:12.5 | HIP 89161 | 20.35 |
| 2026-07-30 12:00 | 18:10:21.05 | -09:24:47.6 | HIP 88924 | 18.43 |
| 2026-07-31 00:00 | 18:10:07.95 | -09:26:23.1 | HIP 88924 | 15.10 |
| 2026-07-31 12:00 | 18:09:55.00 | -09:27:58.9 | HIP 88924 | 11.95 |
| 2026-08-01 00:00 | 18:09:42.19 | -09:29:35.1 | HIP 88924 | 9.16 |
| 2026-08-01 12:00 | 18:09:29.53 | -09:31:11.6 | HIP 88924 | 7.12 |
| 2026-08-02 00:00 | 18:09:17.02 | -09:32:48.5 | HIP 88924 | 6.50 |
| 2026-08-02 12:00 | 18:09:04.67 | -09:34:25.7 | HIP 88924 | 7.62 |
| 2026-08-03 00:00 | 18:08:52.46 | -09:36:03.2 | HIP 88924 | 9.88 |
| 2026-08-03 12:00 | 18:08:40.41 | -09:37:41.0 | HIP 88872 | 10.44 |
| 2026-08-04 00:00 | 18:08:28.52 | -09:39:19.2 | HIP 88872 | 9.03 |
| 2026-08-04 12:00 | 18:08:16.78 | -09:40:57.6 | HIP 88872 | 8.72 |
| 2026-08-05 00:00 | 18:08:05.20 | -09:42:36.3 | HIP 88872 | 9.60 |
| 2026-08-05 12:00 | 18:07:53.78 | -09:44:15.4 | HIP 88872 | 11.36 |
| 2026-08-06 00:00 | 18:07:42.52 | -09:45:54.7 | HIP 88872 | 13.64 |
| 2026-08-06 12:00 | 18:07:31.42 | -09:47:34.2 | HIP 88872 | 16.21 |
| 2026-08-07 00:00 | 18:07:20.49 | -09:49:14.1 | HIP 88872 | 18.93 |
| 2026-08-07 12:00 | 18:07:09.72 | -09:50:54.2 | HIP 88872 | 21.73 |
| 2026-08-08 00:00 | 18:06:59.12 | -09:52:34.5 | HIP 88872 | 24.57 |
| 2026-08-08 12:00 | 18:06:48.68 | -09:54:15.1 | HIP 88872 | 27.43 |
| 2026-08-09 00:00 | 18:06:38.41 | -09:55:55.9 | HIP 88582 | 30.24 |
| 2026-08-09 12:00 | 18:06:28.31 | -09:57:37.0 | HIP 88582 | 29.79 |
| 2026-08-10 00:00 | 18:06:18.38 | -09:59:18.2 | HIP 88582 | 29.68 |
| 2026-08-10 12:00 | 18:06:08.63 | -10:00:59.7 | HIP 88582 | 29.88 |
| 2026-08-11 00:00 | 18:05:59.04 | -10:02:41.4 | HIP 88582 | 30.39 |
| 2026-08-11 12:00 | 18:05:49.63 | -10:04:23.3 | HIP 88582 | 31.18 |
| 2026-08-12 00:00 | 18:05:40.39 | -10:06:05.3 | HIP 88582 | 32.22 |
| 2026-08-12 12:00 | 18:05:31.33 | -10:07:47.6 | HIP 88582 | 33.47 |
| 2026-08-13 00:00 | 18:05:22.45 | -10:09:30.0 | HIP 88582 | 34.92 |
| 2026-08-13 12:00 | 18:05:13.74 | -10:11:12.6 | HIP 88582 | 36.52 |
| 2026-08-14 00:00 | 18:05:05.21 | -10:12:55.4 | HIP 88582 | 38.26 |
| 2026-08-14 12:00 | 18:04:56.86 | -10:14:38.2 | HIP 88335 | 38.39 |
| 2026-08-15 00:00 | 18:04:48.70 | -10:16:21.3 | HIP 88335 | 36.83 |
| 2026-08-15 12:00 | 18:04:40.71 | -10:18:04.4 | HIP 88335 | 35.45 |
| 2026-08-16 00:00 | 18:04:32.90 | -10:19:47.7 | HIP 88335 | 34.25 |
| 2026-08-16 12:00 | 18:04:25.27 | -10:21:31.1 | HIP 88502 | 33.13 |
| 2026-08-17 00:00 | 18:04:17.83 | -10:23:14.7 | HIP 88502 | 31.39 |
| 2026-08-17 12:00 | 18:04:10.57 | -10:24:58.3 | HIP 88502 | 29.76 |
| 2026-08-18 00:00 | 18:04:03.49 | -10:26:42.0 | HIP 88502 | 28.24 |
| 2026-08-18 12:00 | 18:03:56.60 | -10:28:25.8 | HIP 88502 | 26.85 |
| 2026-08-19 00:00 | 18:03:49.89 | -10:30:09.7 | HIP 88502 | 25.59 |