173P/Mueller 5
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 173P/Mueller 5 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2008-05-15T15:31:24.496320Z |
| Orbit solution date (soln_date, UTC) | 2023-06-30T22:18:07Z |
| Obs used | 1194 |
| NEO | - |
| M1 | 12.100 |
| K1 | 4.500 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2012-02-21.0000000 |
| e | 0.26135639 |
| q (au) | 4.203777 |
| a (au) | 5.691211 |
| i (deg) | 16.505508 |
| Ω (om, deg) | 100.496504 |
| ω (w, deg) | 29.393323 |
| M (ma, deg) | 99.914136 |
等級
散乱 + 全体線形
$$ M_a = (13.418 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 13.418 |
| n | 2.000 |
| gf | 0.999 |
| gb | -0.612 |
| k | 0.800 |
| δ90 | 9.998 |
| 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 |
|---|---|---|---|
| 2018-10-31 | 2020-03-17 | -28.6764 | +18.841 |
| 2020-03-17 | 2023-04-15 | +26.0210 | -18.793 |
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) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 18:14:36.51 | -19:50:47.8 | HIP 89262 | 24.38 |
| 2026-06-01 12:00 | 18:14:23.87 | -19:51:15.4 | HIP 89262 | 21.65 |
| 2026-06-02 00:00 | 18:14:11.16 | -19:51:43.1 | HIP 89262 | 18.98 |
| 2026-06-02 12:00 | 18:13:58.36 | -19:52:10.9 | HIP 89262 | 16.43 |
| 2026-06-03 00:00 | 18:13:45.48 | -19:52:38.9 | HIP 89262 | 14.06 |
| 2026-06-03 12:00 | 18:13:32.52 | -19:53:07.0 | HIP 89262 | 11.99 |
| 2026-06-04 00:00 | 18:13:19.49 | -19:53:35.2 | HIP 89262 | 10.43 |
| 2026-06-04 12:00 | 18:13:06.39 | -19:54:03.6 | HIP 89262 | 9.65 |
| 2026-06-05 00:00 | 18:12:53.21 | -19:54:32.1 | HIP 89262 | 9.85 |
| 2026-06-05 12:00 | 18:12:39.96 | -19:55:00.7 | HIP 89262 | 10.98 |
| 2026-06-06 00:00 | 18:12:26.64 | -19:55:29.5 | HIP 89262 | 12.82 |
| 2026-06-06 12:00 | 18:12:13.25 | -19:55:58.3 | HIP 89114 | 14.79 |
| 2026-06-07 00:00 | 18:11:59.80 | -19:56:27.3 | HIP 89114 | 12.14 |
| 2026-06-07 12:00 | 18:11:46.28 | -19:56:56.4 | HIP 89114 | 9.80 |
| 2026-06-08 00:00 | 18:11:32.70 | -19:57:25.7 | HIP 89114 | 8.10 |
| 2026-06-08 12:00 | 18:11:19.06 | -19:57:55.0 | HIP 89114 | 7.47 |
| 2026-06-09 00:00 | 18:11:05.36 | -19:58:24.5 | HIP 89114 | 8.20 |
| 2026-06-09 12:00 | 18:10:51.61 | -19:58:54.1 | HIP 89114 | 10.00 |
| 2026-06-10 00:00 | 18:10:37.80 | -19:59:23.7 | HIP 89114 | 12.43 |
| 2026-06-10 12:00 | 18:10:23.94 | -19:59:53.5 | HIP 89114 | 15.19 |
| 2026-06-11 00:00 | 18:10:10.03 | -20:00:23.4 | HIP 89114 | 18.15 |
| 2026-06-11 12:00 | 18:09:56.07 | -20:00:53.5 | HIP 88879 | 18.02 |
| 2026-06-12 00:00 | 18:09:42.06 | -20:01:23.6 | HIP 88879 | 14.71 |
| 2026-06-12 12:00 | 18:09:28.01 | -20:01:53.8 | HIP 88879 | 11.40 |
| 2026-06-13 00:00 | 18:09:13.91 | -20:02:24.1 | HIP 88879 | 8.10 |
| 2026-06-13 12:00 | 18:08:59.78 | -20:02:54.5 | HIP 88879 | 4.86 |
| 2026-06-14 00:00 | 18:08:45.61 | -20:03:25.1 | HIP 88879 | 2.04 |
| 2026-06-14 12:00 | 18:08:31.40 | -20:03:55.7 | HIP 88879 | 2.72 |
| 2026-06-15 00:00 | 18:08:17.16 | -20:04:26.4 | HIP 88879 | 5.79 |
| 2026-06-15 12:00 | 18:08:02.89 | -20:04:57.2 | HIP 88879 | 9.09 |
| 2026-06-16 00:00 | 18:07:48.58 | -20:05:28.1 | HIP 88879 | 12.44 |
| 2026-06-16 12:00 | 18:07:34.25 | -20:05:59.1 | HIP 88879 | 15.82 |
| 2026-06-17 00:00 | 18:07:19.90 | -20:06:30.2 | HIP 88879 | 19.22 |
| 2026-06-17 12:00 | 18:07:05.52 | -20:07:01.3 | HIP 88796 | 19.68 |
| 2026-06-18 00:00 | 18:06:51.12 | -20:07:32.6 | HIP 88796 | 20.62 |
| 2026-06-18 12:00 | 18:06:36.71 | -20:08:03.9 | HIP 88796 | 22.05 |
| 2026-06-19 00:00 | 18:06:22.28 | -20:08:35.3 | HIP 88796 | 23.90 |
| 2026-06-19 12:00 | 18:06:07.83 | -20:09:06.8 | HIP 88615 | 25.20 |
| 2026-06-20 00:00 | 18:05:53.37 | -20:09:38.3 | HIP 88615 | 24.84 |
| 2026-06-20 12:00 | 18:05:38.91 | -20:10:10.0 | HIP 88615 | 24.95 |
| 2026-06-21 00:00 | 18:05:24.43 | -20:10:41.7 | HIP 88615 | 25.53 |
| 2026-06-21 12:00 | 18:05:09.95 | -20:11:13.5 | HIP 88615 | 26.55 |
| 2026-06-22 00:00 | 18:04:55.47 | -20:11:45.3 | HIP 88615 | 27.95 |