24P/Schaumasse
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 24P/Schaumasse |
| Type | P |
| Perihelion (tp_cal, UTC) | 2026-01-08T13:25:18.690240Z |
| Orbit solution date (soln_date, UTC) | 2026-07-07T05:58:32Z |
| Obs used | 3535 |
| NEO | Yes |
| M1 | 14.600 |
| K1 | 8.000 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-01-12.0000000 |
| e | 0.70790955 |
| q (au) | 1.184637 |
| a (au) | 4.055720 |
| i (deg) | 11.502329 |
| Ω (om, deg) | 78.287931 |
| ω (w, deg) | 58.479106 |
| M (ma, deg) | 272.204866 |
等級
散乱 + 全体線形
$$ M_a = (12.002 + 5.083\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 12.002 |
| n | 5.083 |
| gf | 1.000 |
| gb | -0.823 |
| k | 0.962 |
| 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 |
|---|---|---|---|
| 2025-01-22 | 2025-09-18 | -43.2765 | +14.566 |
| 2025-09-18 | 2026-01-08 | +22.8991 | -2.986 |
| 2026-01-09 | 2026-05-12 | +10.6698 | -2.456 |
| 2026-05-12 | 2026-07-13 | -9.2778 | +2.781 |
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 | 14:41:37.79 | -12:28:27.8 | HIP 71823 | 14.81 |
| 2026-07-29 12:00 | 14:42:05.08 | -12:32:36.6 | HIP 71823 | 13.29 |
| 2026-07-30 00:00 | 14:42:32.52 | -12:36:44.8 | HIP 71823 | 16.06 |
| 2026-07-30 12:00 | 14:43:00.12 | -12:40:52.5 | HIP 71823 | 21.55 |
| 2026-07-31 00:00 | 14:43:27.88 | -12:44:59.6 | HIP 71823 | 28.25 |
| 2026-07-31 12:00 | 14:43:55.79 | -12:49:06.2 | HIP 71823 | 35.49 |
| 2026-08-01 00:00 | 14:44:23.85 | -12:53:12.1 | HIP 72174 | 37.54 |
| 2026-08-01 12:00 | 14:44:52.07 | -12:57:17.5 | HIP 72174 | 38.27 |
| 2026-08-02 00:00 | 14:45:20.43 | -13:01:22.3 | HIP 72347 | 34.14 |
| 2026-08-02 12:00 | 14:45:48.94 | -13:05:26.5 | HIP 72347 | 28.37 |
| 2026-08-03 00:00 | 14:46:17.60 | -13:09:30.1 | HIP 72347 | 23.92 |
| 2026-08-03 12:00 | 14:46:46.41 | -13:13:33.2 | HIP 72347 | 21.65 |
| 2026-08-04 00:00 | 14:47:15.36 | -13:17:35.7 | HIP 72347 | 22.26 |
| 2026-08-04 12:00 | 14:47:44.45 | -13:21:37.6 | HIP 72442 | 21.34 |
| 2026-08-05 00:00 | 14:48:13.68 | -13:25:39.0 | HIP 72442 | 20.38 |
| 2026-08-05 12:00 | 14:48:43.06 | -13:29:39.7 | HIP 72553 | 18.51 |
| 2026-08-06 00:00 | 14:49:12.58 | -13:33:39.9 | HIP 72553 | 11.74 |
| 2026-08-06 12:00 | 14:49:42.23 | -13:37:39.5 | HIP 72553 | 8.24 |
| 2026-08-07 00:00 | 14:50:12.03 | -13:41:38.5 | HIP 72553 | 11.56 |
| 2026-08-07 12:00 | 14:50:41.96 | -13:45:36.9 | HIP 72650 | 12.11 |
| 2026-08-08 00:00 | 14:51:12.02 | -13:49:34.8 | HIP 72716 | 12.84 |
| 2026-08-08 12:00 | 14:51:42.22 | -13:53:32.1 | HIP 72716 | 9.79 |
| 2026-08-09 00:00 | 14:52:12.56 | -13:57:28.8 | HIP 72716 | 12.87 |
| 2026-08-09 12:00 | 14:52:43.02 | -14:01:24.9 | HIP 72716 | 19.37 |
| 2026-08-10 00:00 | 14:53:13.62 | -14:05:20.4 | HIP 72716 | 26.94 |
| 2026-08-10 12:00 | 14:53:44.35 | -14:09:15.4 | HIP 73064 | 34.76 |
| 2026-08-11 00:00 | 14:54:15.21 | -14:13:09.8 | HIP 73064 | 30.50 |
| 2026-08-11 12:00 | 14:54:46.20 | -14:17:03.6 | HIP 73064 | 28.17 |
| 2026-08-12 00:00 | 14:55:17.32 | -14:20:56.7 | HIP 73064 | 28.28 |
| 2026-08-12 12:00 | 14:55:48.56 | -14:24:49.3 | HIP 73064 | 30.80 |
| 2026-08-13 00:00 | 14:56:19.93 | -14:28:41.4 | HIP 73187 | 30.78 |
| 2026-08-13 12:00 | 14:56:51.42 | -14:32:32.8 | HIP 73187 | 23.80 |
| 2026-08-14 00:00 | 14:57:23.04 | -14:36:23.6 | HIP 73187 | 18.22 |
| 2026-08-14 12:00 | 14:57:54.77 | -14:40:13.8 | HIP 73187 | 15.64 |
| 2026-08-15 00:00 | 14:58:26.63 | -14:44:03.4 | HIP 73187 | 17.47 |
| 2026-08-15 12:00 | 14:58:58.61 | -14:47:52.4 | HIP 73416 | 18.55 |
| 2026-08-16 00:00 | 14:59:30.70 | -14:51:40.8 | HIP 73416 | 13.03 |
| 2026-08-16 12:00 | 15:00:02.91 | -14:55:28.6 | HIP 73416 | 12.03 |
| 2026-08-17 00:00 | 15:00:35.23 | -14:59:15.8 | HIP 73416 | 16.43 |
| 2026-08-17 12:00 | 15:01:07.67 | -15:03:02.3 | HIP 73416 | 23.36 |
| 2026-08-18 00:00 | 15:01:40.22 | -15:06:48.3 | HIP 73613 | 16.51 |
| 2026-08-18 12:00 | 15:02:12.89 | -15:10:33.6 | HIP 73613 | 11.13 |
| 2026-08-19 00:00 | 15:02:45.66 | -15:14:18.2 | HIP 73613 | 11.30 |