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
$$ M_a = (12.026 + 4.988\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 12.026 |
| n | 4.988 |
| gf | 1.000 |
| gb | -0.821 |
| k | 0.963 |
| 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 | -43.1123 | +14.547 |
| 2025-09-18 | 2026-01-08 | +23.0799 | -3.009 |
| 2026-01-09 | 2026-05-09 | +11.1977 | -2.534 |
| 2026-05-09 | 2026-08-02 | -10.8254 | +3.253 |
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 | 15:40:50.30 | -18:51:11.4 | HIP 76768 | 10.77 |
| 2026-09-20 12:00 | 15:41:28.39 | -18:54:12.4 | HIP 76768 | 18.88 |
| 2026-09-21 00:00 | 15:42:06.53 | -18:57:12.7 | HIP 76937 | 22.09 |
| 2026-09-21 12:00 | 15:42:44.74 | -19:00:12.2 | HIP 76937 | 23.83 |
| 2026-09-22 00:00 | 15:43:23.00 | -19:03:11.1 | HIP 77124 | 28.01 |
| 2026-09-22 12:00 | 15:44:01.31 | -19:06:09.2 | HIP 77165 | 19.50 |
| 2026-09-23 00:00 | 15:44:39.68 | -19:09:06.6 | HIP 77165 | 10.77 |
| 2026-09-23 12:00 | 15:45:18.10 | -19:12:03.2 | HIP 77165 | 5.78 |
| 2026-09-24 00:00 | 15:45:56.58 | -19:14:59.1 | HIP 77231 | 7.68 |
| 2026-09-24 12:00 | 15:46:35.10 | -19:17:54.3 | HIP 77231 | 7.17 |
| 2026-09-25 00:00 | 15:47:13.68 | -19:20:48.8 | HIP 77231 | 15.04 |
| 2026-09-25 12:00 | 15:47:52.31 | -19:23:42.5 | HIP 77434 | 24.04 |
| 2026-09-26 00:00 | 15:48:30.99 | -19:26:35.5 | HIP 77434 | 19.89 |
| 2026-09-26 12:00 | 15:49:09.72 | -19:29:27.7 | HIP 77434 | 19.91 |
| 2026-09-27 00:00 | 15:49:48.50 | -19:32:19.2 | HIP 77561 | 23.85 |
| 2026-09-27 12:00 | 15:50:27.33 | -19:35:10.0 | HIP 77561 | 21.21 |
| 2026-09-28 00:00 | 15:51:06.21 | -19:38:00.0 | HIP 77561 | 22.69 |
| 2026-09-28 12:00 | 15:51:45.14 | -19:40:49.3 | HIP 77561 | 27.64 |
| 2026-09-29 00:00 | 15:52:24.11 | -19:43:37.9 | HIP 77813 | 23.85 |
| 2026-09-29 12:00 | 15:53:03.13 | -19:46:25.7 | HIP 77813 | 22.92 |
| 2026-09-30 00:00 | 15:53:42.20 | -19:49:12.8 | HIP 77811 | 21.45 |
| 2026-09-30 12:00 | 15:54:21.31 | -19:51:59.2 | HIP 77811 | 23.07 |
| 2026-10-01 00:00 | 15:55:00.47 | -19:54:44.8 | HIP 77811 | 28.10 |
| 2026-10-01 12:00 | 15:55:39.68 | -19:57:29.6 | HIP 78082 | 31.39 |
| 2026-10-02 00:00 | 15:56:18.93 | -20:00:13.8 | HIP 78082 | 25.96 |
| 2026-10-02 12:00 | 15:56:58.23 | -20:02:57.2 | HIP 78082 | 23.40 |
| 2026-10-03 00:00 | 15:57:37.57 | -20:05:39.8 | HIP 78082 | 24.63 |
| 2026-10-03 12:00 | 15:58:16.95 | -20:08:21.7 | HIP 78082 | 29.18 |
| 2026-10-04 00:00 | 15:58:56.38 | -20:11:02.9 | HIP 78420 | 28.11 |
| 2026-10-04 12:00 | 15:59:35.85 | -20:13:43.3 | HIP 78420 | 19.23 |
| 2026-10-05 00:00 | 16:00:15.37 | -20:16:23.0 | HIP 78420 | 11.62 |
| 2026-10-05 12:00 | 16:00:54.92 | -20:19:01.9 | HIP 78420 | 9.29 |
| 2026-10-06 00:00 | 16:01:34.52 | -20:21:40.1 | HIP 78420 | 14.97 |
| 2026-10-06 12:00 | 16:02:14.16 | -20:24:17.5 | HIP 78622 | 12.14 |
| 2026-10-07 00:00 | 16:02:53.84 | -20:26:54.2 | HIP 78622 | 2.57 |
| 2026-10-07 12:00 | 16:03:33.57 | -20:29:30.1 | HIP 78622 | 7.23 |
| 2026-10-08 00:00 | 16:04:13.33 | -20:32:05.3 | HIP 78769 | 16.36 |
| 2026-10-08 12:00 | 16:04:53.13 | -20:34:39.7 | HIP 78843 | 13.47 |
| 2026-10-09 00:00 | 16:05:32.97 | -20:37:13.4 | HIP 78843 | 10.41 |
| 2026-10-09 12:00 | 16:06:12.84 | -20:39:46.3 | HIP 78933 | 8.33 |
| 2026-10-10 00:00 | 16:06:52.76 | -20:42:18.5 | HIP 78933 | 2.38 |
| 2026-10-10 12:00 | 16:07:32.71 | -20:44:49.9 | HIP 78990 | 7.55 |
| 2026-10-11 00:00 | 16:08:12.69 | -20:47:20.5 | HIP 79085 | 5.52 |