24P/Schaumasse
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 24P/Schaumasse |
| Type | P |
| Perihelion (tp_cal, UTC) | 2026-01-08T23:13:06.237120Z |
| Orbit solution date (soln_date, UTC) | 2026-03-31T14:04:45Z |
| Obs used | 2497 |
| NEO | Yes |
| M1 | 14.300 |
| K1 | 10.500 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2023-01-21.0000000 |
| e | 0.70771586 |
| q (au) | 1.185268 |
| a (au) | 4.055190 |
| i (deg) | 11.504925 |
| Ω (om, deg) | 78.339132 |
| ω (w, deg) | 58.440492 |
| M (ma, deg) | 229.171178 |
等級
散乱 + 全体線形
$$ M_a = (9.821 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.821 |
| n | 6.000 |
| gf | 1.000 |
| gb | -1.000 |
| k | 0.980 |
| 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 | 2026-01-08 | +11.2322 | +0.117 |
| 2026-01-09 | 2026-03-07 | -1.9491 | -0.451 |
| 2026-03-07 | 2026-04-01 | +29.7409 | -5.237 |
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) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 15:23:46.34 | +04:52:06.2 | HIP 75231 | 23.33 |
| 2026-03-26 12:00 | 15:23:23.99 | +04:50:22.9 | HIP 75231 | 17.65 |
| 2026-03-27 00:00 | 15:23:00.92 | +04:48:38.3 | HIP 75231 | 11.95 |
| 2026-03-27 12:00 | 15:22:37.14 | +04:46:52.1 | HIP 75231 | 6.70 |
| 2026-03-28 00:00 | 15:22:12.67 | +04:45:04.5 | HIP 75231 | 4.91 |
| 2026-03-28 12:00 | 15:21:47.50 | +04:43:15.3 | HIP 75168 | 5.10 |
| 2026-03-29 00:00 | 15:21:21.67 | +04:41:24.5 | HIP 75168 | 7.78 |
| 2026-03-29 12:00 | 15:20:55.17 | +04:39:32.1 | HIP 75168 | 13.73 |
| 2026-03-30 00:00 | 15:20:28.03 | +04:37:38.0 | HIP 75168 | 20.43 |
| 2026-03-30 12:00 | 15:20:00.24 | +04:35:42.2 | HIP 74951 | 15.85 |
| 2026-03-31 00:00 | 15:19:31.84 | +04:33:44.7 | HIP 74951 | 8.58 |
| 2026-03-31 12:00 | 15:19:02.82 | +04:31:45.3 | HIP 74951 | 1.84 |
| 2026-04-01 00:00 | 15:18:33.20 | +04:29:44.2 | HIP 74951 | 6.91 |
| 2026-04-01 12:00 | 15:18:02.99 | +04:27:41.2 | HIP 74951 | 14.61 |
| 2026-04-02 00:00 | 15:17:32.22 | +04:25:36.3 | HIP 74951 | 22.53 |
| 2026-04-02 12:00 | 15:17:00.88 | +04:23:29.4 | HIP 74951 | 30.60 |
| 2026-04-03 00:00 | 15:16:29.00 | +04:21:20.6 | HIP 74951 | 38.83 |
| 2026-04-03 12:00 | 15:15:56.59 | +04:19:09.8 | HIP 74649 | 38.87 |
| 2026-04-04 00:00 | 15:15:23.66 | +04:16:57.0 | HIP 74649 | 39.53 |
| 2026-04-04 12:00 | 15:14:50.22 | +04:14:42.2 | HIP 74390 | 39.87 |
| 2026-04-05 00:00 | 15:14:16.30 | +04:12:25.2 | HIP 74390 | 31.90 |
| 2026-04-05 12:00 | 15:13:41.90 | +04:10:06.2 | HIP 74390 | 24.38 |
| 2026-04-06 00:00 | 15:13:07.05 | +04:07:45.0 | HIP 74390 | 18.08 |
| 2026-04-06 12:00 | 15:12:31.74 | +04:05:21.7 | HIP 74390 | 14.87 |
| 2026-04-07 00:00 | 15:11:56.01 | +04:02:56.1 | HIP 74314 | 8.91 |
| 2026-04-07 12:00 | 15:11:19.87 | +04:00:28.4 | HIP 74314 | 0.44 |
| 2026-04-08 00:00 | 15:10:43.33 | +03:57:58.4 | HIP 74314 | 9.89 |
| 2026-04-08 12:00 | 15:10:06.40 | +03:55:26.2 | HIP 74182 | 10.19 |
| 2026-04-09 00:00 | 15:09:29.11 | +03:52:51.7 | HIP 74182 | 0.95 |
| 2026-04-09 12:00 | 15:08:51.48 | +03:50:14.9 | HIP 74182 | 9.27 |
| 2026-04-10 00:00 | 15:08:13.50 | +03:47:35.8 | HIP 74079 | 8.32 |
| 2026-04-10 12:00 | 15:07:35.21 | +03:44:54.4 | HIP 74079 | 15.29 |
| 2026-04-11 00:00 | 15:06:56.62 | +03:42:10.6 | HIP 73874 | 23.04 |
| 2026-04-11 12:00 | 15:06:17.75 | +03:39:24.5 | HIP 73874 | 20.66 |
| 2026-04-12 00:00 | 15:05:38.61 | +03:36:36.0 | HIP 73874 | 23.00 |
| 2026-04-12 12:00 | 15:04:59.22 | +03:33:45.1 | HIP 73678 | 23.12 |
| 2026-04-13 00:00 | 15:04:19.59 | +03:30:51.8 | HIP 73678 | 17.45 |
| 2026-04-13 12:00 | 15:03:39.76 | +03:27:56.1 | HIP 73678 | 16.97 |
| 2026-04-14 00:00 | 15:02:59.72 | +03:24:57.9 | HIP 73544 | 17.14 |
| 2026-04-14 12:00 | 15:02:19.51 | +03:21:57.4 | HIP 73544 | 6.78 |
| 2026-04-15 00:00 | 15:01:39.13 | +03:18:54.4 | HIP 73544 | 4.28 |
| 2026-04-15 12:00 | 15:00:58.60 | +03:15:49.0 | HIP 73544 | 14.62 |
| 2026-04-16 00:00 | 15:00:17.95 | +03:12:41.1 | HIP 73480 | 21.73 |