24P/Schaumasse
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 24P/Schaumasse |
| Type | P |
| Perihelion (tp_cal, UTC) | 2026-01-08T16:42:44.104320Z |
| Orbit solution date (soln_date, UTC) | 2026-05-11T09:34:48Z |
| Obs used | 3075 |
| NEO | Yes |
| M1 | 14.500 |
| K1 | 9.000 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2023-09-03.0000000 |
| e | 0.70779733 |
| q (au) | 1.185074 |
| a (au) | 4.055657 |
| i (deg) | 11.502699 |
| Ω (om, deg) | 78.300197 |
| ω (w, deg) | 58.466740 |
| M (ma, deg) | 256.378022 |
等級
散乱 + 全体線形
$$ M_a = (9.858 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.858 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.611 |
| k | 0.960 |
| 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 | +10.4213 | +0.227 |
| 2026-01-09 | 2026-03-23 | +4.1236 | -1.034 |
| 2026-03-23 | 2026-05-18 | -0.6088 | +0.296 |
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) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 14:28:28.57 | -00:17:47.6 | HIP 70717 | 26.56 |
| 2026-05-12 12:00 | 14:28:01.14 | -00:22:29.7 | HIP 70717 | 29.30 |
| 2026-05-13 00:00 | 14:27:34.19 | -00:27:12.8 | HIP 70566 | 26.88 |
| 2026-05-13 12:00 | 14:27:07.72 | -00:31:56.6 | HIP 70566 | 18.77 |
| 2026-05-14 00:00 | 14:26:41.74 | -00:36:41.3 | HIP 70566 | 10.79 |
| 2026-05-14 12:00 | 14:26:16.25 | -00:41:26.8 | HIP 70566 | 3.29 |
| 2026-05-15 00:00 | 14:25:51.26 | -00:46:13.1 | HIP 70566 | 5.57 |
| 2026-05-15 12:00 | 14:25:26.76 | -00:51:00.1 | HIP 70566 | 13.15 |
| 2026-05-16 00:00 | 14:25:02.76 | -00:55:47.8 | HIP 70397 | 13.97 |
| 2026-05-16 12:00 | 14:24:39.27 | -01:00:36.2 | HIP 70397 | 7.14 |
| 2026-05-17 00:00 | 14:24:16.29 | -01:05:25.2 | HIP 70397 | 4.73 |
| 2026-05-17 12:00 | 14:23:53.81 | -01:10:14.9 | HIP 70397 | 10.26 |
| 2026-05-18 00:00 | 14:23:31.84 | -01:15:05.2 | HIP 70397 | 17.20 |
| 2026-05-18 12:00 | 14:23:10.39 | -01:19:56.1 | HIP 70285 | 15.31 |
| 2026-05-19 00:00 | 14:22:49.45 | -01:24:47.5 | HIP 70285 | 9.50 |
| 2026-05-19 12:00 | 14:22:29.02 | -01:29:39.5 | HIP 70285 | 6.82 |
| 2026-05-20 00:00 | 14:22:09.11 | -01:34:31.9 | HIP 70285 | 9.99 |
| 2026-05-20 12:00 | 14:21:49.71 | -01:39:24.8 | HIP 70285 | 15.69 |
| 2026-05-21 00:00 | 14:21:30.83 | -01:44:18.2 | HIP 70106 | 13.33 |
| 2026-05-21 12:00 | 14:21:12.47 | -01:49:11.9 | HIP 70106 | 13.31 |
| 2026-05-22 00:00 | 14:20:54.62 | -01:54:06.1 | HIP 70106 | 16.35 |
| 2026-05-22 12:00 | 14:20:37.29 | -01:59:00.6 | HIP 69997 | 19.46 |
| 2026-05-23 00:00 | 14:20:20.47 | -02:03:55.4 | HIP 69997 | 14.13 |
| 2026-05-23 12:00 | 14:20:04.16 | -02:08:50.5 | HIP 69997 | 10.35 |
| 2026-05-24 00:00 | 14:19:48.36 | -02:13:45.9 | HIP 70012 | 4.50 |
| 2026-05-24 12:00 | 14:19:33.08 | -02:18:41.6 | HIP 70012 | 2.78 |
| 2026-05-25 00:00 | 14:19:18.30 | -02:23:37.4 | HIP 70012 | 8.49 |
| 2026-05-25 12:00 | 14:19:04.03 | -02:28:33.5 | HIP 70012 | 14.51 |
| 2026-05-26 00:00 | 14:18:50.27 | -02:33:29.7 | HIP 70012 | 20.50 |
| 2026-05-26 12:00 | 14:18:37.01 | -02:38:26.1 | HIP 70012 | 26.45 |
| 2026-05-27 00:00 | 14:18:24.25 | -02:43:22.6 | HIP 70012 | 32.32 |
| 2026-05-27 12:00 | 14:18:11.99 | -02:48:19.2 | HIP 69747 | 34.58 |
| 2026-05-28 00:00 | 14:18:00.22 | -02:53:15.9 | HIP 69747 | 29.12 |
| 2026-05-28 12:00 | 14:17:48.95 | -02:58:12.7 | HIP 69747 | 23.89 |
| 2026-05-29 00:00 | 14:17:38.17 | -03:03:09.5 | HIP 69747 | 19.03 |
| 2026-05-29 12:00 | 14:17:27.88 | -03:08:06.4 | HIP 69747 | 14.86 |
| 2026-05-30 00:00 | 14:17:18.07 | -03:13:03.2 | HIP 69747 | 12.02 |
| 2026-05-30 12:00 | 14:17:08.75 | -03:18:00.0 | HIP 69747 | 11.46 |
| 2026-05-31 00:00 | 14:16:59.90 | -03:22:56.8 | HIP 69747 | 13.41 |
| 2026-05-31 12:00 | 14:16:51.54 | -03:27:53.6 | HIP 69747 | 16.98 |
| 2026-06-01 00:00 | 14:16:43.65 | -03:32:50.3 | HIP 69747 | 21.33 |
| 2026-06-01 12:00 | 14:16:36.23 | -03:37:46.9 | HIP 69651 | 22.41 |
| 2026-06-02 00:00 | 14:16:29.28 | -03:42:43.5 | HIP 69651 | 23.83 |