C/2024 E1 (Wierzchos)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2024 E1 (Wierzchos) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2026-01-20T18:17:29.474880Z |
| Orbit solution date (soln_date, UTC) | 2025-12-18T15:20:30Z |
| Obs used | 2060 |
| NEO | - |
| M1 | 11.400 |
| K1 | 5.000 |
| PC | - |
| Discovery observation (MPC, UTC) | 2024-03-03T10:42:00.662400Z |
| Discovery magnitude (MPC) | 20.48 G |
| Discovery observatory (MPC) | G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2025-04-18.0000000 |
| e | 1.00005342 |
| q (au) | 0.565905 |
| a (au) | -10594.433277 |
| i (deg) | 75.238464 |
| Ω (om, deg) | 108.082699 |
| ω (w, deg) | 243.636660 |
| M (ma, deg) | -0.000251 |
等級
散乱 + 全体線形
$$ M_a = (9.082 + 4.463\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.082 |
| n | 4.463 |
| gf | 1.000 |
| gb | -0.875 |
| k | 0.957 |
| δ90 | 9.977 |
| 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 |
|---|---|---|---|
| 2024-02-15 | 2025-07-31 | +0.7895 | -0.552 |
| 2025-07-31 | 2025-10-09 | -3.1816 | +1.454 |
| 2025-10-09 | 2025-12-10 | +0.9015 | +0.002 |
| 2026-01-23 | 2026-02-10 | +6.4103 | +0.769 |
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) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 22:52:26.27 | -42:45:16.0 | HIP 112874 | 22.53 |
| 2026-02-03 12:00 | 22:57:48.16 | -42:37:23.6 | HIP 113304 | 19.55 |
| 2026-02-04 00:00 | 23:03:11.17 | -42:28:15.0 | HIP 113681 | 18.78 |
| 2026-02-04 12:00 | 23:08:35.02 | -42:17:49.8 | HIP 114286 | 9.63 |
| 2026-02-05 00:00 | 23:13:59.40 | -42:06:07.4 | HIP 114721 | 6.05 |
| 2026-02-05 12:00 | 23:19:24.02 | -41:53:07.6 | HIP 115183 | 6.50 |
| 2026-02-06 00:00 | 23:24:48.59 | -41:38:50.3 | HIP 115459 | 17.06 |
| 2026-02-06 12:00 | 23:30:12.82 | -41:23:15.7 | HIP 115989 | 24.13 |
| 2026-02-07 00:00 | 23:35:36.41 | -41:06:23.9 | HIP 116480 | 12.88 |
| 2026-02-07 12:00 | 23:40:59.09 | -40:48:15.4 | HIP 116872 | 23.62 |
| 2026-02-08 00:00 | 23:46:20.55 | -40:28:50.9 | HIP 117289 | 15.49 |
| 2026-02-08 12:00 | 23:51:40.55 | -40:08:11.2 | HIP 117771 | 17.20 |
| 2026-02-09 00:00 | 23:56:58.80 | -39:46:17.3 | HIP 117943 | 18.11 |
| 2026-02-09 12:00 | 00:02:15.07 | -39:23:10.5 | HIP 125 | 7.91 |
| 2026-02-10 00:00 | 00:07:29.10 | -38:58:52.0 | HIP 567 | 9.33 |
| 2026-02-10 12:00 | 00:12:40.67 | -38:33:23.4 | HIP 875 | 25.79 |
| 2026-02-11 00:00 | 00:17:49.56 | -38:06:46.4 | HIP 1561 | 28.36 |
| 2026-02-11 12:00 | 00:22:55.57 | -37:39:02.9 | HIP 1804 | 14.86 |
| 2026-02-12 00:00 | 00:27:58.52 | -37:10:14.9 | HIP 2254 | 12.94 |
| 2026-02-12 12:00 | 00:32:58.23 | -36:40:24.5 | HIP 2638 | 9.10 |
| 2026-02-13 00:00 | 00:37:54.54 | -36:09:34.1 | HIP 3063 | 17.48 |
| 2026-02-13 12:00 | 00:42:47.31 | -35:37:46.0 | HIP 3344 | 23.65 |
| 2026-02-14 00:00 | 00:47:36.42 | -35:05:02.8 | HIP 3762 | 14.54 |
| 2026-02-14 12:00 | 00:52:21.75 | -34:31:27.1 | HIP 4098 | 16.75 |
| 2026-02-15 00:00 | 00:57:03.21 | -33:57:01.5 | HIP 4455 | 4.87 |
| 2026-02-15 12:00 | 01:01:40.71 | -33:21:48.9 | HIP 4776 | 3.89 |
| 2026-02-16 00:00 | 01:06:14.18 | -32:45:52.1 | HIP 5234 | 8.72 |
| 2026-02-16 12:00 | 01:10:43.56 | -32:09:13.9 | HIP 5547 | 7.85 |
| 2026-02-17 00:00 | 01:15:08.82 | -31:31:57.4 | HIP 5807 | 14.00 |
| 2026-02-17 12:00 | 01:19:29.92 | -30:54:05.4 | HIP 6233 | 29.65 |
| 2026-02-18 00:00 | 01:23:46.83 | -30:15:40.9 | HIP 6445 | 25.52 |
| 2026-02-18 12:00 | 01:27:59.55 | -29:36:46.9 | HIP 6744 | 17.41 |
| 2026-02-19 00:00 | 01:32:08.08 | -28:57:26.3 | HIP 7096 | 10.78 |
| 2026-02-19 12:00 | 01:36:12.43 | -28:17:42.1 | HIP 7330 | 24.26 |
| 2026-02-20 00:00 | 01:40:12.60 | -27:37:37.1 | HIP 7947 | 25.39 |
| 2026-02-20 12:00 | 01:44:08.63 | -26:57:14.2 | HIP 8076 | 6.35 |
| 2026-02-21 00:00 | 01:48:00.55 | -26:16:36.3 | HIP 8417 | 8.05 |
| 2026-02-21 12:00 | 01:51:48.40 | -25:35:45.9 | HIP 8736 | 10.91 |
| 2026-02-22 00:00 | 01:55:32.21 | -24:54:45.9 | HIP 8936 | 6.47 |
| 2026-02-22 12:00 | 01:59:12.04 | -24:13:38.7 | HIP 9281 | 14.92 |
| 2026-02-23 00:00 | 02:02:47.93 | -23:32:27.0 | HIP 9562 | 20.76 |
| 2026-02-23 12:00 | 02:06:19.95 | -22:51:13.2 | HIP 9712 | 24.81 |
| 2026-02-24 00:00 | 02:09:48.15 | -22:09:59.5 | HIP 10059 | 7.53 |