C/2024 E1 (Wierzchos)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2024 E1 (Wierzchos) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2026-01-20T18:18:57.291840Z |
| Orbit solution date (soln_date, UTC) | 2026-05-06T05:40:29Z |
| Obs used | 2230 |
| NEO | - |
| M1 | 11.700 |
| K1 | 4.500 |
| 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) | 2025-05-23.0000000 |
| e | 1.00005834 |
| q (au) | 0.565948 |
| a (au) | -9700.054307 |
| i (deg) | 75.238589 |
| Ω (om, deg) | 108.082332 |
| ω (w, deg) | 243.634641 |
| M (ma, deg) | -0.000250 |
等級
散乱 + 全体線形
$$ M_a = (8.896 + 3.849\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 8.896 |
| n | 3.849 |
| gf | 1.000 |
| gb | -0.834 |
| k | 0.984 |
| 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 |
|---|---|---|---|
| 2024-02-15 | 2025-09-04 | -0.4921 | +0.203 |
| 2025-09-04 | 2025-11-10 | -3.3324 | +1.498 |
| 2025-11-10 | 2026-01-04 | +2.9225 | +0.438 |
| 2026-01-23 | 2026-03-01 | +1.7028 | -0.423 |
| 2026-03-01 | 2026-03-12 | +12.2602 | -0.898 |
| 2026-03-12 | 2026-04-11 | +1.5252 | +0.295 |
| 2026-04-11 | 2026-04-28 | +55.2991 | -11.955 |
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 | 06:03:05.59 | +24:28:18.3 | HIP 28684 | 21.43 |
| 2026-05-12 12:00 | 06:03:57.83 | +24:33:16.7 | HIP 28684 | 18.05 |
| 2026-05-13 00:00 | 06:04:49.93 | +24:38:11.6 | HIP 28684 | 22.88 |
| 2026-05-13 12:00 | 06:05:41.87 | +24:43:02.9 | HIP 28977 | 29.49 |
| 2026-05-14 00:00 | 06:06:33.67 | +24:47:50.6 | HIP 29091 | 24.26 |
| 2026-05-14 12:00 | 06:07:25.32 | +24:52:35.0 | HIP 29091 | 11.63 |
| 2026-05-15 00:00 | 06:08:16.82 | +24:57:15.9 | HIP 29091 | 1.12 |
| 2026-05-15 12:00 | 06:09:08.18 | +25:01:53.5 | HIP 29091 | 13.50 |
| 2026-05-16 00:00 | 06:09:59.40 | +25:06:27.9 | HIP 29334 | 20.08 |
| 2026-05-16 12:00 | 06:10:50.47 | +25:10:58.9 | HIP 29334 | 18.33 |
| 2026-05-17 00:00 | 06:11:41.41 | +25:15:26.8 | HIP 29454 | 18.42 |
| 2026-05-17 12:00 | 06:12:32.20 | +25:19:51.5 | HIP 29454 | 11.81 |
| 2026-05-18 00:00 | 06:13:22.86 | +25:24:13.0 | HIP 29454 | 15.54 |
| 2026-05-18 12:00 | 06:14:13.38 | +25:28:31.6 | HIP 29680 | 12.54 |
| 2026-05-19 00:00 | 06:15:03.77 | +25:32:47.1 | HIP 29680 | 5.02 |
| 2026-05-19 12:00 | 06:15:54.02 | +25:36:59.6 | HIP 29680 | 13.65 |
| 2026-05-20 00:00 | 06:16:44.14 | +25:41:09.1 | HIP 29833 | 11.69 |
| 2026-05-20 12:00 | 06:17:34.12 | +25:45:15.8 | HIP 29967 | 15.12 |
| 2026-05-21 00:00 | 06:18:23.98 | +25:49:19.6 | HIP 29967 | 4.58 |
| 2026-05-21 12:00 | 06:19:13.70 | +25:53:20.6 | HIP 30035 | 5.59 |
| 2026-05-22 00:00 | 06:20:03.29 | +25:57:18.9 | HIP 30035 | 11.31 |
| 2026-05-22 12:00 | 06:20:52.75 | +26:01:14.4 | HIP 30035 | 22.42 |
| 2026-05-23 00:00 | 06:21:42.09 | +26:05:07.2 | HIP 30346 | 18.14 |
| 2026-05-23 12:00 | 06:22:31.29 | +26:08:57.3 | HIP 30346 | 11.04 |
| 2026-05-24 00:00 | 06:23:20.37 | +26:12:44.8 | HIP 30346 | 13.67 |
| 2026-05-24 12:00 | 06:24:09.33 | +26:16:29.8 | HIP 30346 | 22.83 |
| 2026-05-25 00:00 | 06:24:58.15 | +26:20:12.2 | HIP 30644 | 22.49 |
| 2026-05-25 12:00 | 06:25:46.86 | +26:23:52.0 | HIP 30644 | 17.58 |
| 2026-05-26 00:00 | 06:26:35.44 | +26:27:29.4 | HIP 30724 | 15.87 |
| 2026-05-26 12:00 | 06:27:23.90 | +26:31:04.4 | HIP 30724 | 9.16 |
| 2026-05-27 00:00 | 06:28:12.24 | +26:34:36.9 | HIP 30724 | 13.27 |
| 2026-05-27 12:00 | 06:29:00.46 | +26:38:07.1 | HIP 30880 | 19.96 |
| 2026-05-28 00:00 | 06:29:48.57 | +26:41:34.9 | HIP 30984 | 16.09 |
| 2026-05-28 12:00 | 06:30:36.55 | +26:45:00.5 | HIP 30984 | 13.40 |
| 2026-05-29 00:00 | 06:31:24.41 | +26:48:23.7 | HIP 30984 | 18.77 |
| 2026-05-29 12:00 | 06:32:12.16 | +26:51:44.7 | HIP 31213 | 10.73 |
| 2026-05-30 00:00 | 06:32:59.80 | +26:55:03.5 | HIP 31213 | 9.92 |
| 2026-05-30 12:00 | 06:33:47.32 | +26:58:20.1 | HIP 31310 | 4.96 |
| 2026-05-31 00:00 | 06:34:34.72 | +27:01:34.5 | HIP 31310 | 8.26 |
| 2026-05-31 12:00 | 06:35:22.02 | +27:04:46.8 | HIP 31568 | 18.62 |
| 2026-06-01 00:00 | 06:36:09.20 | +27:07:57.0 | HIP 31568 | 9.55 |
| 2026-06-01 12:00 | 06:36:56.26 | +27:11:05.1 | HIP 31568 | 8.73 |
| 2026-06-02 00:00 | 06:37:43.22 | +27:14:11.2 | HIP 31568 | 17.29 |