C/2022 R3 (Leonard)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2022 R3 (Leonard) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2023-03-05T07:22:22.114560Z |
| Orbit solution date (soln_date, UTC) | 2025-04-11T14:44:29Z |
| Obs used | 355 |
| NEO | - |
| M1 | 12.300 |
| K1 | 4.500 |
| PC | - |
| Discovery observation (MPC, UTC) | 2022-09-15T08:35:14.697600Z |
| Discovery magnitude (MPC) | 18.96 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) | 2023-08-01.0000000 |
| e | 1.00075876 |
| q (au) | 5.128952 |
| a (au) | -6759.666695 |
| i (deg) | 43.082904 |
| Ω (om, deg) | 8.238598 |
| ω (w, deg) | 72.866685 |
| M (ma, deg) | 0.000264 |
等級
散乱 + 全体線形
$$ M_a = (16.040 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 16.040 |
| n | 2.000 |
| gf | 1.000 |
| gb | -0.844 |
| k | 0.800 |
| 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 |
|---|---|---|---|
| 2023-08-17 | 2024-05-13 | -12.5844 | +9.340 |
| 2024-05-13 | 2026-02-25 | -19.7422 | +16.108 |
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 | 11:37:22.20 | +18:26:14.9 | HIP 56637 | 9.33 |
| 2026-05-12 12:00 | 11:37:17.71 | +18:25:10.8 | HIP 56637 | 8.41 |
| 2026-05-13 00:00 | 11:37:13.31 | +18:24:06.1 | HIP 56637 | 7.69 |
| 2026-05-13 12:00 | 11:37:09.02 | +18:23:00.8 | HIP 56637 | 7.25 |
| 2026-05-14 00:00 | 11:37:04.83 | +18:21:54.8 | HIP 56637 | 7.12 |
| 2026-05-14 12:00 | 11:37:00.73 | +18:20:48.2 | HIP 56637 | 7.32 |
| 2026-05-15 00:00 | 11:36:56.74 | +18:19:41.0 | HIP 56637 | 7.82 |
| 2026-05-15 12:00 | 11:36:52.84 | +18:18:33.2 | HIP 56637 | 8.56 |
| 2026-05-16 00:00 | 11:36:49.05 | +18:17:24.8 | HIP 56637 | 9.48 |
| 2026-05-16 12:00 | 11:36:45.36 | +18:16:15.7 | HIP 56637 | 10.53 |
| 2026-05-17 00:00 | 11:36:41.76 | +18:15:06.1 | HIP 56637 | 11.68 |
| 2026-05-17 12:00 | 11:36:38.27 | +18:13:55.8 | HIP 56637 | 12.89 |
| 2026-05-18 00:00 | 11:36:34.87 | +18:12:45.0 | HIP 56637 | 14.16 |
| 2026-05-18 12:00 | 11:36:31.58 | +18:11:33.5 | HIP 56637 | 15.45 |
| 2026-05-19 00:00 | 11:36:28.39 | +18:10:21.5 | HIP 56637 | 16.78 |
| 2026-05-19 12:00 | 11:36:25.30 | +18:09:08.9 | HIP 56637 | 18.12 |
| 2026-05-20 00:00 | 11:36:22.31 | +18:07:55.7 | HIP 56548 | 18.32 |
| 2026-05-20 12:00 | 11:36:19.42 | +18:06:41.9 | HIP 56548 | 16.91 |
| 2026-05-21 00:00 | 11:36:16.63 | +18:05:27.6 | HIP 56548 | 15.51 |
| 2026-05-21 12:00 | 11:36:13.94 | +18:04:12.7 | HIP 56548 | 14.12 |
| 2026-05-22 00:00 | 11:36:11.35 | +18:02:57.2 | HIP 56548 | 12.74 |
| 2026-05-22 12:00 | 11:36:08.87 | +18:01:41.2 | HIP 56548 | 11.36 |
| 2026-05-23 00:00 | 11:36:06.48 | +18:00:24.6 | HIP 56548 | 10.00 |
| 2026-05-23 12:00 | 11:36:04.19 | +17:59:07.5 | HIP 56548 | 8.66 |
| 2026-05-24 00:00 | 11:36:02.01 | +17:57:49.8 | HIP 56548 | 7.34 |
| 2026-05-24 12:00 | 11:35:59.92 | +17:56:31.6 | HIP 56548 | 6.08 |
| 2026-05-25 00:00 | 11:35:57.93 | +17:55:12.9 | HIP 56548 | 4.90 |
| 2026-05-25 12:00 | 11:35:56.05 | +17:53:53.6 | HIP 56548 | 3.88 |
| 2026-05-26 00:00 | 11:35:54.26 | +17:52:33.8 | HIP 56548 | 3.20 |
| 2026-05-26 12:00 | 11:35:52.57 | +17:51:13.5 | HIP 56548 | 3.07 |
| 2026-05-27 00:00 | 11:35:50.99 | +17:49:52.6 | HIP 56548 | 3.56 |
| 2026-05-27 12:00 | 11:35:49.50 | +17:48:31.3 | HIP 56548 | 4.47 |
| 2026-05-28 00:00 | 11:35:48.11 | +17:47:09.4 | HIP 56548 | 5.61 |
| 2026-05-28 12:00 | 11:35:46.82 | +17:45:47.1 | HIP 56548 | 6.85 |
| 2026-05-29 00:00 | 11:35:45.62 | +17:44:24.2 | HIP 56548 | 8.17 |
| 2026-05-29 12:00 | 11:35:44.53 | +17:43:00.8 | HIP 56548 | 9.52 |
| 2026-05-30 00:00 | 11:35:43.54 | +17:41:37.0 | HIP 56548 | 10.89 |
| 2026-05-30 12:00 | 11:35:42.64 | +17:40:12.6 | HIP 56548 | 12.29 |
| 2026-05-31 00:00 | 11:35:41.84 | +17:38:47.8 | HIP 56548 | 13.69 |
| 2026-05-31 12:00 | 11:35:41.14 | +17:37:22.5 | HIP 56548 | 15.11 |
| 2026-06-01 00:00 | 11:35:40.53 | +17:35:56.7 | HIP 56548 | 16.54 |
| 2026-06-01 12:00 | 11:35:40.03 | +17:34:30.5 | HIP 56548 | 17.98 |
| 2026-06-02 00:00 | 11:35:39.62 | +17:33:03.8 | HIP 56548 | 19.43 |