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
$$ M_a = (15.502 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 15.502 |
| n | 2.000 |
| gf | 1.000 |
| gb | -0.800 |
| 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 | -22.7307 | +16.947 |
| 2024-05-13 | 2025-03-20 | +18.0995 | -14.756 |
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 | 12:08:19.30 | +18:25:00.3 | HIP 59234 | 10.95 |
| 2026-02-03 12:00 | 12:08:11.93 | +18:25:39.2 | HIP 59234 | 12.73 |
| 2026-02-04 00:00 | 12:08:04.47 | +18:26:18.1 | HIP 59234 | 14.56 |
| 2026-02-04 12:00 | 12:07:56.91 | +18:26:57.2 | HIP 59234 | 16.42 |
| 2026-02-05 00:00 | 12:07:49.27 | +18:27:36.4 | HIP 59234 | 18.31 |
| 2026-02-05 12:00 | 12:07:41.52 | +18:28:15.6 | HIP 59234 | 20.22 |
| 2026-02-06 00:00 | 12:07:33.69 | +18:28:54.9 | HIP 59234 | 22.16 |
| 2026-02-06 12:00 | 12:07:25.77 | +18:29:34.3 | HIP 59049 | 23.09 |
| 2026-02-07 00:00 | 12:07:17.75 | +18:30:13.8 | HIP 59049 | 22.43 |
| 2026-02-07 12:00 | 12:07:09.65 | +18:30:53.3 | HIP 59049 | 21.92 |
| 2026-02-08 00:00 | 12:07:01.46 | +18:31:32.8 | HIP 59049 | 21.59 |
| 2026-02-08 12:00 | 12:06:53.18 | +18:32:12.4 | HIP 59049 | 21.44 |
| 2026-02-09 00:00 | 12:06:44.81 | +18:32:52.0 | HIP 59049 | 21.49 |
| 2026-02-09 12:00 | 12:06:36.35 | +18:33:31.6 | HIP 59049 | 21.73 |
| 2026-02-10 00:00 | 12:06:27.82 | +18:34:11.2 | HIP 59049 | 22.18 |
| 2026-02-10 12:00 | 12:06:19.19 | +18:34:50.8 | HIP 59049 | 22.81 |
| 2026-02-11 00:00 | 12:06:10.49 | +18:35:30.4 | HIP 59049 | 23.63 |
| 2026-02-11 12:00 | 12:06:01.70 | +18:36:09.9 | HIP 59049 | 24.61 |
| 2026-02-12 00:00 | 12:05:52.83 | +18:36:49.4 | HIP 58854 | 25.24 |
| 2026-02-12 12:00 | 12:05:43.88 | +18:37:28.9 | HIP 58854 | 23.03 |
| 2026-02-13 00:00 | 12:05:34.85 | +18:38:08.3 | HIP 58854 | 20.81 |
| 2026-02-13 12:00 | 12:05:25.74 | +18:38:47.6 | HIP 58854 | 18.59 |
| 2026-02-14 00:00 | 12:05:16.56 | +18:39:26.9 | HIP 58854 | 16.35 |
| 2026-02-14 12:00 | 12:05:07.29 | +18:40:06.1 | HIP 58854 | 14.11 |
| 2026-02-15 00:00 | 12:04:57.95 | +18:40:45.1 | HIP 58854 | 11.87 |
| 2026-02-15 12:00 | 12:04:48.54 | +18:41:24.1 | HIP 58854 | 9.65 |
| 2026-02-16 00:00 | 12:04:39.06 | +18:42:02.9 | HIP 58854 | 7.48 |
| 2026-02-16 12:00 | 12:04:29.50 | +18:42:41.6 | HIP 58854 | 5.43 |
| 2026-02-17 00:00 | 12:04:19.87 | +18:43:20.2 | HIP 58854 | 3.77 |
| 2026-02-17 12:00 | 12:04:10.17 | +18:43:58.6 | HIP 58854 | 3.20 |
| 2026-02-18 00:00 | 12:04:00.41 | +18:44:36.8 | HIP 58854 | 4.21 |
| 2026-02-18 12:00 | 12:03:50.57 | +18:45:14.9 | HIP 58831 | 4.41 |
| 2026-02-19 00:00 | 12:03:40.67 | +18:45:52.8 | HIP 58831 | 5.69 |
| 2026-02-19 12:00 | 12:03:30.70 | +18:46:30.5 | HIP 58831 | 7.57 |
| 2026-02-20 00:00 | 12:03:20.67 | +18:47:08.0 | HIP 58831 | 9.72 |
| 2026-02-20 12:00 | 12:03:10.58 | +18:47:45.3 | HIP 58831 | 12.00 |
| 2026-02-21 00:00 | 12:03:00.43 | +18:48:22.4 | HIP 58831 | 14.36 |
| 2026-02-21 12:00 | 12:02:50.21 | +18:48:59.2 | HIP 58831 | 16.77 |
| 2026-02-22 00:00 | 12:02:39.94 | +18:49:35.8 | HIP 58831 | 19.21 |
| 2026-02-22 12:00 | 12:02:29.61 | +18:50:12.1 | HIP 58831 | 21.68 |
| 2026-02-23 00:00 | 12:02:19.22 | +18:50:48.2 | HIP 58635 | 23.62 |
| 2026-02-23 12:00 | 12:02:08.78 | +18:51:23.9 | HIP 58635 | 21.90 |
| 2026-02-24 00:00 | 12:01:58.29 | +18:51:59.5 | HIP 58635 | 20.34 |