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 · University of Arizona 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) |
|---|---|---|---|---|
| 2026-06-01 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 |
| 2026-06-02 12:00 | 11:35:39.31 | +17:31:36.6 | HIP 56548 | 20.88 |
| 2026-06-03 00:00 | 11:35:39.09 | +17:30:09.0 | HIP 56548 | 22.34 |
| 2026-06-03 12:00 | 11:35:38.97 | +17:28:40.9 | HIP 56548 | 23.81 |
| 2026-06-04 00:00 | 11:35:38.95 | +17:27:12.3 | HIP 56548 | 25.29 |
| 2026-06-04 12:00 | 11:35:39.02 | +17:25:43.3 | HIP 56548 | 26.77 |
| 2026-06-05 00:00 | 11:35:39.20 | +17:24:13.9 | HIP 56476 | 26.27 |
| 2026-06-05 12:00 | 11:35:39.46 | +17:22:44.0 | HIP 56476 | 25.01 |
| 2026-06-06 00:00 | 11:35:39.82 | +17:21:13.7 | HIP 56578 | 23.58 |
| 2026-06-06 12:00 | 11:35:40.28 | +17:19:42.9 | HIP 56578 | 22.08 |
| 2026-06-07 00:00 | 11:35:40.83 | +17:18:11.7 | HIP 56578 | 20.57 |
| 2026-06-07 12:00 | 11:35:41.48 | +17:16:40.1 | HIP 56578 | 19.04 |
| 2026-06-08 00:00 | 11:35:42.22 | +17:15:08.1 | HIP 56578 | 17.51 |
| 2026-06-08 12:00 | 11:35:43.06 | +17:13:35.6 | HIP 56578 | 15.96 |
| 2026-06-09 00:00 | 11:35:43.99 | +17:12:02.7 | HIP 56578 | 14.41 |
| 2026-06-09 12:00 | 11:35:45.02 | +17:10:29.4 | HIP 56578 | 12.84 |
| 2026-06-10 00:00 | 11:35:46.14 | +17:08:55.7 | HIP 56578 | 11.27 |
| 2026-06-10 12:00 | 11:35:47.35 | +17:07:21.6 | HIP 56578 | 9.68 |
| 2026-06-11 00:00 | 11:35:48.66 | +17:05:47.1 | HIP 56578 | 8.08 |
| 2026-06-11 12:00 | 11:35:50.06 | +17:04:12.2 | HIP 56578 | 6.48 |
| 2026-06-12 00:00 | 11:35:51.55 | +17:02:36.9 | HIP 56578 | 4.87 |
| 2026-06-12 12:00 | 11:35:53.13 | +17:01:01.3 | HIP 56578 | 3.26 |
| 2026-06-13 00:00 | 11:35:54.81 | +16:59:25.2 | HIP 56578 | 1.68 |
| 2026-06-13 12:00 | 11:35:56.58 | +16:57:48.7 | HIP 56578 | 0.68 |
| 2026-06-14 00:00 | 11:35:58.44 | +16:56:11.9 | HIP 56578 | 1.91 |
| 2026-06-14 12:00 | 11:36:00.40 | +16:54:34.7 | HIP 56578 | 3.54 |
| 2026-06-15 00:00 | 11:36:02.44 | +16:52:57.1 | HIP 56578 | 5.21 |
| 2026-06-15 12:00 | 11:36:04.58 | +16:51:19.1 | HIP 56578 | 6.90 |
| 2026-06-16 00:00 | 11:36:06.81 | +16:49:40.8 | HIP 56578 | 8.62 |
| 2026-06-16 12:00 | 11:36:09.12 | +16:48:02.2 | HIP 56578 | 10.34 |
| 2026-06-17 00:00 | 11:36:11.53 | +16:46:23.1 | HIP 56578 | 12.08 |
| 2026-06-17 12:00 | 11:36:14.03 | +16:44:43.8 | HIP 56578 | 13.84 |
| 2026-06-18 00:00 | 11:36:16.61 | +16:43:04.0 | HIP 56578 | 15.60 |
| 2026-06-18 12:00 | 11:36:19.28 | +16:41:24.0 | HIP 56578 | 17.38 |
| 2026-06-19 00:00 | 11:36:22.05 | +16:39:43.6 | HIP 56578 | 19.17 |
| 2026-06-19 12:00 | 11:36:24.90 | +16:38:02.9 | HIP 56578 | 20.98 |
| 2026-06-20 00:00 | 11:36:27.83 | +16:36:21.8 | HIP 56578 | 22.80 |
| 2026-06-20 12:00 | 11:36:30.86 | +16:34:40.5 | HIP 56742 | 21.96 |
| 2026-06-21 00:00 | 11:36:33.97 | +16:32:58.8 | HIP 56742 | 21.12 |
| 2026-06-21 12:00 | 11:36:37.17 | +16:31:16.8 | HIP 56742 | 20.39 |
| 2026-06-22 00:00 | 11:36:40.45 | +16:29:34.4 | HIP 56742 | 19.80 |