メタデータ
| 項目 |
値 |
| Designation |
C/2022 K1 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-12-17T08:14:51.092160Z |
| Orbit solution date (soln_date, UTC) |
2022-09-27T15:43:04Z |
| Obs used |
87 |
| NEO |
- |
| M1 |
8.500 |
| K1 |
14.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-05-30T09:54:41.385600Z |
| Discovery magnitude (MPC) |
19.70 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) |
2022-07-11.0000000 |
| e |
1.00269066 |
| q (au) |
3.986818 |
| a (au) |
-1481.722941 |
| i (deg) |
41.979828 |
| Ω (om, deg) |
136.294011 |
| ω (w, deg) |
142.639740 |
| M (ma, deg) |
0.003554 |
等級
散乱 + 全体線形
$$
M_a = (7.351 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.351 |
| n |
6.000 |
| gf |
0.871 |
| gb |
-0.912 |
| k |
1.000 |
| δ90 |
5.456 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
02:56:59.02 |
-25:49:12.5 |
HIP 13695 |
18.23 |
| 2026-07-29 12:00 |
02:57:02.78 |
-25:50:33.5 |
HIP 13695 |
17.45 |
| 2026-07-30 00:00 |
02:57:06.46 |
-25:51:54.9 |
HIP 13695 |
16.77 |
| 2026-07-30 12:00 |
02:57:10.06 |
-25:53:16.8 |
HIP 13695 |
16.21 |
| 2026-07-31 00:00 |
02:57:13.59 |
-25:54:39.0 |
HIP 13695 |
15.76 |
| 2026-07-31 12:00 |
02:57:17.04 |
-25:56:01.7 |
HIP 13695 |
15.45 |
| 2026-08-01 00:00 |
02:57:20.41 |
-25:57:24.7 |
HIP 13695 |
15.28 |
| 2026-08-01 12:00 |
02:57:23.70 |
-25:58:48.2 |
HIP 13695 |
15.25 |
| 2026-08-02 00:00 |
02:57:26.92 |
-26:00:12.1 |
HIP 13695 |
15.36 |
| 2026-08-02 12:00 |
02:57:30.05 |
-26:01:36.3 |
HIP 13790 |
14.51 |
| 2026-08-03 00:00 |
02:57:33.11 |
-26:03:00.9 |
HIP 13790 |
13.08 |
| 2026-08-03 12:00 |
02:57:36.08 |
-26:04:25.9 |
HIP 13790 |
11.68 |
| 2026-08-04 00:00 |
02:57:38.98 |
-26:05:51.3 |
HIP 13790 |
10.33 |
| 2026-08-04 12:00 |
02:57:41.79 |
-26:07:17.0 |
HIP 13790 |
9.03 |
| 2026-08-05 00:00 |
02:57:44.53 |
-26:08:43.1 |
HIP 13790 |
7.81 |
| 2026-08-05 12:00 |
02:57:47.18 |
-26:10:09.6 |
HIP 13790 |
6.72 |
| 2026-08-06 00:00 |
02:57:49.76 |
-26:11:36.4 |
HIP 13790 |
5.84 |
| 2026-08-06 12:00 |
02:57:52.25 |
-26:13:03.5 |
HIP 13790 |
5.26 |
| 2026-08-07 00:00 |
02:57:54.66 |
-26:14:31.0 |
HIP 13790 |
5.08 |
| 2026-08-07 12:00 |
02:57:56.99 |
-26:15:58.8 |
HIP 13790 |
5.35 |
| 2026-08-08 00:00 |
02:57:59.24 |
-26:17:26.9 |
HIP 13790 |
6.01 |
| 2026-08-08 12:00 |
02:58:01.41 |
-26:18:55.4 |
HIP 13790 |
6.94 |
| 2026-08-09 00:00 |
02:58:03.49 |
-26:20:24.1 |
HIP 13790 |
8.05 |
| 2026-08-09 12:00 |
02:58:05.50 |
-26:21:53.2 |
HIP 13790 |
9.28 |
| 2026-08-10 00:00 |
02:58:07.42 |
-26:23:22.6 |
HIP 13790 |
10.58 |
| 2026-08-10 12:00 |
02:58:09.25 |
-26:24:52.2 |
HIP 13790 |
11.94 |
| 2026-08-11 00:00 |
02:58:11.01 |
-26:26:22.2 |
HIP 13790 |
13.32 |
| 2026-08-11 12:00 |
02:58:12.68 |
-26:27:52.4 |
HIP 13790 |
14.74 |
| 2026-08-12 00:00 |
02:58:14.27 |
-26:29:22.9 |
HIP 13790 |
16.17 |
| 2026-08-12 12:00 |
02:58:15.77 |
-26:30:53.6 |
HIP 13790 |
17.61 |
| 2026-08-13 00:00 |
02:58:17.20 |
-26:32:24.6 |
HIP 13790 |
19.06 |
| 2026-08-13 12:00 |
02:58:18.53 |
-26:33:55.8 |
HIP 13790 |
20.53 |
| 2026-08-14 00:00 |
02:58:19.79 |
-26:35:27.3 |
HIP 13873 |
20.79 |
| 2026-08-14 12:00 |
02:58:20.96 |
-26:36:59.0 |
HIP 13873 |
19.24 |
| 2026-08-15 00:00 |
02:58:22.05 |
-26:38:31.0 |
HIP 13873 |
17.69 |
| 2026-08-15 12:00 |
02:58:23.05 |
-26:40:03.1 |
HIP 13873 |
16.15 |
| 2026-08-16 00:00 |
02:58:23.97 |
-26:41:35.5 |
HIP 13873 |
14.61 |
| 2026-08-16 12:00 |
02:58:24.81 |
-26:43:08.1 |
HIP 13873 |
13.08 |
| 2026-08-17 00:00 |
02:58:25.56 |
-26:44:40.8 |
HIP 13873 |
11.55 |
| 2026-08-17 12:00 |
02:58:26.23 |
-26:46:13.8 |
HIP 13873 |
10.04 |
| 2026-08-18 00:00 |
02:58:26.82 |
-26:47:46.9 |
HIP 13873 |
8.55 |
| 2026-08-18 12:00 |
02:58:27.32 |
-26:49:20.2 |
HIP 13873 |
7.09 |
| 2026-08-19 00:00 |
02:58:27.74 |
-26:50:53.6 |
HIP 13873 |
5.70 |