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 · 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
$$
M_a = (7.388 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.388 |
| n |
6.000 |
| gf |
0.858 |
| gb |
-0.912 |
| k |
1.000 |
| δ90 |
4.584 |
| 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) |
| 2026-03-26 00:00 |
02:17:05.15 |
-25:44:43.5 |
HIP 10566 |
19.56 |
| 2026-03-26 12:00 |
02:17:15.86 |
-25:43:23.7 |
HIP 10566 |
20.60 |
| 2026-03-27 00:00 |
02:17:26.60 |
-25:42:04.4 |
HIP 10566 |
21.95 |
| 2026-03-27 12:00 |
02:17:37.36 |
-25:40:45.6 |
HIP 10566 |
23.56 |
| 2026-03-28 00:00 |
02:17:48.16 |
-25:39:27.3 |
HIP 10798 |
23.51 |
| 2026-03-28 12:00 |
02:17:58.98 |
-25:38:09.5 |
HIP 10798 |
22.98 |
| 2026-03-29 00:00 |
02:18:09.84 |
-25:36:52.3 |
HIP 10798 |
22.76 |
| 2026-03-29 12:00 |
02:18:20.72 |
-25:35:35.5 |
HIP 10798 |
22.87 |
| 2026-03-30 00:00 |
02:18:31.63 |
-25:34:19.3 |
HIP 10841 |
21.36 |
| 2026-03-30 12:00 |
02:18:42.57 |
-25:33:03.6 |
HIP 10841 |
18.82 |
| 2026-03-31 00:00 |
02:18:53.53 |
-25:31:48.5 |
HIP 10841 |
16.36 |
| 2026-03-31 12:00 |
02:19:04.52 |
-25:30:33.8 |
HIP 10841 |
14.02 |
| 2026-04-01 00:00 |
02:19:15.54 |
-25:29:19.7 |
HIP 10841 |
11.88 |
| 2026-04-01 12:00 |
02:19:26.58 |
-25:28:06.2 |
HIP 10841 |
10.07 |
| 2026-04-02 00:00 |
02:19:37.64 |
-25:26:53.2 |
HIP 10841 |
8.78 |
| 2026-04-02 12:00 |
02:19:48.73 |
-25:25:40.7 |
HIP 10841 |
8.28 |
| 2026-04-03 00:00 |
02:19:59.85 |
-25:24:28.8 |
HIP 10841 |
8.70 |
| 2026-04-03 12:00 |
02:20:10.99 |
-25:23:17.4 |
HIP 10841 |
9.92 |
| 2026-04-04 00:00 |
02:20:22.15 |
-25:22:06.6 |
HIP 10841 |
11.70 |
| 2026-04-04 12:00 |
02:20:33.33 |
-25:20:56.4 |
HIP 10841 |
13.82 |
| 2026-04-05 00:00 |
02:20:44.53 |
-25:19:46.6 |
HIP 10841 |
16.15 |
| 2026-04-05 12:00 |
02:20:55.76 |
-25:18:37.5 |
HIP 11041 |
18.37 |
| 2026-04-06 00:00 |
02:21:07.01 |
-25:17:28.9 |
HIP 11041 |
15.58 |
| 2026-04-06 12:00 |
02:21:18.28 |
-25:16:20.9 |
HIP 11041 |
12.80 |
| 2026-04-07 00:00 |
02:21:29.57 |
-25:15:13.5 |
HIP 11041 |
10.02 |
| 2026-04-07 12:00 |
02:21:40.87 |
-25:14:06.6 |
HIP 11041 |
7.24 |
| 2026-04-08 00:00 |
02:21:52.20 |
-25:13:00.3 |
HIP 11041 |
4.48 |
| 2026-04-08 12:00 |
02:22:03.55 |
-25:11:54.6 |
HIP 11041 |
1.79 |
| 2026-04-09 00:00 |
02:22:14.91 |
-25:10:49.4 |
HIP 11041 |
1.38 |
| 2026-04-09 12:00 |
02:22:26.29 |
-25:09:44.9 |
HIP 11041 |
4.02 |
| 2026-04-10 00:00 |
02:22:37.69 |
-25:08:40.9 |
HIP 11041 |
6.78 |
| 2026-04-10 12:00 |
02:22:49.11 |
-25:07:37.5 |
HIP 11041 |
9.56 |
| 2026-04-11 00:00 |
02:23:00.54 |
-25:06:34.8 |
HIP 11041 |
12.34 |
| 2026-04-11 12:00 |
02:23:11.99 |
-25:05:32.6 |
HIP 11204 |
14.41 |
| 2026-04-12 00:00 |
02:23:23.45 |
-25:04:31.0 |
HIP 11204 |
11.87 |
| 2026-04-12 12:00 |
02:23:34.93 |
-25:03:30.0 |
HIP 11204 |
9.47 |
| 2026-04-13 00:00 |
02:23:46.43 |
-25:02:29.6 |
HIP 11204 |
7.34 |
| 2026-04-13 12:00 |
02:23:57.93 |
-25:01:29.9 |
HIP 11204 |
5.79 |
| 2026-04-14 00:00 |
02:24:09.45 |
-25:00:30.7 |
HIP 11204 |
5.35 |
| 2026-04-14 12:00 |
02:24:20.99 |
-24:59:32.2 |
HIP 11204 |
6.26 |
| 2026-04-15 00:00 |
02:24:32.53 |
-24:58:34.2 |
HIP 11204 |
8.07 |
| 2026-04-15 12:00 |
02:24:44.09 |
-24:57:36.9 |
HIP 11204 |
10.32 |
| 2026-04-16 00:00 |
02:24:55.66 |
-24:56:40.2 |
HIP 11204 |
12.78 |