C/2022 K1 (Leonard)
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) |
| 2026-02-03 00:00 |
02:03:10.32 |
-28:31:36.5 |
HIP 9514 |
15.48 |
| 2026-02-03 12:00 |
02:03:15.19 |
-28:29:49.2 |
HIP 9514 |
15.04 |
| 2026-02-04 00:00 |
02:03:20.14 |
-28:28:01.8 |
HIP 9514 |
14.91 |
| 2026-02-04 12:00 |
02:03:25.17 |
-28:26:14.5 |
HIP 9514 |
15.08 |
| 2026-02-05 00:00 |
02:03:30.28 |
-28:24:27.2 |
HIP 9514 |
15.56 |
| 2026-02-05 12:00 |
02:03:35.47 |
-28:22:39.8 |
HIP 9514 |
16.32 |
| 2026-02-06 00:00 |
02:03:40.73 |
-28:20:52.5 |
HIP 9710 |
16.41 |
| 2026-02-06 12:00 |
02:03:46.08 |
-28:19:05.2 |
HIP 9710 |
15.41 |
| 2026-02-07 00:00 |
02:03:51.50 |
-28:17:17.9 |
HIP 9710 |
14.65 |
| 2026-02-07 12:00 |
02:03:57.01 |
-28:15:30.6 |
HIP 9710 |
14.16 |
| 2026-02-08 00:00 |
02:04:02.59 |
-28:13:43.4 |
HIP 9710 |
13.97 |
| 2026-02-08 12:00 |
02:04:08.24 |
-28:11:56.2 |
HIP 9710 |
14.10 |
| 2026-02-09 00:00 |
02:04:13.98 |
-28:10:09.0 |
HIP 9710 |
14.55 |
| 2026-02-09 12:00 |
02:04:19.79 |
-28:08:21.9 |
HIP 9749 |
14.63 |
| 2026-02-10 00:00 |
02:04:25.67 |
-28:06:34.9 |
HIP 9749 |
12.95 |
| 2026-02-10 12:00 |
02:04:31.63 |
-28:04:47.9 |
HIP 9749 |
11.44 |
| 2026-02-11 00:00 |
02:04:37.67 |
-28:03:01.0 |
HIP 9749 |
10.17 |
| 2026-02-11 12:00 |
02:04:43.78 |
-28:01:14.2 |
HIP 9749 |
9.25 |
| 2026-02-12 00:00 |
02:04:49.96 |
-27:59:27.4 |
HIP 9749 |
8.80 |
| 2026-02-12 12:00 |
02:04:56.22 |
-27:57:40.8 |
HIP 9749 |
8.90 |
| 2026-02-13 00:00 |
02:05:02.56 |
-27:55:54.2 |
HIP 9749 |
9.53 |
| 2026-02-13 12:00 |
02:05:08.96 |
-27:54:07.7 |
HIP 9749 |
10.61 |
| 2026-02-14 00:00 |
02:05:15.44 |
-27:52:21.4 |
HIP 9749 |
12.02 |
| 2026-02-14 12:00 |
02:05:21.99 |
-27:50:35.2 |
HIP 9749 |
13.66 |
| 2026-02-15 00:00 |
02:05:28.61 |
-27:48:49.1 |
HIP 9749 |
15.47 |
| 2026-02-15 12:00 |
02:05:35.31 |
-27:47:03.1 |
HIP 9749 |
17.39 |
| 2026-02-16 00:00 |
02:05:42.07 |
-27:45:17.2 |
HIP 9749 |
19.40 |
| 2026-02-16 12:00 |
02:05:48.91 |
-27:43:31.5 |
HIP 9888 |
19.34 |
| 2026-02-17 00:00 |
02:05:55.81 |
-27:41:46.0 |
HIP 9888 |
18.51 |
| 2026-02-17 12:00 |
02:06:02.79 |
-27:40:00.6 |
HIP 9888 |
17.93 |
| 2026-02-18 00:00 |
02:06:09.83 |
-27:38:15.4 |
HIP 9888 |
17.64 |
| 2026-02-18 12:00 |
02:06:16.94 |
-27:36:30.3 |
HIP 9888 |
17.63 |
| 2026-02-19 00:00 |
02:06:24.12 |
-27:34:45.4 |
HIP 9888 |
17.93 |
| 2026-02-19 12:00 |
02:06:31.37 |
-27:33:00.7 |
HIP 9888 |
18.52 |
| 2026-02-20 00:00 |
02:06:38.69 |
-27:31:16.1 |
HIP 9888 |
19.37 |
| 2026-02-20 12:00 |
02:06:46.07 |
-27:29:31.8 |
HIP 9955 |
18.91 |
| 2026-02-21 00:00 |
02:06:53.51 |
-27:27:47.7 |
HIP 9955 |
17.87 |
| 2026-02-21 12:00 |
02:07:01.03 |
-27:26:03.7 |
HIP 9955 |
17.09 |
| 2026-02-22 00:00 |
02:07:08.60 |
-27:24:20.0 |
HIP 9955 |
16.62 |
| 2026-02-22 12:00 |
02:07:16.24 |
-27:22:36.5 |
HIP 9955 |
16.47 |
| 2026-02-23 00:00 |
02:07:23.95 |
-27:20:53.2 |
HIP 9955 |
16.66 |
| 2026-02-23 12:00 |
02:07:31.72 |
-27:19:10.2 |
HIP 9955 |
17.19 |
| 2026-02-24 00:00 |
02:07:39.55 |
-27:17:27.4 |
HIP 9955 |
18.02 |