メタデータ
| 項目 |
値 |
| Designation |
C/2022 L1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-09-28T05:52:28.940160Z |
| Orbit solution date (soln_date, UTC) |
2023-02-13T23:13:35Z |
| Obs used |
415 |
| NEO |
- |
| M1 |
13.100 |
| K1 |
16.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2022-06-04T10:13:35.904000Z |
| Discovery magnitude (MPC) |
19.30 G |
| Discovery observatory (MPC) |
703 · University of Arizona Catalina Sky Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-08-30.0000000 |
| e |
0.99710505 |
| q (au) |
1.591537 |
| a (au) |
549.763100 |
| i (deg) |
123.469284 |
| Ω (om, deg) |
300.024952 |
| ω (w, deg) |
59.851285 |
| M (ma, deg) |
359.997764 |
等級
散乱 + 全体線形
$$
M_a = (13.376 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.376 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.588 |
| k |
0.955 |
| δ90 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
07:22:46.29 |
+08:06:21.4 |
HIP 35808 |
35.11 |
| 2026-07-29 12:00 |
07:22:53.71 |
+08:05:39.9 |
HIP 35808 |
34.20 |
| 2026-07-30 00:00 |
07:23:01.11 |
+08:04:58.3 |
HIP 35808 |
33.38 |
| 2026-07-30 12:00 |
07:23:08.49 |
+08:04:16.5 |
HIP 35808 |
32.66 |
| 2026-07-31 00:00 |
07:23:15.84 |
+08:03:34.4 |
HIP 35808 |
32.04 |
| 2026-07-31 12:00 |
07:23:23.17 |
+08:02:52.2 |
HIP 35808 |
31.52 |
| 2026-08-01 00:00 |
07:23:30.47 |
+08:02:09.7 |
HIP 35808 |
31.10 |
| 2026-08-01 12:00 |
07:23:37.75 |
+08:01:27.0 |
HIP 35808 |
30.81 |
| 2026-08-02 00:00 |
07:23:45.00 |
+08:00:44.1 |
HIP 35808 |
30.62 |
| 2026-08-02 12:00 |
07:23:52.22 |
+08:00:01.0 |
HIP 35808 |
30.55 |
| 2026-08-03 00:00 |
07:23:59.42 |
+07:59:17.7 |
HIP 35808 |
30.60 |
| 2026-08-03 12:00 |
07:24:06.59 |
+07:58:34.2 |
HIP 35808 |
30.76 |
| 2026-08-04 00:00 |
07:24:13.74 |
+07:57:50.5 |
HIP 35808 |
31.03 |
| 2026-08-04 12:00 |
07:24:20.85 |
+07:57:06.6 |
HIP 36042 |
30.41 |
| 2026-08-05 00:00 |
07:24:27.94 |
+07:56:22.5 |
HIP 36042 |
28.74 |
| 2026-08-05 12:00 |
07:24:35.00 |
+07:55:38.2 |
HIP 36042 |
27.10 |
| 2026-08-06 00:00 |
07:24:42.03 |
+07:54:53.7 |
HIP 36042 |
25.50 |
| 2026-08-06 12:00 |
07:24:49.03 |
+07:54:09.0 |
HIP 36042 |
23.94 |
| 2026-08-07 00:00 |
07:24:56.00 |
+07:53:24.1 |
HIP 36042 |
22.44 |
| 2026-08-07 12:00 |
07:25:02.94 |
+07:52:39.1 |
HIP 36042 |
20.99 |
| 2026-08-08 00:00 |
07:25:09.84 |
+07:51:53.8 |
HIP 36042 |
19.62 |
| 2026-08-08 12:00 |
07:25:16.72 |
+07:51:08.3 |
HIP 36042 |
18.34 |
| 2026-08-09 00:00 |
07:25:23.56 |
+07:50:22.7 |
HIP 36042 |
17.16 |
| 2026-08-09 12:00 |
07:25:30.37 |
+07:49:36.8 |
HIP 36042 |
16.10 |
| 2026-08-10 00:00 |
07:25:37.15 |
+07:48:50.8 |
HIP 36042 |
15.20 |
| 2026-08-10 12:00 |
07:25:43.89 |
+07:48:04.6 |
HIP 36042 |
14.48 |
| 2026-08-11 00:00 |
07:25:50.60 |
+07:47:18.2 |
HIP 36042 |
13.95 |
| 2026-08-11 12:00 |
07:25:57.27 |
+07:46:31.7 |
HIP 36042 |
13.65 |
| 2026-08-12 00:00 |
07:26:03.91 |
+07:45:44.9 |
HIP 36042 |
13.59 |
| 2026-08-12 12:00 |
07:26:10.51 |
+07:44:58.0 |
HIP 36042 |
13.75 |
| 2026-08-13 00:00 |
07:26:17.08 |
+07:44:10.9 |
HIP 36042 |
14.14 |
| 2026-08-13 12:00 |
07:26:23.60 |
+07:43:23.7 |
HIP 36042 |
14.74 |
| 2026-08-14 00:00 |
07:26:30.09 |
+07:42:36.2 |
HIP 36042 |
15.51 |
| 2026-08-14 12:00 |
07:26:36.54 |
+07:41:48.6 |
HIP 36042 |
16.44 |
| 2026-08-15 00:00 |
07:26:42.96 |
+07:41:00.9 |
HIP 36042 |
17.48 |
| 2026-08-15 12:00 |
07:26:49.33 |
+07:40:13.0 |
HIP 36042 |
18.63 |
| 2026-08-16 00:00 |
07:26:55.67 |
+07:39:24.9 |
HIP 36191 |
19.59 |
| 2026-08-16 12:00 |
07:27:01.96 |
+07:38:36.6 |
HIP 36191 |
18.58 |
| 2026-08-17 00:00 |
07:27:08.22 |
+07:37:48.2 |
HIP 36191 |
17.68 |
| 2026-08-17 12:00 |
07:27:14.43 |
+07:36:59.7 |
HIP 36191 |
16.92 |
| 2026-08-18 00:00 |
07:27:20.60 |
+07:36:10.9 |
HIP 36191 |
16.30 |
| 2026-08-18 12:00 |
07:27:26.73 |
+07:35:22.1 |
HIP 36191 |
15.84 |
| 2026-08-19 00:00 |
07:27:32.82 |
+07:34:33.1 |
HIP 36191 |
15.55 |