C/2022 L1 (Catalina)
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 · 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) |
| 2026-02-03 00:00 |
07:14:29.66 |
+08:00:27.9 |
HIP 35008 |
1.81 |
| 2026-02-03 12:00 |
07:14:18.15 |
+08:00:47.1 |
HIP 35008 |
4.01 |
| 2026-02-04 00:00 |
07:14:06.69 |
+08:01:06.4 |
HIP 35008 |
6.71 |
| 2026-02-04 12:00 |
07:13:55.30 |
+08:01:26.0 |
HIP 35008 |
9.49 |
| 2026-02-05 00:00 |
07:13:43.98 |
+08:01:45.8 |
HIP 35008 |
12.28 |
| 2026-02-05 12:00 |
07:13:32.72 |
+08:02:05.7 |
HIP 35008 |
15.06 |
| 2026-02-06 00:00 |
07:13:21.52 |
+08:02:25.9 |
HIP 35008 |
17.84 |
| 2026-02-06 12:00 |
07:13:10.39 |
+08:02:46.2 |
HIP 35008 |
20.60 |
| 2026-02-07 00:00 |
07:12:59.32 |
+08:03:06.7 |
HIP 35008 |
23.36 |
| 2026-02-07 12:00 |
07:12:48.32 |
+08:03:27.4 |
HIP 35008 |
26.09 |
| 2026-02-08 00:00 |
07:12:37.39 |
+08:03:48.3 |
HIP 35008 |
28.81 |
| 2026-02-08 12:00 |
07:12:26.53 |
+08:04:09.3 |
HIP 35008 |
31.52 |
| 2026-02-09 00:00 |
07:12:15.73 |
+08:04:30.6 |
HIP 34903 |
32.70 |
| 2026-02-09 12:00 |
07:12:05.01 |
+08:04:51.9 |
HIP 34903 |
33.72 |
| 2026-02-10 00:00 |
07:11:54.36 |
+08:05:13.5 |
HIP 34903 |
34.90 |
| 2026-02-10 12:00 |
07:11:43.78 |
+08:05:35.2 |
HIP 34597 |
34.29 |
| 2026-02-11 00:00 |
07:11:33.28 |
+08:05:57.1 |
HIP 34597 |
32.59 |
| 2026-02-11 12:00 |
07:11:22.84 |
+08:06:19.1 |
HIP 34597 |
31.04 |
| 2026-02-12 00:00 |
07:11:12.49 |
+08:06:41.2 |
HIP 34597 |
29.65 |
| 2026-02-12 12:00 |
07:11:02.20 |
+08:07:03.5 |
HIP 34597 |
28.45 |
| 2026-02-13 00:00 |
07:10:52.00 |
+08:07:26.0 |
HIP 34597 |
27.44 |
| 2026-02-13 12:00 |
07:10:41.86 |
+08:07:48.6 |
HIP 34597 |
26.65 |
| 2026-02-14 00:00 |
07:10:31.81 |
+08:08:11.3 |
HIP 34597 |
26.09 |
| 2026-02-14 12:00 |
07:10:21.84 |
+08:08:34.1 |
HIP 34597 |
25.78 |
| 2026-02-15 00:00 |
07:10:11.94 |
+08:08:57.1 |
HIP 34597 |
25.71 |
| 2026-02-15 12:00 |
07:10:02.12 |
+08:09:20.2 |
HIP 34597 |
25.88 |
| 2026-02-16 00:00 |
07:09:52.39 |
+08:09:43.4 |
HIP 34597 |
26.28 |
| 2026-02-16 12:00 |
07:09:42.73 |
+08:10:06.8 |
HIP 34441 |
26.32 |
| 2026-02-17 00:00 |
07:09:33.16 |
+08:10:30.2 |
HIP 34441 |
24.85 |
| 2026-02-17 12:00 |
07:09:23.67 |
+08:10:53.7 |
HIP 34441 |
23.55 |
| 2026-02-18 00:00 |
07:09:14.26 |
+08:11:17.4 |
HIP 34441 |
22.45 |
| 2026-02-18 12:00 |
07:09:04.93 |
+08:11:41.1 |
HIP 34441 |
21.55 |
| 2026-02-19 00:00 |
07:08:55.69 |
+08:12:05.0 |
HIP 34441 |
20.90 |
| 2026-02-19 12:00 |
07:08:46.53 |
+08:12:28.9 |
HIP 34441 |
20.49 |
| 2026-02-20 00:00 |
07:08:37.46 |
+08:12:52.9 |
HIP 34441 |
20.34 |
| 2026-02-20 12:00 |
07:08:28.48 |
+08:13:17.1 |
HIP 34441 |
20.46 |
| 2026-02-21 00:00 |
07:08:19.58 |
+08:13:41.2 |
HIP 34441 |
20.81 |
| 2026-02-21 12:00 |
07:08:10.77 |
+08:14:05.5 |
HIP 34441 |
21.40 |
| 2026-02-22 00:00 |
07:08:02.04 |
+08:14:29.8 |
HIP 34419 |
22.04 |
| 2026-02-22 12:00 |
07:07:53.40 |
+08:14:54.2 |
HIP 34419 |
21.89 |
| 2026-02-23 00:00 |
07:07:44.86 |
+08:15:18.7 |
HIP 34419 |
21.96 |
| 2026-02-23 12:00 |
07:07:36.39 |
+08:15:43.2 |
HIP 34419 |
22.23 |
| 2026-02-24 00:00 |
07:07:28.02 |
+08:16:07.8 |
HIP 34419 |
22.68 |