メタデータ
| 項目 |
値 |
| Designation |
330P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-08-31T23:24:07.214400Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:38Z |
| Obs used |
342 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
13.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-03-04.0000000 |
| e |
0.54934611 |
| q (au) |
2.969730 |
| a (au) |
6.589825 |
| i (deg) |
15.547744 |
| Ω (om, deg) |
294.337435 |
| ω (w, deg) |
186.716087 |
| M (ma, deg) |
243.009233 |
等級
散乱 + 全体線形
$$
M_a = (9.019 + 5.531\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.019 |
| n |
5.531 |
| gf |
1.000 |
| gb |
-0.909 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-03-26 00:00 |
20:59:18.62 |
-12:41:38.4 |
HIP 103640 |
23.20 |
| 2026-03-26 12:00 |
20:59:27.40 |
-12:40:41.6 |
HIP 103640 |
23.38 |
| 2026-03-27 00:00 |
20:59:36.11 |
-12:39:45.0 |
HIP 103719 |
21.97 |
| 2026-03-27 12:00 |
20:59:44.76 |
-12:38:48.6 |
HIP 103719 |
19.69 |
| 2026-03-28 00:00 |
20:59:53.34 |
-12:37:52.4 |
HIP 103719 |
17.43 |
| 2026-03-28 12:00 |
21:00:01.86 |
-12:36:56.3 |
HIP 103719 |
15.20 |
| 2026-03-29 00:00 |
21:00:10.30 |
-12:36:00.4 |
HIP 103719 |
13.01 |
| 2026-03-29 12:00 |
21:00:18.69 |
-12:35:04.6 |
HIP 103719 |
10.86 |
| 2026-03-30 00:00 |
21:00:27.00 |
-12:34:09.1 |
HIP 103719 |
8.78 |
| 2026-03-30 12:00 |
21:00:35.25 |
-12:33:13.7 |
HIP 103719 |
6.80 |
| 2026-03-31 00:00 |
21:00:43.42 |
-12:32:18.5 |
HIP 103719 |
5.05 |
| 2026-03-31 12:00 |
21:00:51.53 |
-12:31:23.5 |
HIP 103719 |
3.79 |
| 2026-04-01 00:00 |
21:00:59.57 |
-12:30:28.7 |
HIP 103719 |
3.58 |
| 2026-04-01 12:00 |
21:01:07.55 |
-12:29:34.1 |
HIP 103719 |
4.53 |
| 2026-04-02 00:00 |
21:01:15.45 |
-12:28:39.7 |
HIP 103719 |
6.11 |
| 2026-04-02 12:00 |
21:01:23.28 |
-12:27:45.5 |
HIP 103719 |
7.94 |
| 2026-04-03 00:00 |
21:01:31.04 |
-12:26:51.4 |
HIP 103719 |
9.87 |
| 2026-04-03 12:00 |
21:01:38.73 |
-12:25:57.6 |
HIP 103834 |
11.57 |
| 2026-04-04 00:00 |
21:01:46.34 |
-12:25:04.0 |
HIP 103834 |
9.84 |
| 2026-04-04 12:00 |
21:01:53.89 |
-12:24:10.6 |
HIP 103834 |
8.27 |
| 2026-04-05 00:00 |
21:02:01.36 |
-12:23:17.4 |
HIP 103834 |
6.97 |
| 2026-04-05 12:00 |
21:02:08.76 |
-12:22:24.5 |
HIP 103834 |
6.10 |
| 2026-04-06 00:00 |
21:02:16.09 |
-12:21:31.7 |
HIP 103834 |
5.82 |
| 2026-04-06 12:00 |
21:02:23.34 |
-12:20:39.2 |
HIP 103834 |
6.20 |
| 2026-04-07 00:00 |
21:02:30.52 |
-12:19:46.9 |
HIP 103834 |
7.13 |
| 2026-04-07 12:00 |
21:02:37.63 |
-12:18:54.8 |
HIP 103834 |
8.40 |
| 2026-04-08 00:00 |
21:02:44.66 |
-12:18:02.9 |
HIP 103834 |
9.89 |
| 2026-04-08 12:00 |
21:02:51.61 |
-12:17:11.3 |
HIP 103834 |
11.49 |
| 2026-04-09 00:00 |
21:02:58.49 |
-12:16:19.9 |
HIP 103834 |
13.15 |
| 2026-04-09 12:00 |
21:03:05.29 |
-12:15:28.7 |
HIP 103834 |
14.86 |
| 2026-04-10 00:00 |
21:03:12.02 |
-12:14:37.8 |
HIP 103834 |
16.58 |
| 2026-04-10 12:00 |
21:03:18.67 |
-12:13:47.1 |
HIP 103834 |
18.32 |
| 2026-04-11 00:00 |
21:03:25.24 |
-12:12:56.7 |
HIP 103834 |
20.05 |
| 2026-04-11 12:00 |
21:03:31.73 |
-12:12:06.5 |
HIP 103834 |
21.78 |
| 2026-04-12 00:00 |
21:03:38.14 |
-12:11:16.6 |
HIP 103834 |
23.50 |
| 2026-04-12 12:00 |
21:03:44.48 |
-12:10:26.9 |
HIP 103834 |
25.21 |
| 2026-04-13 00:00 |
21:03:50.73 |
-12:09:37.5 |
HIP 103834 |
26.91 |
| 2026-04-13 12:00 |
21:03:56.91 |
-12:08:48.3 |
HIP 103834 |
28.60 |
| 2026-04-14 00:00 |
21:04:03.01 |
-12:07:59.4 |
HIP 103834 |
30.27 |
| 2026-04-14 12:00 |
21:04:09.02 |
-12:07:10.8 |
HIP 103834 |
31.93 |
| 2026-04-15 00:00 |
21:04:14.96 |
-12:06:22.5 |
HIP 103834 |
33.57 |
| 2026-04-15 12:00 |
21:04:20.81 |
-12:05:34.4 |
HIP 104186 |
32.76 |
| 2026-04-16 00:00 |
21:04:26.58 |
-12:04:46.6 |
HIP 104186 |
31.19 |