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) |
| 2026-06-01 00:00 |
21:06:52.34 |
-11:16:09.2 |
HIP 104459 |
40.49 |
| 2026-06-01 12:00 |
21:06:49.53 |
-11:15:56.1 |
HIP 104459 |
41.20 |
| 2026-06-02 00:00 |
21:06:46.63 |
-11:15:43.5 |
HIP 104132 |
41.28 |
| 2026-06-02 12:00 |
21:06:43.64 |
-11:15:31.4 |
HIP 104132 |
40.86 |
| 2026-06-03 00:00 |
21:06:40.55 |
-11:15:19.6 |
HIP 104132 |
40.44 |
| 2026-06-03 12:00 |
21:06:37.37 |
-11:15:08.3 |
HIP 104132 |
40.03 |
| 2026-06-04 00:00 |
21:06:34.09 |
-11:14:57.5 |
HIP 104132 |
39.64 |
| 2026-06-04 12:00 |
21:06:30.72 |
-11:14:47.1 |
HIP 104132 |
39.27 |
| 2026-06-05 00:00 |
21:06:27.26 |
-11:14:37.1 |
HIP 104132 |
38.90 |
| 2026-06-05 12:00 |
21:06:23.71 |
-11:14:27.5 |
HIP 104132 |
38.56 |
| 2026-06-06 00:00 |
21:06:20.06 |
-11:14:18.4 |
HIP 104132 |
38.24 |
| 2026-06-06 12:00 |
21:06:16.32 |
-11:14:09.8 |
HIP 104132 |
37.94 |
| 2026-06-07 00:00 |
21:06:12.49 |
-11:14:01.5 |
HIP 104132 |
37.67 |
| 2026-06-07 12:00 |
21:06:08.57 |
-11:13:53.8 |
HIP 104132 |
37.42 |
| 2026-06-08 00:00 |
21:06:04.55 |
-11:13:46.4 |
HIP 104132 |
37.20 |
| 2026-06-08 12:00 |
21:06:00.45 |
-11:13:39.5 |
HIP 104132 |
37.02 |
| 2026-06-09 00:00 |
21:05:56.25 |
-11:13:33.0 |
HIP 104132 |
36.86 |
| 2026-06-09 12:00 |
21:05:51.96 |
-11:13:27.0 |
HIP 104132 |
36.75 |
| 2026-06-10 00:00 |
21:05:47.58 |
-11:13:21.4 |
HIP 104132 |
36.67 |
| 2026-06-10 12:00 |
21:05:43.11 |
-11:13:16.3 |
HIP 104132 |
36.63 |
| 2026-06-11 00:00 |
21:05:38.55 |
-11:13:11.6 |
HIP 104132 |
36.63 |
| 2026-06-11 12:00 |
21:05:33.90 |
-11:13:07.3 |
HIP 104132 |
36.68 |
| 2026-06-12 00:00 |
21:05:29.16 |
-11:13:03.5 |
HIP 103900 |
35.95 |
| 2026-06-12 12:00 |
21:05:24.33 |
-11:13:00.1 |
HIP 103900 |
34.80 |
| 2026-06-13 00:00 |
21:05:19.42 |
-11:12:57.2 |
HIP 103900 |
33.63 |
| 2026-06-13 12:00 |
21:05:14.41 |
-11:12:54.7 |
HIP 103900 |
32.45 |
| 2026-06-14 00:00 |
21:05:09.32 |
-11:12:52.6 |
HIP 103900 |
31.25 |
| 2026-06-14 12:00 |
21:05:04.14 |
-11:12:51.0 |
HIP 103900 |
30.04 |
| 2026-06-15 00:00 |
21:04:58.87 |
-11:12:49.8 |
HIP 103900 |
28.82 |
| 2026-06-15 12:00 |
21:04:53.51 |
-11:12:49.0 |
HIP 103900 |
27.59 |
| 2026-06-16 00:00 |
21:04:48.07 |
-11:12:48.7 |
HIP 103900 |
26.34 |
| 2026-06-16 12:00 |
21:04:42.55 |
-11:12:48.8 |
HIP 103900 |
25.09 |
| 2026-06-17 00:00 |
21:04:36.93 |
-11:12:49.4 |
HIP 103900 |
23.84 |
| 2026-06-17 12:00 |
21:04:31.24 |
-11:12:50.4 |
HIP 103900 |
22.58 |
| 2026-06-18 00:00 |
21:04:25.46 |
-11:12:51.8 |
HIP 103900 |
21.33 |
| 2026-06-18 12:00 |
21:04:19.59 |
-11:12:53.6 |
HIP 103900 |
20.09 |
| 2026-06-19 00:00 |
21:04:13.65 |
-11:12:55.9 |
HIP 103900 |
18.85 |
| 2026-06-19 12:00 |
21:04:07.62 |
-11:12:58.6 |
HIP 103900 |
17.65 |
| 2026-06-20 00:00 |
21:04:01.51 |
-11:13:01.7 |
HIP 103900 |
16.47 |
| 2026-06-20 12:00 |
21:03:55.31 |
-11:13:05.2 |
HIP 103900 |
15.34 |
| 2026-06-21 00:00 |
21:03:49.04 |
-11:13:09.2 |
HIP 103900 |
14.28 |
| 2026-06-21 12:00 |
21:03:42.69 |
-11:13:13.6 |
HIP 103900 |
13.30 |
| 2026-06-22 00:00 |
21:03:36.26 |
-11:13:18.4 |
HIP 103900 |
12.43 |