メタデータ
| 項目 |
値 |
| Designation |
403P/CATALINA |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-09-15T08:40:13.650240Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:05Z |
| Obs used |
215 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
23.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-10-15T10:46:13.209600Z |
| Discovery magnitude (MPC) |
19.79 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-02-13.0000000 |
| e |
0.50365776 |
| q (au) |
2.684426 |
| a (au) |
5.408417 |
| i (deg) |
12.323320 |
| Ω (om, deg) |
163.851340 |
| ω (w, deg) |
277.851227 |
| M (ma, deg) |
200.037302 |
等級
散乱 + 全体線形
$$
M_a = (12.145 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.145 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.540 |
| k |
0.800 |
| 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) |
| 2026-09-20 00:00 |
16:44:53.11 |
-10:14:41.8 |
HIP 81869 |
31.80 |
| 2026-09-20 12:00 |
16:45:00.34 |
-10:15:37.6 |
HIP 81869 |
33.75 |
| 2026-09-21 00:00 |
16:45:07.69 |
-10:16:33.5 |
HIP 81869 |
35.72 |
| 2026-09-21 12:00 |
16:45:15.13 |
-10:17:29.3 |
HIP 82197 |
36.69 |
| 2026-09-22 00:00 |
16:45:22.68 |
-10:18:25.2 |
HIP 82197 |
34.62 |
| 2026-09-22 12:00 |
16:45:30.33 |
-10:19:21.1 |
HIP 82197 |
32.52 |
| 2026-09-23 00:00 |
16:45:38.09 |
-10:20:16.9 |
HIP 82197 |
30.41 |
| 2026-09-23 12:00 |
16:45:45.94 |
-10:21:12.7 |
HIP 82197 |
28.27 |
| 2026-09-24 00:00 |
16:45:53.90 |
-10:22:08.6 |
HIP 82197 |
26.11 |
| 2026-09-24 12:00 |
16:46:01.95 |
-10:23:04.4 |
HIP 82197 |
23.93 |
| 2026-09-25 00:00 |
16:46:10.11 |
-10:24:00.2 |
HIP 82197 |
21.73 |
| 2026-09-25 12:00 |
16:46:18.36 |
-10:24:55.9 |
HIP 82197 |
19.50 |
| 2026-09-26 00:00 |
16:46:26.72 |
-10:25:51.6 |
HIP 82197 |
17.26 |
| 2026-09-26 12:00 |
16:46:35.17 |
-10:26:47.3 |
HIP 82197 |
15.00 |
| 2026-09-27 00:00 |
16:46:43.72 |
-10:27:43.0 |
HIP 82197 |
12.72 |
| 2026-09-27 12:00 |
16:46:52.37 |
-10:28:38.6 |
HIP 82197 |
10.42 |
| 2026-09-28 00:00 |
16:47:01.11 |
-10:29:34.2 |
HIP 82197 |
8.11 |
| 2026-09-28 12:00 |
16:47:09.96 |
-10:30:29.8 |
HIP 82197 |
5.80 |
| 2026-09-29 00:00 |
16:47:18.89 |
-10:31:25.2 |
HIP 82197 |
3.55 |
| 2026-09-29 12:00 |
16:47:27.93 |
-10:32:20.7 |
HIP 82197 |
1.68 |
| 2026-09-30 00:00 |
16:47:37.06 |
-10:33:16.1 |
HIP 82197 |
2.15 |
| 2026-09-30 12:00 |
16:47:46.28 |
-10:34:11.4 |
HIP 82197 |
4.29 |
| 2026-10-01 00:00 |
16:47:55.60 |
-10:35:06.7 |
HIP 82197 |
6.66 |
| 2026-10-01 12:00 |
16:48:05.01 |
-10:36:01.9 |
HIP 82197 |
9.10 |
| 2026-10-02 00:00 |
16:48:14.52 |
-10:36:57.0 |
HIP 82197 |
11.58 |
| 2026-10-02 12:00 |
16:48:24.12 |
-10:37:52.1 |
HIP 82197 |
14.10 |
| 2026-10-03 00:00 |
16:48:33.81 |
-10:38:47.1 |
HIP 82197 |
16.63 |
| 2026-10-03 12:00 |
16:48:43.59 |
-10:39:42.0 |
HIP 82369 |
17.85 |
| 2026-10-04 00:00 |
16:48:53.47 |
-10:40:36.8 |
HIP 82369 |
15.27 |
| 2026-10-04 12:00 |
16:49:03.43 |
-10:41:31.6 |
HIP 82369 |
12.66 |
| 2026-10-05 00:00 |
16:49:13.49 |
-10:42:26.3 |
HIP 82369 |
10.04 |
| 2026-10-05 12:00 |
16:49:23.64 |
-10:43:20.8 |
HIP 82369 |
7.41 |
| 2026-10-06 00:00 |
16:49:33.87 |
-10:44:15.3 |
HIP 82369 |
4.79 |
| 2026-10-06 12:00 |
16:49:44.20 |
-10:45:09.7 |
HIP 82369 |
2.30 |
| 2026-10-07 00:00 |
16:49:54.62 |
-10:46:04.0 |
HIP 82369 |
1.45 |
| 2026-10-07 12:00 |
16:50:05.12 |
-10:46:58.2 |
HIP 82369 |
3.72 |
| 2026-10-08 00:00 |
16:50:15.71 |
-10:47:52.3 |
HIP 82369 |
6.39 |
| 2026-10-08 12:00 |
16:50:26.39 |
-10:48:46.2 |
HIP 82369 |
9.12 |
| 2026-10-09 00:00 |
16:50:37.16 |
-10:49:40.1 |
HIP 82369 |
11.90 |
| 2026-10-09 12:00 |
16:50:48.01 |
-10:50:33.8 |
HIP 82369 |
14.70 |
| 2026-10-10 00:00 |
16:50:58.94 |
-10:51:27.4 |
HIP 82369 |
17.52 |
| 2026-10-10 12:00 |
16:51:09.97 |
-10:52:20.9 |
HIP 82369 |
20.37 |
| 2026-10-11 00:00 |
16:51:21.07 |
-10:53:14.2 |
HIP 82369 |
23.23 |