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) |
| 2026-07-29 00:00 |
16:43:01.09 |
-08:49:51.2 |
HIP 81865 |
5.63 |
| 2026-07-29 12:00 |
16:42:55.88 |
-08:50:24.5 |
HIP 81843 |
6.80 |
| 2026-07-30 00:00 |
16:42:50.78 |
-08:50:58.1 |
HIP 81843 |
6.64 |
| 2026-07-30 12:00 |
16:42:45.80 |
-08:51:32.2 |
HIP 81843 |
6.73 |
| 2026-07-31 00:00 |
16:42:40.93 |
-08:52:06.6 |
HIP 81843 |
7.07 |
| 2026-07-31 12:00 |
16:42:36.18 |
-08:52:41.5 |
HIP 81843 |
7.60 |
| 2026-08-01 00:00 |
16:42:31.55 |
-08:53:16.7 |
HIP 81843 |
8.27 |
| 2026-08-01 12:00 |
16:42:27.03 |
-08:53:52.3 |
HIP 81843 |
9.05 |
| 2026-08-02 00:00 |
16:42:22.63 |
-08:54:28.3 |
HIP 81843 |
9.90 |
| 2026-08-02 12:00 |
16:42:18.34 |
-08:55:04.7 |
HIP 81843 |
10.80 |
| 2026-08-03 00:00 |
16:42:14.18 |
-08:55:41.5 |
HIP 81843 |
11.72 |
| 2026-08-03 12:00 |
16:42:10.13 |
-08:56:18.6 |
HIP 81843 |
12.66 |
| 2026-08-04 00:00 |
16:42:06.19 |
-08:56:56.1 |
HIP 81843 |
13.61 |
| 2026-08-04 12:00 |
16:42:02.38 |
-08:57:34.0 |
HIP 81843 |
14.56 |
| 2026-08-05 00:00 |
16:41:58.68 |
-08:58:12.3 |
HIP 81843 |
15.51 |
| 2026-08-05 12:00 |
16:41:55.11 |
-08:58:50.9 |
HIP 81843 |
16.44 |
| 2026-08-06 00:00 |
16:41:51.65 |
-08:59:29.9 |
HIP 81843 |
17.37 |
| 2026-08-06 12:00 |
16:41:48.31 |
-09:00:09.2 |
HIP 81843 |
18.29 |
| 2026-08-07 00:00 |
16:41:45.09 |
-09:00:48.9 |
HIP 81843 |
19.19 |
| 2026-08-07 12:00 |
16:41:41.99 |
-09:01:29.0 |
HIP 81843 |
20.08 |
| 2026-08-08 00:00 |
16:41:39.01 |
-09:02:09.3 |
HIP 81843 |
20.95 |
| 2026-08-08 12:00 |
16:41:36.16 |
-09:02:50.1 |
HIP 81843 |
21.80 |
| 2026-08-09 00:00 |
16:41:33.42 |
-09:03:31.2 |
HIP 81843 |
22.64 |
| 2026-08-09 12:00 |
16:41:30.81 |
-09:04:12.6 |
HIP 81843 |
23.46 |
| 2026-08-10 00:00 |
16:41:28.31 |
-09:04:54.4 |
HIP 81843 |
24.26 |
| 2026-08-10 12:00 |
16:41:25.94 |
-09:05:36.4 |
HIP 81843 |
25.05 |
| 2026-08-11 00:00 |
16:41:23.69 |
-09:06:18.9 |
HIP 81843 |
25.81 |
| 2026-08-11 12:00 |
16:41:21.56 |
-09:07:01.6 |
HIP 81843 |
26.56 |
| 2026-08-12 00:00 |
16:41:19.56 |
-09:07:44.7 |
HIP 81843 |
27.29 |
| 2026-08-12 12:00 |
16:41:17.68 |
-09:08:28.0 |
HIP 81843 |
28.01 |
| 2026-08-13 00:00 |
16:41:15.92 |
-09:09:11.7 |
HIP 81843 |
28.70 |
| 2026-08-13 12:00 |
16:41:14.28 |
-09:09:55.7 |
HIP 81843 |
29.38 |
| 2026-08-14 00:00 |
16:41:12.77 |
-09:10:40.0 |
HIP 81843 |
30.05 |
| 2026-08-14 12:00 |
16:41:11.38 |
-09:11:24.6 |
HIP 81843 |
30.69 |
| 2026-08-15 00:00 |
16:41:10.11 |
-09:12:09.5 |
HIP 81580 |
30.80 |
| 2026-08-15 12:00 |
16:41:08.97 |
-09:12:54.7 |
HIP 81580 |
30.08 |
| 2026-08-16 00:00 |
16:41:07.94 |
-09:13:40.2 |
HIP 81580 |
29.39 |
| 2026-08-16 12:00 |
16:41:07.05 |
-09:14:25.9 |
HIP 81580 |
28.72 |
| 2026-08-17 00:00 |
16:41:06.27 |
-09:15:11.9 |
HIP 81580 |
28.07 |
| 2026-08-17 12:00 |
16:41:05.62 |
-09:15:58.2 |
HIP 81580 |
27.46 |
| 2026-08-18 00:00 |
16:41:05.09 |
-09:16:44.8 |
HIP 81580 |
26.87 |
| 2026-08-18 12:00 |
16:41:04.68 |
-09:17:31.7 |
HIP 81580 |
26.32 |
| 2026-08-19 00:00 |
16:41:04.40 |
-09:18:18.8 |
HIP 81580 |
25.80 |