メタデータ
| 項目 |
値 |
| Designation |
P/2013 R3 (Catalina-PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-08-05T03:50:44.286720Z |
| Orbit solution date (soln_date, UTC) |
2022-11-07T07:13:07Z |
| Obs used |
324 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
30.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-10-13.0000000 |
| e |
0.27344549 |
| q (au) |
2.203607 |
| a (au) |
3.032955 |
| i (deg) |
0.898900 |
| Ω (om, deg) |
342.683923 |
| ω (w, deg) |
8.238778 |
| M (ma, deg) |
12.845309 |
等級
散乱 + 全体線形
$$
M_a = (15.274 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.274 |
| n |
2.000 |
| gf |
0.968 |
| gb |
-0.824 |
| k |
0.999 |
| δ90 |
9.995 |
| 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 |
10:24:57.08 |
+09:54:30.0 |
HIP 50999 |
4.60 |
| 2026-07-29 12:00 |
10:25:27.97 |
+09:51:28.8 |
HIP 50999 |
9.82 |
| 2026-07-30 00:00 |
10:25:58.90 |
+09:48:27.2 |
HIP 51004 |
17.15 |
| 2026-07-30 12:00 |
10:26:29.86 |
+09:45:25.2 |
HIP 51213 |
17.04 |
| 2026-07-31 00:00 |
10:27:00.85 |
+09:42:22.8 |
HIP 51213 |
9.98 |
| 2026-07-31 12:00 |
10:27:31.87 |
+09:39:20.0 |
HIP 51213 |
6.65 |
| 2026-08-01 00:00 |
10:28:02.92 |
+09:36:16.8 |
HIP 51213 |
11.15 |
| 2026-08-01 12:00 |
10:28:34.01 |
+09:33:13.1 |
HIP 51316 |
5.44 |
| 2026-08-02 00:00 |
10:29:05.12 |
+09:30:09.1 |
HIP 51316 |
4.39 |
| 2026-08-02 12:00 |
10:29:36.26 |
+09:27:04.7 |
HIP 51316 |
12.07 |
| 2026-08-03 00:00 |
10:30:07.44 |
+09:23:59.8 |
HIP 51316 |
20.24 |
| 2026-08-03 12:00 |
10:30:38.64 |
+09:20:54.6 |
HIP 51582 |
22.59 |
| 2026-08-04 00:00 |
10:31:09.87 |
+09:17:49.0 |
HIP 51582 |
16.29 |
| 2026-08-04 12:00 |
10:31:41.13 |
+09:14:43.0 |
HIP 51582 |
12.57 |
| 2026-08-05 00:00 |
10:32:12.41 |
+09:11:36.7 |
HIP 51624 |
11.23 |
| 2026-08-05 12:00 |
10:32:43.73 |
+09:08:29.9 |
HIP 51624 |
9.97 |
| 2026-08-06 00:00 |
10:33:15.07 |
+09:05:22.8 |
HIP 51624 |
14.55 |
| 2026-08-06 12:00 |
10:33:46.43 |
+09:02:15.3 |
HIP 51624 |
21.53 |
| 2026-08-07 00:00 |
10:34:17.83 |
+08:59:07.4 |
HIP 51802 |
22.89 |
| 2026-08-07 12:00 |
10:34:49.24 |
+08:55:59.2 |
HIP 51802 |
17.26 |
| 2026-08-08 00:00 |
10:35:20.69 |
+08:52:50.5 |
HIP 51802 |
14.55 |
| 2026-08-08 12:00 |
10:35:52.15 |
+08:49:41.6 |
HIP 51802 |
16.32 |
| 2026-08-09 00:00 |
10:36:23.64 |
+08:46:32.2 |
HIP 51802 |
21.48 |
| 2026-08-09 12:00 |
10:36:55.16 |
+08:43:22.6 |
HIP 51802 |
28.25 |
| 2026-08-10 00:00 |
10:37:26.69 |
+08:40:12.5 |
HIP 51922 |
33.61 |
| 2026-08-10 12:00 |
10:37:58.25 |
+08:37:02.2 |
HIP 52187 |
29.03 |
| 2026-08-11 00:00 |
10:38:29.83 |
+08:33:51.4 |
HIP 52187 |
24.48 |
| 2026-08-11 12:00 |
10:39:01.44 |
+08:30:40.4 |
HIP 52187 |
22.31 |
| 2026-08-12 00:00 |
10:39:33.06 |
+08:27:29.0 |
HIP 52187 |
23.21 |
| 2026-08-12 12:00 |
10:40:04.70 |
+08:24:17.3 |
HIP 52315 |
21.66 |
| 2026-08-13 00:00 |
10:40:36.36 |
+08:21:05.2 |
HIP 52315 |
17.21 |
| 2026-08-13 12:00 |
10:41:08.04 |
+08:17:52.9 |
HIP 52350 |
13.62 |
| 2026-08-14 00:00 |
10:41:39.74 |
+08:14:40.2 |
HIP 52350 |
10.90 |
| 2026-08-14 12:00 |
10:42:11.45 |
+08:11:27.2 |
HIP 52387 |
9.56 |
| 2026-08-15 00:00 |
10:42:43.18 |
+08:08:13.9 |
HIP 52387 |
12.28 |
| 2026-08-15 12:00 |
10:43:14.93 |
+08:05:00.4 |
HIP 52387 |
18.82 |
| 2026-08-16 00:00 |
10:43:46.69 |
+08:01:46.5 |
HIP 52604 |
24.64 |
| 2026-08-16 12:00 |
10:44:18.47 |
+07:58:32.3 |
HIP 52604 |
16.70 |
| 2026-08-17 00:00 |
10:44:50.26 |
+07:55:17.8 |
HIP 52604 |
9.74 |
| 2026-08-17 12:00 |
10:45:22.07 |
+07:52:03.1 |
HIP 52604 |
7.48 |
| 2026-08-18 00:00 |
10:45:53.89 |
+07:48:48.1 |
HIP 52604 |
12.74 |
| 2026-08-18 12:00 |
10:46:25.72 |
+07:45:32.8 |
HIP 52616 |
19.53 |
| 2026-08-19 00:00 |
10:46:57.56 |
+07:42:17.2 |
HIP 52616 |
23.71 |