メタデータ
| 項目 |
値 |
| Designation |
P/2013 N5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-07-02T10:34:14.370240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:37Z |
| Obs used |
28 |
| NEO |
- |
| M1 |
18.100 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-08-12.0000000 |
| e |
0.73191499 |
| q (au) |
1.823049 |
| a (au) |
6.800265 |
| i (deg) |
23.242478 |
| Ω (om, deg) |
187.746026 |
| ω (w, deg) |
176.242550 |
| M (ma, deg) |
2.254283 |
等級
散乱 + 全体線形
$$
M_a = (19.487 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.487 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
13:34:23.19 |
-02:16:50.4 |
HIP 66293 |
21.57 |
| 2026-09-20 12:00 |
13:34:34.31 |
-02:17:53.2 |
HIP 66293 |
19.18 |
| 2026-09-21 00:00 |
13:34:45.47 |
-02:18:56.0 |
HIP 66293 |
16.96 |
| 2026-09-21 12:00 |
13:34:56.67 |
-02:19:58.8 |
HIP 66293 |
15.01 |
| 2026-09-22 00:00 |
13:35:07.90 |
-02:21:01.7 |
HIP 66293 |
13.44 |
| 2026-09-22 12:00 |
13:35:19.17 |
-02:22:04.6 |
HIP 66293 |
12.41 |
| 2026-09-23 00:00 |
13:35:30.48 |
-02:23:07.6 |
HIP 66293 |
12.05 |
| 2026-09-23 12:00 |
13:35:41.82 |
-02:24:10.6 |
HIP 66293 |
12.45 |
| 2026-09-24 00:00 |
13:35:53.19 |
-02:25:13.6 |
HIP 66293 |
13.53 |
| 2026-09-24 12:00 |
13:36:04.60 |
-02:26:16.6 |
HIP 66293 |
15.15 |
| 2026-09-25 00:00 |
13:36:16.04 |
-02:27:19.7 |
HIP 66293 |
17.17 |
| 2026-09-25 12:00 |
13:36:27.52 |
-02:28:22.7 |
HIP 66293 |
19.47 |
| 2026-09-26 00:00 |
13:36:39.02 |
-02:29:25.8 |
HIP 66293 |
21.96 |
| 2026-09-26 12:00 |
13:36:50.56 |
-02:30:28.9 |
HIP 66293 |
24.59 |
| 2026-09-27 00:00 |
13:37:02.14 |
-02:31:32.0 |
HIP 66369 |
27.07 |
| 2026-09-27 12:00 |
13:37:13.74 |
-02:32:35.1 |
HIP 66581 |
25.15 |
| 2026-09-28 00:00 |
13:37:25.37 |
-02:33:38.2 |
HIP 66581 |
22.31 |
| 2026-09-28 12:00 |
13:37:37.04 |
-02:34:41.2 |
HIP 66581 |
19.53 |
| 2026-09-29 00:00 |
13:37:48.73 |
-02:35:44.3 |
HIP 66581 |
16.86 |
| 2026-09-29 12:00 |
13:38:00.46 |
-02:36:47.4 |
HIP 66581 |
14.35 |
| 2026-09-30 00:00 |
13:38:12.21 |
-02:37:50.4 |
HIP 66581 |
12.12 |
| 2026-09-30 12:00 |
13:38:23.99 |
-02:38:53.5 |
HIP 66581 |
10.36 |
| 2026-10-01 00:00 |
13:38:35.80 |
-02:39:56.5 |
HIP 66581 |
9.33 |
| 2026-10-01 12:00 |
13:38:47.64 |
-02:40:59.5 |
HIP 66581 |
9.30 |
| 2026-10-02 00:00 |
13:38:59.51 |
-02:42:02.4 |
HIP 66581 |
10.28 |
| 2026-10-02 12:00 |
13:39:11.40 |
-02:43:05.4 |
HIP 66581 |
12.02 |
| 2026-10-03 00:00 |
13:39:23.32 |
-02:44:08.3 |
HIP 66581 |
14.26 |
| 2026-10-03 12:00 |
13:39:35.26 |
-02:45:11.1 |
HIP 66581 |
16.80 |
| 2026-10-04 00:00 |
13:39:47.24 |
-02:46:13.9 |
HIP 66581 |
19.52 |
| 2026-10-04 12:00 |
13:39:59.23 |
-02:47:16.7 |
HIP 66581 |
22.37 |
| 2026-10-05 00:00 |
13:40:11.25 |
-02:48:19.4 |
HIP 66581 |
25.30 |
| 2026-10-05 12:00 |
13:40:23.30 |
-02:49:22.1 |
HIP 66833 |
22.44 |
| 2026-10-06 00:00 |
13:40:35.36 |
-02:50:24.7 |
HIP 66833 |
19.26 |
| 2026-10-06 12:00 |
13:40:47.46 |
-02:51:27.3 |
HIP 66833 |
16.07 |
| 2026-10-07 00:00 |
13:40:59.57 |
-02:52:29.7 |
HIP 66833 |
12.88 |
| 2026-10-07 12:00 |
13:41:11.70 |
-02:53:32.2 |
HIP 66833 |
9.69 |
| 2026-10-08 00:00 |
13:41:23.86 |
-02:54:34.5 |
HIP 66833 |
6.51 |
| 2026-10-08 12:00 |
13:41:36.04 |
-02:55:36.8 |
HIP 66833 |
3.39 |
| 2026-10-09 00:00 |
13:41:48.24 |
-02:56:39.0 |
HIP 66833 |
1.08 |
| 2026-10-09 12:00 |
13:42:00.45 |
-02:57:41.1 |
HIP 66833 |
3.40 |
| 2026-10-10 00:00 |
13:42:12.69 |
-02:58:43.1 |
HIP 66833 |
6.54 |
| 2026-10-10 12:00 |
13:42:24.95 |
-02:59:45.0 |
HIP 66833 |
9.74 |
| 2026-10-11 00:00 |
13:42:37.22 |
-03:00:46.8 |
HIP 66833 |
12.96 |