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) |
| 2026-03-26 00:00 |
13:40:15.57 |
-02:44:15.3 |
HIP 66686 |
21.96 |
| 2026-03-26 12:00 |
13:40:06.81 |
-02:43:01.3 |
HIP 66686 |
20.78 |
| 2026-03-27 00:00 |
13:39:58.00 |
-02:41:47.3 |
HIP 66581 |
18.74 |
| 2026-03-27 12:00 |
13:39:49.15 |
-02:40:33.3 |
HIP 66581 |
16.21 |
| 2026-03-28 00:00 |
13:39:40.26 |
-02:39:19.1 |
HIP 66581 |
13.68 |
| 2026-03-28 12:00 |
13:39:31.32 |
-02:38:04.9 |
HIP 66581 |
11.13 |
| 2026-03-29 00:00 |
13:39:22.35 |
-02:36:50.7 |
HIP 66581 |
8.59 |
| 2026-03-29 12:00 |
13:39:13.33 |
-02:35:36.4 |
HIP 66581 |
6.04 |
| 2026-03-30 00:00 |
13:39:04.28 |
-02:34:22.1 |
HIP 66581 |
3.53 |
| 2026-03-30 12:00 |
13:38:55.19 |
-02:33:07.8 |
HIP 66581 |
1.30 |
| 2026-03-31 00:00 |
13:38:46.06 |
-02:31:53.4 |
HIP 66581 |
2.08 |
| 2026-03-31 12:00 |
13:38:36.90 |
-02:30:39.1 |
HIP 66581 |
4.53 |
| 2026-04-01 00:00 |
13:38:27.70 |
-02:29:24.7 |
HIP 66581 |
7.10 |
| 2026-04-01 12:00 |
13:38:18.47 |
-02:28:10.3 |
HIP 66581 |
9.70 |
| 2026-04-02 00:00 |
13:38:09.21 |
-02:26:56.0 |
HIP 66581 |
12.31 |
| 2026-04-02 12:00 |
13:37:59.91 |
-02:25:41.6 |
HIP 66581 |
14.93 |
| 2026-04-03 00:00 |
13:37:50.59 |
-02:24:27.3 |
HIP 66581 |
17.57 |
| 2026-04-03 12:00 |
13:37:41.23 |
-02:23:13.0 |
HIP 66499 |
18.11 |
| 2026-04-04 00:00 |
13:37:31.85 |
-02:21:58.7 |
HIP 66499 |
17.46 |
| 2026-04-04 12:00 |
13:37:22.44 |
-02:20:44.5 |
HIP 66499 |
17.20 |
| 2026-04-05 00:00 |
13:37:13.00 |
-02:19:30.3 |
HIP 66499 |
17.35 |
| 2026-04-05 12:00 |
13:37:03.53 |
-02:18:16.2 |
HIP 66499 |
17.91 |
| 2026-04-06 00:00 |
13:36:54.05 |
-02:17:02.1 |
HIP 66499 |
18.84 |
| 2026-04-06 12:00 |
13:36:44.53 |
-02:15:48.1 |
HIP 66499 |
20.09 |
| 2026-04-07 00:00 |
13:36:35.00 |
-02:14:34.2 |
HIP 66499 |
21.60 |
| 2026-04-07 12:00 |
13:36:25.44 |
-02:13:20.4 |
HIP 66499 |
23.33 |
| 2026-04-08 00:00 |
13:36:15.87 |
-02:12:06.6 |
HIP 66499 |
25.24 |
| 2026-04-08 12:00 |
13:36:06.27 |
-02:10:53.0 |
HIP 66293 |
26.97 |
| 2026-04-09 00:00 |
13:35:56.66 |
-02:09:39.4 |
HIP 66293 |
27.00 |
| 2026-04-09 12:00 |
13:35:47.03 |
-02:08:26.0 |
HIP 66293 |
27.29 |
| 2026-04-10 00:00 |
13:35:37.38 |
-02:07:12.7 |
HIP 66293 |
27.84 |
| 2026-04-10 12:00 |
13:35:27.72 |
-02:05:59.5 |
HIP 66293 |
28.63 |
| 2026-04-11 00:00 |
13:35:18.05 |
-02:04:46.4 |
HIP 66293 |
29.65 |
| 2026-04-11 12:00 |
13:35:08.36 |
-02:03:33.5 |
HIP 66293 |
30.86 |
| 2026-04-12 00:00 |
13:34:58.66 |
-02:02:20.8 |
HIP 66293 |
32.26 |
| 2026-04-12 12:00 |
13:34:48.95 |
-02:01:08.2 |
HIP 66293 |
33.82 |
| 2026-04-13 00:00 |
13:34:39.23 |
-01:59:55.7 |
HIP 66293 |
35.51 |
| 2026-04-13 12:00 |
13:34:29.51 |
-01:58:43.4 |
HIP 66097 |
35.30 |
| 2026-04-14 00:00 |
13:34:19.77 |
-01:57:31.3 |
HIP 66097 |
34.72 |
| 2026-04-14 12:00 |
13:34:10.03 |
-01:56:19.4 |
HIP 66097 |
34.34 |
| 2026-04-15 00:00 |
13:34:00.29 |
-01:55:07.7 |
HIP 66097 |
34.18 |
| 2026-04-15 12:00 |
13:33:50.54 |
-01:53:56.2 |
HIP 66097 |
34.22 |
| 2026-04-16 00:00 |
13:33:40.79 |
-01:52:44.9 |
HIP 66097 |
34.47 |