メタデータ
| 項目 |
値 |
| Designation |
C/2014 N2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-10-08T05:29:04.395840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:57Z |
| Obs used |
50 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
15.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-08-04.0000000 |
| e |
0.99954235 |
| q (au) |
2.184402 |
| a (au) |
4773.044196 |
| i (deg) |
133.013197 |
| Ω (om, deg) |
143.804180 |
| ω (w, deg) |
237.860749 |
| M (ma, deg) |
359.999805 |
等級
散乱 + 全体線形
$$
M_a = (19.001 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.001 |
| 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 |
09:02:43.36 |
+35:24:16.6 |
HIP 44388 |
3.28 |
| 2026-09-20 12:00 |
09:02:46.66 |
+35:24:23.2 |
HIP 44388 |
3.88 |
| 2026-09-21 00:00 |
09:02:49.94 |
+35:24:29.9 |
HIP 44388 |
4.49 |
| 2026-09-21 12:00 |
09:02:53.19 |
+35:24:36.9 |
HIP 44388 |
5.12 |
| 2026-09-22 00:00 |
09:02:56.41 |
+35:24:44.1 |
HIP 44388 |
5.76 |
| 2026-09-22 12:00 |
09:02:59.60 |
+35:24:51.5 |
HIP 44388 |
6.40 |
| 2026-09-23 00:00 |
09:03:02.76 |
+35:24:59.2 |
HIP 44388 |
7.03 |
| 2026-09-23 12:00 |
09:03:05.90 |
+35:25:07.1 |
HIP 44388 |
7.67 |
| 2026-09-24 00:00 |
09:03:09.00 |
+35:25:15.1 |
HIP 44388 |
8.31 |
| 2026-09-24 12:00 |
09:03:12.07 |
+35:25:23.5 |
HIP 44388 |
8.94 |
| 2026-09-25 00:00 |
09:03:15.11 |
+35:25:32.0 |
HIP 44388 |
9.57 |
| 2026-09-25 12:00 |
09:03:18.12 |
+35:25:40.7 |
HIP 44388 |
10.19 |
| 2026-09-26 00:00 |
09:03:21.11 |
+35:25:49.7 |
HIP 44388 |
10.82 |
| 2026-09-26 12:00 |
09:03:24.06 |
+35:25:58.9 |
HIP 44388 |
11.43 |
| 2026-09-27 00:00 |
09:03:26.97 |
+35:26:08.3 |
HIP 44388 |
12.05 |
| 2026-09-27 12:00 |
09:03:29.86 |
+35:26:18.0 |
HIP 44388 |
12.65 |
| 2026-09-28 00:00 |
09:03:32.72 |
+35:26:27.9 |
HIP 44388 |
13.26 |
| 2026-09-28 12:00 |
09:03:35.54 |
+35:26:37.9 |
HIP 44388 |
13.86 |
| 2026-09-29 00:00 |
09:03:38.33 |
+35:26:48.3 |
HIP 44388 |
14.45 |
| 2026-09-29 12:00 |
09:03:41.09 |
+35:26:58.8 |
HIP 44388 |
15.04 |
| 2026-09-30 00:00 |
09:03:43.82 |
+35:27:09.5 |
HIP 44388 |
15.62 |
| 2026-09-30 12:00 |
09:03:46.51 |
+35:27:20.5 |
HIP 44388 |
16.20 |
| 2026-10-01 00:00 |
09:03:49.17 |
+35:27:31.7 |
HIP 44388 |
16.77 |
| 2026-10-01 12:00 |
09:03:51.80 |
+35:27:43.1 |
HIP 44388 |
17.34 |
| 2026-10-02 00:00 |
09:03:54.39 |
+35:27:54.8 |
HIP 44388 |
17.90 |
| 2026-10-02 12:00 |
09:03:56.96 |
+35:28:06.6 |
HIP 44388 |
18.46 |
| 2026-10-03 00:00 |
09:03:59.48 |
+35:28:18.7 |
HIP 44388 |
19.01 |
| 2026-10-03 12:00 |
09:04:01.97 |
+35:28:31.0 |
HIP 44388 |
19.56 |
| 2026-10-04 00:00 |
09:04:04.43 |
+35:28:43.6 |
HIP 44388 |
20.10 |
| 2026-10-04 12:00 |
09:04:06.85 |
+35:28:56.3 |
HIP 44388 |
20.64 |
| 2026-10-05 00:00 |
09:04:09.24 |
+35:29:09.3 |
HIP 44388 |
21.17 |
| 2026-10-05 12:00 |
09:04:11.60 |
+35:29:22.5 |
HIP 44388 |
21.69 |
| 2026-10-06 00:00 |
09:04:13.91 |
+35:29:35.9 |
HIP 44388 |
22.21 |
| 2026-10-06 12:00 |
09:04:16.19 |
+35:29:49.5 |
HIP 44388 |
22.72 |
| 2026-10-07 00:00 |
09:04:18.44 |
+35:30:03.4 |
HIP 44388 |
23.23 |
| 2026-10-07 12:00 |
09:04:20.65 |
+35:30:17.5 |
HIP 44388 |
23.73 |
| 2026-10-08 00:00 |
09:04:22.82 |
+35:30:31.8 |
HIP 44388 |
24.23 |
| 2026-10-08 12:00 |
09:04:24.96 |
+35:30:46.3 |
HIP 44388 |
24.72 |
| 2026-10-09 00:00 |
09:04:27.06 |
+35:31:01.1 |
HIP 44388 |
25.21 |
| 2026-10-09 12:00 |
09:04:29.12 |
+35:31:16.0 |
HIP 44388 |
25.69 |
| 2026-10-10 00:00 |
09:04:31.14 |
+35:31:31.2 |
HIP 44388 |
26.17 |
| 2026-10-10 12:00 |
09:04:33.13 |
+35:31:46.6 |
HIP 44388 |
26.64 |
| 2026-10-11 00:00 |
09:04:35.08 |
+35:32:02.2 |
HIP 44388 |
27.10 |