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) |
| 2026-07-29 00:00 |
08:55:09.38 |
+35:31:54.3 |
HIP 43685 |
14.99 |
| 2026-07-29 12:00 |
08:55:14.07 |
+35:31:40.8 |
HIP 43685 |
15.96 |
| 2026-07-30 00:00 |
08:55:18.76 |
+35:31:27.4 |
HIP 43685 |
16.92 |
| 2026-07-30 12:00 |
08:55:23.46 |
+35:31:14.2 |
HIP 43685 |
17.89 |
| 2026-07-31 00:00 |
08:55:28.15 |
+35:31:01.1 |
HIP 43685 |
18.85 |
| 2026-07-31 12:00 |
08:55:32.85 |
+35:30:48.1 |
HIP 43685 |
19.82 |
| 2026-08-01 00:00 |
08:55:37.56 |
+35:30:35.3 |
HIP 43685 |
20.79 |
| 2026-08-01 12:00 |
08:55:42.26 |
+35:30:22.7 |
HIP 43685 |
21.77 |
| 2026-08-02 00:00 |
08:55:46.96 |
+35:30:10.2 |
HIP 43685 |
22.74 |
| 2026-08-02 12:00 |
08:55:51.67 |
+35:29:57.8 |
HIP 43685 |
23.71 |
| 2026-08-03 00:00 |
08:55:56.37 |
+35:29:45.6 |
HIP 43685 |
24.69 |
| 2026-08-03 12:00 |
08:56:01.07 |
+35:29:33.6 |
HIP 43685 |
25.66 |
| 2026-08-04 00:00 |
08:56:05.78 |
+35:29:21.7 |
HIP 43685 |
26.63 |
| 2026-08-04 12:00 |
08:56:10.48 |
+35:29:09.9 |
HIP 43685 |
27.61 |
| 2026-08-05 00:00 |
08:56:15.19 |
+35:28:58.3 |
HIP 43685 |
28.58 |
| 2026-08-05 12:00 |
08:56:19.89 |
+35:28:46.9 |
HIP 43949 |
28.88 |
| 2026-08-06 00:00 |
08:56:24.59 |
+35:28:35.6 |
HIP 43949 |
28.41 |
| 2026-08-06 12:00 |
08:56:29.29 |
+35:28:24.4 |
HIP 43949 |
27.97 |
| 2026-08-07 00:00 |
08:56:33.98 |
+35:28:13.5 |
HIP 43949 |
27.55 |
| 2026-08-07 12:00 |
08:56:38.68 |
+35:28:02.6 |
HIP 43949 |
27.17 |
| 2026-08-08 00:00 |
08:56:43.37 |
+35:27:52.0 |
HIP 43949 |
26.83 |
| 2026-08-08 12:00 |
08:56:48.06 |
+35:27:41.5 |
HIP 43949 |
26.51 |
| 2026-08-09 00:00 |
08:56:52.75 |
+35:27:31.2 |
HIP 43949 |
26.23 |
| 2026-08-09 12:00 |
08:56:57.43 |
+35:27:21.0 |
HIP 43949 |
25.99 |
| 2026-08-10 00:00 |
08:57:02.11 |
+35:27:11.0 |
HIP 43949 |
25.79 |
| 2026-08-10 12:00 |
08:57:06.78 |
+35:27:01.2 |
HIP 43949 |
25.62 |
| 2026-08-11 00:00 |
08:57:11.45 |
+35:26:51.5 |
HIP 43949 |
25.49 |
| 2026-08-11 12:00 |
08:57:16.12 |
+35:26:42.0 |
HIP 43949 |
25.40 |
| 2026-08-12 00:00 |
08:57:20.78 |
+35:26:32.7 |
HIP 43949 |
25.35 |
| 2026-08-12 12:00 |
08:57:25.43 |
+35:26:23.5 |
HIP 44064 |
25.15 |
| 2026-08-13 00:00 |
08:57:30.08 |
+35:26:14.5 |
HIP 44064 |
24.82 |
| 2026-08-13 12:00 |
08:57:34.72 |
+35:26:05.7 |
HIP 44064 |
24.52 |
| 2026-08-14 00:00 |
08:57:39.36 |
+35:25:57.1 |
HIP 44064 |
24.26 |
| 2026-08-14 12:00 |
08:57:43.99 |
+35:25:48.6 |
HIP 44064 |
24.03 |
| 2026-08-15 00:00 |
08:57:48.61 |
+35:25:40.3 |
HIP 44064 |
23.83 |
| 2026-08-15 12:00 |
08:57:53.22 |
+35:25:32.2 |
HIP 44064 |
23.66 |
| 2026-08-16 00:00 |
08:57:57.83 |
+35:25:24.3 |
HIP 44064 |
23.53 |
| 2026-08-16 12:00 |
08:58:02.43 |
+35:25:16.5 |
HIP 44064 |
23.44 |
| 2026-08-17 00:00 |
08:58:07.02 |
+35:25:09.0 |
HIP 44064 |
23.38 |
| 2026-08-17 12:00 |
08:58:11.60 |
+35:25:01.6 |
HIP 44064 |
23.35 |
| 2026-08-18 00:00 |
08:58:16.17 |
+35:24:54.4 |
HIP 44064 |
23.37 |
| 2026-08-18 12:00 |
08:58:20.73 |
+35:24:47.3 |
HIP 44064 |
23.41 |
| 2026-08-19 00:00 |
08:58:25.28 |
+35:24:40.5 |
HIP 44128 |
23.43 |