C/2014 N3 (NEOWISE)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 N3 (NEOWISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-03-13T04:47:40.300800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:57Z |
| Obs used |
1594 |
| NEO |
- |
| M1 |
5.000 |
| K1 |
12.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-08-05.0000000 |
| e |
0.99933102 |
| q (au) |
3.882231 |
| a (au) |
5803.176986 |
| i (deg) |
61.638248 |
| Ω (om, deg) |
19.927065 |
| ω (w, deg) |
353.565396 |
| M (ma, deg) |
0.000323 |
等級
散乱 + 全体線形
$$
M_a = (8.073 + 2.710\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.073 |
| n |
2.710 |
| gf |
1.000 |
| gb |
-0.503 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
12:55:42.10 |
+45:44:09.8 |
HIP 63190 |
13.08 |
| 2026-02-03 12:00 |
12:55:38.96 |
+45:45:02.0 |
HIP 63190 |
14.02 |
| 2026-02-04 00:00 |
12:55:35.76 |
+45:45:54.1 |
HIP 63190 |
14.98 |
| 2026-02-04 12:00 |
12:55:32.51 |
+45:46:46.1 |
HIP 63190 |
15.96 |
| 2026-02-05 00:00 |
12:55:29.21 |
+45:47:38.0 |
HIP 63190 |
16.94 |
| 2026-02-05 12:00 |
12:55:25.86 |
+45:48:29.8 |
HIP 63190 |
17.94 |
| 2026-02-06 00:00 |
12:55:22.45 |
+45:49:21.4 |
HIP 63190 |
18.95 |
| 2026-02-06 12:00 |
12:55:19.00 |
+45:50:12.9 |
HIP 63190 |
19.97 |
| 2026-02-07 00:00 |
12:55:15.49 |
+45:51:04.3 |
HIP 63190 |
21.00 |
| 2026-02-07 12:00 |
12:55:11.93 |
+45:51:55.5 |
HIP 63190 |
22.03 |
| 2026-02-08 00:00 |
12:55:08.32 |
+45:52:46.5 |
HIP 62855 |
22.22 |
| 2026-02-08 12:00 |
12:55:04.66 |
+45:53:37.4 |
HIP 62855 |
21.68 |
| 2026-02-09 00:00 |
12:55:00.95 |
+45:54:28.1 |
HIP 62855 |
21.18 |
| 2026-02-09 12:00 |
12:54:57.19 |
+45:55:18.7 |
HIP 62855 |
20.71 |
| 2026-02-10 00:00 |
12:54:53.38 |
+45:56:09.0 |
HIP 62855 |
20.28 |
| 2026-02-10 12:00 |
12:54:49.52 |
+45:56:59.2 |
HIP 62855 |
19.89 |
| 2026-02-11 00:00 |
12:54:45.61 |
+45:57:49.2 |
HIP 62855 |
19.54 |
| 2026-02-11 12:00 |
12:54:41.65 |
+45:58:39.1 |
HIP 62855 |
19.23 |
| 2026-02-12 00:00 |
12:54:37.65 |
+45:59:28.7 |
HIP 62855 |
18.98 |
| 2026-02-12 12:00 |
12:54:33.59 |
+46:00:18.1 |
HIP 62855 |
18.77 |
| 2026-02-13 00:00 |
12:54:29.49 |
+46:01:07.3 |
HIP 62855 |
18.62 |
| 2026-02-13 12:00 |
12:54:25.34 |
+46:01:56.3 |
HIP 62855 |
18.51 |
| 2026-02-14 00:00 |
12:54:21.14 |
+46:02:45.1 |
HIP 62855 |
18.47 |
| 2026-02-14 12:00 |
12:54:16.90 |
+46:03:33.7 |
HIP 62855 |
18.48 |
| 2026-02-15 00:00 |
12:54:12.60 |
+46:04:22.0 |
HIP 62855 |
18.55 |
| 2026-02-15 12:00 |
12:54:08.26 |
+46:05:10.1 |
HIP 62997 |
18.19 |
| 2026-02-16 00:00 |
12:54:03.88 |
+46:05:58.0 |
HIP 62997 |
17.61 |
| 2026-02-16 12:00 |
12:53:59.45 |
+46:06:45.6 |
HIP 62997 |
17.08 |
| 2026-02-17 00:00 |
12:53:54.97 |
+46:07:33.0 |
HIP 62997 |
16.62 |
| 2026-02-17 12:00 |
12:53:50.45 |
+46:08:20.1 |
HIP 62997 |
16.23 |
| 2026-02-18 00:00 |
12:53:45.89 |
+46:09:07.0 |
HIP 62997 |
15.91 |
| 2026-02-18 12:00 |
12:53:41.28 |
+46:09:53.6 |
HIP 62997 |
15.68 |
| 2026-02-19 00:00 |
12:53:36.63 |
+46:10:39.9 |
HIP 62997 |
15.52 |
| 2026-02-19 12:00 |
12:53:31.93 |
+46:11:26.0 |
HIP 62997 |
15.46 |
| 2026-02-20 00:00 |
12:53:27.20 |
+46:12:11.7 |
HIP 62997 |
15.48 |
| 2026-02-20 12:00 |
12:53:22.41 |
+46:12:57.2 |
HIP 62997 |
15.59 |
| 2026-02-21 00:00 |
12:53:17.59 |
+46:13:42.4 |
HIP 62997 |
15.79 |
| 2026-02-21 12:00 |
12:53:12.73 |
+46:14:27.3 |
HIP 62997 |
16.07 |
| 2026-02-22 00:00 |
12:53:07.82 |
+46:15:12.0 |
HIP 62997 |
16.44 |
| 2026-02-22 12:00 |
12:53:02.88 |
+46:15:56.3 |
HIP 62997 |
16.88 |
| 2026-02-23 00:00 |
12:52:57.89 |
+46:16:40.3 |
HIP 62997 |
17.39 |
| 2026-02-23 12:00 |
12:52:52.87 |
+46:17:24.0 |
HIP 62997 |
17.96 |
| 2026-02-24 00:00 |
12:52:47.80 |
+46:18:07.3 |
HIP 62997 |
18.60 |