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) |
| 2026-03-26 00:00 |
12:46:50.75 |
+46:49:29.9 |
HIP 62374 |
12.04 |
| 2026-03-26 12:00 |
12:46:44.25 |
+46:49:47.2 |
HIP 62374 |
12.55 |
| 2026-03-27 00:00 |
12:46:37.75 |
+46:50:04.0 |
HIP 62374 |
13.12 |
| 2026-03-27 12:00 |
12:46:31.24 |
+46:50:20.3 |
HIP 62374 |
13.76 |
| 2026-03-28 00:00 |
12:46:24.72 |
+46:50:36.1 |
HIP 62374 |
14.46 |
| 2026-03-28 12:00 |
12:46:18.20 |
+46:50:51.4 |
HIP 62374 |
15.20 |
| 2026-03-29 00:00 |
12:46:11.68 |
+46:51:06.2 |
HIP 62374 |
15.99 |
| 2026-03-29 12:00 |
12:46:05.15 |
+46:51:20.4 |
HIP 62374 |
16.81 |
| 2026-03-30 00:00 |
12:45:58.62 |
+46:51:34.1 |
HIP 62374 |
17.65 |
| 2026-03-30 12:00 |
12:45:52.09 |
+46:51:47.3 |
HIP 62374 |
18.53 |
| 2026-03-31 00:00 |
12:45:45.56 |
+46:52:00.0 |
HIP 62374 |
19.42 |
| 2026-03-31 12:00 |
12:45:39.03 |
+46:52:12.2 |
HIP 62374 |
20.33 |
| 2026-04-01 00:00 |
12:45:32.50 |
+46:52:23.8 |
HIP 62374 |
21.26 |
| 2026-04-01 12:00 |
12:45:25.97 |
+46:52:35.0 |
HIP 62374 |
22.20 |
| 2026-04-02 00:00 |
12:45:19.44 |
+46:52:45.6 |
HIP 62374 |
23.16 |
| 2026-04-02 12:00 |
12:45:12.91 |
+46:52:55.6 |
HIP 62374 |
24.12 |
| 2026-04-03 00:00 |
12:45:06.38 |
+46:53:05.2 |
HIP 62374 |
25.09 |
| 2026-04-03 12:00 |
12:44:59.85 |
+46:53:14.2 |
HIP 62374 |
26.07 |
| 2026-04-04 00:00 |
12:44:53.33 |
+46:53:22.7 |
HIP 62374 |
27.05 |
| 2026-04-04 12:00 |
12:44:46.81 |
+46:53:30.7 |
HIP 62374 |
28.04 |
| 2026-04-05 00:00 |
12:44:40.30 |
+46:53:38.1 |
HIP 62374 |
29.04 |
| 2026-04-05 12:00 |
12:44:33.79 |
+46:53:45.0 |
HIP 62374 |
30.03 |
| 2026-04-06 00:00 |
12:44:27.29 |
+46:53:51.4 |
HIP 62374 |
31.03 |
| 2026-04-06 12:00 |
12:44:20.79 |
+46:53:57.2 |
HIP 62374 |
32.04 |
| 2026-04-07 00:00 |
12:44:14.30 |
+46:54:02.6 |
HIP 62374 |
33.04 |
| 2026-04-07 12:00 |
12:44:07.81 |
+46:54:07.3 |
HIP 62374 |
34.05 |
| 2026-04-08 00:00 |
12:44:01.33 |
+46:54:11.6 |
HIP 62374 |
35.05 |
| 2026-04-08 12:00 |
12:43:54.87 |
+46:54:15.3 |
HIP 61855 |
34.37 |
| 2026-04-09 00:00 |
12:43:48.41 |
+46:54:18.5 |
HIP 61855 |
33.30 |
| 2026-04-09 12:00 |
12:43:41.96 |
+46:54:21.1 |
HIP 61855 |
32.23 |
| 2026-04-10 00:00 |
12:43:35.51 |
+46:54:23.3 |
HIP 61855 |
31.16 |
| 2026-04-10 12:00 |
12:43:29.08 |
+46:54:24.8 |
HIP 61855 |
30.10 |
| 2026-04-11 00:00 |
12:43:22.66 |
+46:54:25.9 |
HIP 61855 |
29.04 |
| 2026-04-11 12:00 |
12:43:16.25 |
+46:54:26.4 |
HIP 61855 |
27.98 |
| 2026-04-12 00:00 |
12:43:09.86 |
+46:54:26.4 |
HIP 61855 |
26.92 |
| 2026-04-12 12:00 |
12:43:03.48 |
+46:54:25.8 |
HIP 61855 |
25.87 |
| 2026-04-13 00:00 |
12:42:57.10 |
+46:54:24.7 |
HIP 61855 |
24.81 |
| 2026-04-13 12:00 |
12:42:50.75 |
+46:54:23.1 |
HIP 61855 |
23.77 |
| 2026-04-14 00:00 |
12:42:44.41 |
+46:54:20.9 |
HIP 61855 |
22.72 |
| 2026-04-14 12:00 |
12:42:38.08 |
+46:54:18.2 |
HIP 61855 |
21.68 |
| 2026-04-15 00:00 |
12:42:31.77 |
+46:54:14.9 |
HIP 61855 |
20.64 |
| 2026-04-15 12:00 |
12:42:25.47 |
+46:54:11.2 |
HIP 61855 |
19.61 |
| 2026-04-16 00:00 |
12:42:19.19 |
+46:54:06.8 |
HIP 61855 |
18.58 |