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 |
0.998 |
| gb |
-0.998 |
| 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) |
| 2026-06-01 00:00 |
12:34:53.89 |
+46:12:33.8 |
HIP 61528 |
15.61 |
| 2026-06-01 12:00 |
12:34:51.01 |
+46:11:47.3 |
HIP 61528 |
15.92 |
| 2026-06-02 00:00 |
12:34:48.17 |
+46:11:00.4 |
HIP 61528 |
16.27 |
| 2026-06-02 12:00 |
12:34:45.38 |
+46:10:13.2 |
HIP 61528 |
16.65 |
| 2026-06-03 00:00 |
12:34:42.64 |
+46:09:25.7 |
HIP 61528 |
17.07 |
| 2026-06-03 12:00 |
12:34:39.95 |
+46:08:37.9 |
HIP 61528 |
17.52 |
| 2026-06-04 00:00 |
12:34:37.32 |
+46:07:49.7 |
HIP 61528 |
17.99 |
| 2026-06-04 12:00 |
12:34:34.73 |
+46:07:01.3 |
HIP 61528 |
18.49 |
| 2026-06-05 00:00 |
12:34:32.19 |
+46:06:12.5 |
HIP 61528 |
19.01 |
| 2026-06-05 12:00 |
12:34:29.70 |
+46:05:23.5 |
HIP 61528 |
19.56 |
| 2026-06-06 00:00 |
12:34:27.26 |
+46:04:34.1 |
HIP 61528 |
20.13 |
| 2026-06-06 12:00 |
12:34:24.88 |
+46:03:44.5 |
HIP 61528 |
20.71 |
| 2026-06-07 00:00 |
12:34:22.54 |
+46:02:54.5 |
HIP 61528 |
21.31 |
| 2026-06-07 12:00 |
12:34:20.25 |
+46:02:04.3 |
HIP 61528 |
21.93 |
| 2026-06-08 00:00 |
12:34:18.02 |
+46:01:13.7 |
HIP 61487 |
21.91 |
| 2026-06-08 12:00 |
12:34:15.84 |
+46:00:22.9 |
HIP 61487 |
21.67 |
| 2026-06-09 00:00 |
12:34:13.70 |
+45:59:31.8 |
HIP 61487 |
21.44 |
| 2026-06-09 12:00 |
12:34:11.62 |
+45:58:40.4 |
HIP 61487 |
21.25 |
| 2026-06-10 00:00 |
12:34:09.59 |
+45:57:48.8 |
HIP 61487 |
21.09 |
| 2026-06-10 12:00 |
12:34:07.61 |
+45:56:56.9 |
HIP 61487 |
20.95 |
| 2026-06-11 00:00 |
12:34:05.69 |
+45:56:04.7 |
HIP 61487 |
20.85 |
| 2026-06-11 12:00 |
12:34:03.81 |
+45:55:12.2 |
HIP 61487 |
20.78 |
| 2026-06-12 00:00 |
12:34:01.99 |
+45:54:19.5 |
HIP 61487 |
20.74 |
| 2026-06-12 12:00 |
12:34:00.22 |
+45:53:26.6 |
HIP 61487 |
20.74 |
| 2026-06-13 00:00 |
12:33:58.50 |
+45:52:33.3 |
HIP 61487 |
20.76 |
| 2026-06-13 12:00 |
12:33:56.83 |
+45:51:39.9 |
HIP 61487 |
20.82 |
| 2026-06-14 00:00 |
12:33:55.21 |
+45:50:46.2 |
HIP 61487 |
20.91 |
| 2026-06-14 12:00 |
12:33:53.65 |
+45:49:52.2 |
HIP 61487 |
21.03 |
| 2026-06-15 00:00 |
12:33:52.14 |
+45:48:58.0 |
HIP 61487 |
21.19 |
| 2026-06-15 12:00 |
12:33:50.68 |
+45:48:03.6 |
HIP 61487 |
21.37 |
| 2026-06-16 00:00 |
12:33:49.27 |
+45:47:08.9 |
HIP 61487 |
21.59 |
| 2026-06-16 12:00 |
12:33:47.92 |
+45:46:14.0 |
HIP 61487 |
21.84 |
| 2026-06-17 00:00 |
12:33:46.61 |
+45:45:18.9 |
HIP 61487 |
22.11 |
| 2026-06-17 12:00 |
12:33:45.36 |
+45:44:23.6 |
HIP 61186 |
21.56 |
| 2026-06-18 00:00 |
12:33:44.16 |
+45:43:28.0 |
HIP 61186 |
20.79 |
| 2026-06-18 12:00 |
12:33:43.02 |
+45:42:32.3 |
HIP 61186 |
20.04 |
| 2026-06-19 00:00 |
12:33:41.92 |
+45:41:36.3 |
HIP 61186 |
19.31 |
| 2026-06-19 12:00 |
12:33:40.88 |
+45:40:40.1 |
HIP 61186 |
18.61 |
| 2026-06-20 00:00 |
12:33:39.89 |
+45:39:43.8 |
HIP 61186 |
17.94 |
| 2026-06-20 12:00 |
12:33:38.96 |
+45:38:47.2 |
HIP 61186 |
17.30 |
| 2026-06-21 00:00 |
12:33:38.07 |
+45:37:50.5 |
HIP 61186 |
16.69 |
| 2026-06-21 12:00 |
12:33:37.24 |
+45:36:53.5 |
HIP 61186 |
16.13 |
| 2026-06-22 00:00 |
12:33:36.46 |
+45:35:56.4 |
HIP 61186 |
15.61 |