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) |
| 2026-05-12 00:00 |
12:37:28.03 |
+46:38:31.3 |
HIP 61574 |
4.97 |
| 2026-05-12 12:00 |
12:37:23.32 |
+46:38:00.4 |
HIP 61574 |
4.59 |
| 2026-05-13 00:00 |
12:37:18.64 |
+46:37:29.1 |
HIP 61574 |
4.40 |
| 2026-05-13 12:00 |
12:37:14.01 |
+46:36:57.3 |
HIP 61574 |
4.42 |
| 2026-05-14 00:00 |
12:37:09.42 |
+46:36:25.1 |
HIP 61574 |
4.65 |
| 2026-05-14 12:00 |
12:37:04.87 |
+46:35:52.4 |
HIP 61574 |
5.06 |
| 2026-05-15 00:00 |
12:37:00.36 |
+46:35:19.3 |
HIP 61574 |
5.61 |
| 2026-05-15 12:00 |
12:36:55.89 |
+46:34:45.8 |
HIP 61574 |
6.27 |
| 2026-05-16 00:00 |
12:36:51.47 |
+46:34:11.8 |
HIP 61574 |
6.99 |
| 2026-05-16 12:00 |
12:36:47.09 |
+46:33:37.4 |
HIP 61574 |
7.77 |
| 2026-05-17 00:00 |
12:36:42.75 |
+46:33:02.6 |
HIP 61574 |
8.59 |
| 2026-05-17 12:00 |
12:36:38.45 |
+46:32:27.3 |
HIP 61574 |
9.43 |
| 2026-05-18 00:00 |
12:36:34.20 |
+46:31:51.7 |
HIP 61574 |
10.30 |
| 2026-05-18 12:00 |
12:36:30.00 |
+46:31:15.6 |
HIP 61574 |
11.17 |
| 2026-05-19 00:00 |
12:36:25.83 |
+46:30:39.0 |
HIP 61574 |
12.06 |
| 2026-05-19 12:00 |
12:36:21.72 |
+46:30:02.1 |
HIP 61574 |
12.96 |
| 2026-05-20 00:00 |
12:36:17.64 |
+46:29:24.8 |
HIP 61574 |
13.87 |
| 2026-05-20 12:00 |
12:36:13.61 |
+46:28:47.0 |
HIP 61574 |
14.78 |
| 2026-05-21 00:00 |
12:36:09.63 |
+46:28:08.8 |
HIP 61574 |
15.69 |
| 2026-05-21 12:00 |
12:36:05.70 |
+46:27:30.3 |
HIP 61574 |
16.61 |
| 2026-05-22 00:00 |
12:36:01.80 |
+46:26:51.3 |
HIP 61574 |
17.53 |
| 2026-05-22 12:00 |
12:35:57.96 |
+46:26:12.0 |
HIP 61528 |
18.09 |
| 2026-05-23 00:00 |
12:35:54.16 |
+46:25:32.2 |
HIP 61528 |
17.60 |
| 2026-05-23 12:00 |
12:35:50.41 |
+46:24:52.1 |
HIP 61528 |
17.15 |
| 2026-05-24 00:00 |
12:35:46.70 |
+46:24:11.6 |
HIP 61528 |
16.72 |
| 2026-05-24 12:00 |
12:35:43.04 |
+46:23:30.7 |
HIP 61528 |
16.33 |
| 2026-05-25 00:00 |
12:35:39.43 |
+46:22:49.4 |
HIP 61528 |
15.98 |
| 2026-05-25 12:00 |
12:35:35.87 |
+46:22:07.8 |
HIP 61528 |
15.66 |
| 2026-05-26 00:00 |
12:35:32.35 |
+46:21:25.8 |
HIP 61528 |
15.38 |
| 2026-05-26 12:00 |
12:35:28.88 |
+46:20:43.4 |
HIP 61528 |
15.15 |
| 2026-05-27 00:00 |
12:35:25.46 |
+46:20:00.6 |
HIP 61528 |
14.95 |
| 2026-05-27 12:00 |
12:35:22.08 |
+46:19:17.5 |
HIP 61528 |
14.81 |
| 2026-05-28 00:00 |
12:35:18.76 |
+46:18:34.0 |
HIP 61528 |
14.71 |
| 2026-05-28 12:00 |
12:35:15.48 |
+46:17:50.2 |
HIP 61528 |
14.66 |
| 2026-05-29 00:00 |
12:35:12.25 |
+46:17:06.0 |
HIP 61528 |
14.65 |
| 2026-05-29 12:00 |
12:35:09.07 |
+46:16:21.5 |
HIP 61528 |
14.70 |
| 2026-05-30 00:00 |
12:35:05.93 |
+46:15:36.7 |
HIP 61528 |
14.79 |
| 2026-05-30 12:00 |
12:35:02.85 |
+46:14:51.5 |
HIP 61528 |
14.93 |
| 2026-05-31 00:00 |
12:34:59.82 |
+46:14:05.9 |
HIP 61528 |
15.12 |
| 2026-05-31 12:00 |
12:34:56.83 |
+46:13:20.0 |
HIP 61528 |
15.34 |
| 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 |