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) |
| 2026-07-29 00:00 |
12:34:56.27 |
+44:21:09.4 |
HIP 61427 |
6.07 |
| 2026-07-29 12:00 |
12:34:59.07 |
+44:20:08.6 |
HIP 61427 |
6.68 |
| 2026-07-30 00:00 |
12:35:01.92 |
+44:19:07.9 |
HIP 61427 |
7.42 |
| 2026-07-30 12:00 |
12:35:04.80 |
+44:18:07.2 |
HIP 61427 |
8.23 |
| 2026-07-31 00:00 |
12:35:07.73 |
+44:17:06.7 |
HIP 61427 |
9.12 |
| 2026-07-31 12:00 |
12:35:10.70 |
+44:16:06.2 |
HIP 61427 |
10.05 |
| 2026-08-01 00:00 |
12:35:13.71 |
+44:15:05.9 |
HIP 61427 |
11.02 |
| 2026-08-01 12:00 |
12:35:16.75 |
+44:14:05.6 |
HIP 61427 |
12.02 |
| 2026-08-02 00:00 |
12:35:19.84 |
+44:13:05.4 |
HIP 61427 |
13.04 |
| 2026-08-02 12:00 |
12:35:22.97 |
+44:12:05.3 |
HIP 61427 |
14.08 |
| 2026-08-03 00:00 |
12:35:26.13 |
+44:11:05.3 |
HIP 61427 |
15.14 |
| 2026-08-03 12:00 |
12:35:29.34 |
+44:10:05.5 |
HIP 61427 |
16.20 |
| 2026-08-04 00:00 |
12:35:32.58 |
+44:09:05.7 |
HIP 61427 |
17.28 |
| 2026-08-04 12:00 |
12:35:35.87 |
+44:08:06.1 |
HIP 61427 |
18.36 |
| 2026-08-05 00:00 |
12:35:39.19 |
+44:07:06.6 |
HIP 61427 |
19.46 |
| 2026-08-05 12:00 |
12:35:42.55 |
+44:06:07.2 |
HIP 61427 |
20.56 |
| 2026-08-06 00:00 |
12:35:45.94 |
+44:05:07.9 |
HIP 61427 |
21.66 |
| 2026-08-06 12:00 |
12:35:49.38 |
+44:04:08.7 |
HIP 61445 |
21.97 |
| 2026-08-07 00:00 |
12:35:52.85 |
+44:03:09.7 |
HIP 61445 |
21.11 |
| 2026-08-07 12:00 |
12:35:56.36 |
+44:02:10.8 |
HIP 61445 |
20.28 |
| 2026-08-08 00:00 |
12:35:59.91 |
+44:01:12.0 |
HIP 61445 |
19.50 |
| 2026-08-08 12:00 |
12:36:03.49 |
+44:00:13.4 |
HIP 61445 |
18.76 |
| 2026-08-09 00:00 |
12:36:07.11 |
+43:59:14.9 |
HIP 61445 |
18.06 |
| 2026-08-09 12:00 |
12:36:10.77 |
+43:58:16.6 |
HIP 61445 |
17.43 |
| 2026-08-10 00:00 |
12:36:14.46 |
+43:57:18.4 |
HIP 61445 |
16.86 |
| 2026-08-10 12:00 |
12:36:18.19 |
+43:56:20.4 |
HIP 61445 |
16.36 |
| 2026-08-11 00:00 |
12:36:21.95 |
+43:55:22.5 |
HIP 61445 |
15.94 |
| 2026-08-11 12:00 |
12:36:25.75 |
+43:54:24.8 |
HIP 61445 |
15.60 |
| 2026-08-12 00:00 |
12:36:29.59 |
+43:53:27.2 |
HIP 61445 |
15.35 |
| 2026-08-12 12:00 |
12:36:33.46 |
+43:52:29.8 |
HIP 61445 |
15.20 |
| 2026-08-13 00:00 |
12:36:37.36 |
+43:51:32.6 |
HIP 61445 |
15.14 |
| 2026-08-13 12:00 |
12:36:41.30 |
+43:50:35.6 |
HIP 61445 |
15.19 |
| 2026-08-14 00:00 |
12:36:45.27 |
+43:49:38.7 |
HIP 61445 |
15.33 |
| 2026-08-14 12:00 |
12:36:49.28 |
+43:48:42.0 |
HIP 61445 |
15.57 |
| 2026-08-15 00:00 |
12:36:53.32 |
+43:47:45.5 |
HIP 61445 |
15.91 |
| 2026-08-15 12:00 |
12:36:57.39 |
+43:46:49.1 |
HIP 61445 |
16.33 |
| 2026-08-16 00:00 |
12:37:01.49 |
+43:45:53.0 |
HIP 61445 |
16.83 |
| 2026-08-16 12:00 |
12:37:05.63 |
+43:44:57.1 |
HIP 61445 |
17.41 |
| 2026-08-17 00:00 |
12:37:09.80 |
+43:44:01.3 |
HIP 61445 |
18.05 |
| 2026-08-17 12:00 |
12:37:14.00 |
+43:43:05.7 |
HIP 61445 |
18.75 |
| 2026-08-18 00:00 |
12:37:18.23 |
+43:42:10.4 |
HIP 61445 |
19.51 |
| 2026-08-18 12:00 |
12:37:22.49 |
+43:41:15.2 |
HIP 61445 |
20.32 |
| 2026-08-19 00:00 |
12:37:26.78 |
+43:40:20.3 |
HIP 61445 |
21.17 |