C/2014 C3 (NEOWISE)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 C3 (NEOWISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-01-16T17:29:08.499840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:49Z |
| Obs used |
601 |
| NEO |
- |
| M1 |
15.000 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-03-28.0000000 |
| e |
0.98282842 |
| q (au) |
1.862025 |
| a (au) |
108.436469 |
| i (deg) |
151.784310 |
| Ω (om, deg) |
204.406943 |
| ω (w, deg) |
345.876795 |
| M (ma, deg) |
0.061337 |
等級
散乱 + 全体線形
$$
M_a = (14.486 + 3.306\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.486 |
| n |
3.306 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.033 |
| 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 |
03:37:56.82 |
+38:50:06.7 |
HIP 17019 |
13.77 |
| 2026-02-03 12:00 |
03:37:55.26 |
+38:49:38.9 |
HIP 17019 |
13.79 |
| 2026-02-04 00:00 |
03:37:53.75 |
+38:49:11.1 |
HIP 17019 |
13.83 |
| 2026-02-04 12:00 |
03:37:52.29 |
+38:48:43.4 |
HIP 17019 |
13.88 |
| 2026-02-05 00:00 |
03:37:50.87 |
+38:48:15.9 |
HIP 17019 |
13.94 |
| 2026-02-05 12:00 |
03:37:49.51 |
+38:47:48.4 |
HIP 17019 |
14.02 |
| 2026-02-06 00:00 |
03:37:48.20 |
+38:47:21.1 |
HIP 17019 |
14.10 |
| 2026-02-06 12:00 |
03:37:46.93 |
+38:46:53.8 |
HIP 17019 |
14.20 |
| 2026-02-07 00:00 |
03:37:45.71 |
+38:46:26.7 |
HIP 17019 |
14.30 |
| 2026-02-07 12:00 |
03:37:44.55 |
+38:45:59.7 |
HIP 17019 |
14.42 |
| 2026-02-08 00:00 |
03:37:43.43 |
+38:45:32.8 |
HIP 17019 |
14.54 |
| 2026-02-08 12:00 |
03:37:42.36 |
+38:45:06.1 |
HIP 17019 |
14.66 |
| 2026-02-09 00:00 |
03:37:41.34 |
+38:44:39.4 |
HIP 17019 |
14.80 |
| 2026-02-09 12:00 |
03:37:40.37 |
+38:44:12.9 |
HIP 17019 |
14.94 |
| 2026-02-10 00:00 |
03:37:39.45 |
+38:43:46.5 |
HIP 17019 |
15.08 |
| 2026-02-10 12:00 |
03:37:38.58 |
+38:43:20.2 |
HIP 17019 |
15.23 |
| 2026-02-11 00:00 |
03:37:37.76 |
+38:42:54.1 |
HIP 17019 |
15.38 |
| 2026-02-11 12:00 |
03:37:36.98 |
+38:42:28.1 |
HIP 17019 |
15.53 |
| 2026-02-12 00:00 |
03:37:36.26 |
+38:42:02.2 |
HIP 17019 |
15.69 |
| 2026-02-12 12:00 |
03:37:35.58 |
+38:41:36.4 |
HIP 17019 |
15.85 |
| 2026-02-13 00:00 |
03:37:34.96 |
+38:41:10.8 |
HIP 17019 |
16.01 |
| 2026-02-13 12:00 |
03:37:34.38 |
+38:40:45.3 |
HIP 17019 |
16.17 |
| 2026-02-14 00:00 |
03:37:33.85 |
+38:40:20.0 |
HIP 17019 |
16.33 |
| 2026-02-14 12:00 |
03:37:33.37 |
+38:39:54.8 |
HIP 17019 |
16.49 |
| 2026-02-15 00:00 |
03:37:32.94 |
+38:39:29.7 |
HIP 17019 |
16.65 |
| 2026-02-15 12:00 |
03:37:32.56 |
+38:39:04.8 |
HIP 17019 |
16.81 |
| 2026-02-16 00:00 |
03:37:32.23 |
+38:38:40.1 |
HIP 17019 |
16.97 |
| 2026-02-16 12:00 |
03:37:31.94 |
+38:38:15.4 |
HIP 17019 |
17.13 |
| 2026-02-17 00:00 |
03:37:31.71 |
+38:37:51.0 |
HIP 17019 |
17.28 |
| 2026-02-17 12:00 |
03:37:31.52 |
+38:37:26.6 |
HIP 17019 |
17.44 |
| 2026-02-18 00:00 |
03:37:31.38 |
+38:37:02.5 |
HIP 17019 |
17.59 |
| 2026-02-18 12:00 |
03:37:31.29 |
+38:36:38.5 |
HIP 17019 |
17.74 |
| 2026-02-19 00:00 |
03:37:31.25 |
+38:36:14.6 |
HIP 17019 |
17.89 |
| 2026-02-19 12:00 |
03:37:31.26 |
+38:35:50.9 |
HIP 17019 |
18.04 |
| 2026-02-20 00:00 |
03:37:31.31 |
+38:35:27.3 |
HIP 17019 |
18.19 |
| 2026-02-20 12:00 |
03:37:31.41 |
+38:35:04.0 |
HIP 17019 |
18.33 |
| 2026-02-21 00:00 |
03:37:31.56 |
+38:34:40.7 |
HIP 17019 |
18.47 |
| 2026-02-21 12:00 |
03:37:31.76 |
+38:34:17.7 |
HIP 17019 |
18.61 |
| 2026-02-22 00:00 |
03:37:32.01 |
+38:33:54.8 |
HIP 17019 |
18.74 |
| 2026-02-22 12:00 |
03:37:32.30 |
+38:33:32.0 |
HIP 17019 |
18.87 |
| 2026-02-23 00:00 |
03:37:32.64 |
+38:33:09.4 |
HIP 17019 |
19.00 |
| 2026-02-23 12:00 |
03:37:33.03 |
+38:32:47.0 |
HIP 17019 |
19.13 |
| 2026-02-24 00:00 |
03:37:33.46 |
+38:32:24.8 |
HIP 17019 |
19.26 |