C/2014 M3 (Catalina)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 M3 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-06-21T22:25:14.257920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:56Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
12.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-07-27.0000000 |
| e |
0.98235311 |
| q (au) |
2.434267 |
| a (au) |
137.943094 |
| i (deg) |
164.909650 |
| Ω (om, deg) |
80.367465 |
| ω (w, deg) |
93.740309 |
| M (ma, deg) |
0.021332 |
等級
散乱 + 全体線形
$$
M_a = (13.691 + 4.806\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.691 |
| n |
4.806 |
| gf |
1.000 |
| gb |
-0.540 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
13:06:25.15 |
-21:20:15.4 |
HIP 63985 |
10.03 |
| 2026-02-03 12:00 |
13:06:22.70 |
-21:20:18.0 |
HIP 63985 |
10.31 |
| 2026-02-04 00:00 |
13:06:20.21 |
-21:20:20.4 |
HIP 63985 |
10.61 |
| 2026-02-04 12:00 |
13:06:17.68 |
-21:20:22.5 |
HIP 63985 |
10.93 |
| 2026-02-05 00:00 |
13:06:15.12 |
-21:20:24.3 |
HIP 63985 |
11.27 |
| 2026-02-05 12:00 |
13:06:12.52 |
-21:20:25.9 |
HIP 63985 |
11.64 |
| 2026-02-06 00:00 |
13:06:09.88 |
-21:20:27.1 |
HIP 63985 |
12.03 |
| 2026-02-06 12:00 |
13:06:07.21 |
-21:20:28.2 |
HIP 63985 |
12.44 |
| 2026-02-07 00:00 |
13:06:04.50 |
-21:20:28.9 |
HIP 63985 |
12.86 |
| 2026-02-07 12:00 |
13:06:01.75 |
-21:20:29.3 |
HIP 63985 |
13.31 |
| 2026-02-08 00:00 |
13:05:58.97 |
-21:20:29.5 |
HIP 63985 |
13.78 |
| 2026-02-08 12:00 |
13:05:56.15 |
-21:20:29.4 |
HIP 63985 |
14.26 |
| 2026-02-09 00:00 |
13:05:53.29 |
-21:20:29.1 |
HIP 63985 |
14.76 |
| 2026-02-09 12:00 |
13:05:50.40 |
-21:20:28.4 |
HIP 63985 |
15.27 |
| 2026-02-10 00:00 |
13:05:47.47 |
-21:20:27.5 |
HIP 63985 |
15.81 |
| 2026-02-10 12:00 |
13:05:44.51 |
-21:20:26.3 |
HIP 63827 |
16.18 |
| 2026-02-11 00:00 |
13:05:41.51 |
-21:20:24.9 |
HIP 63827 |
15.68 |
| 2026-02-11 12:00 |
13:05:38.48 |
-21:20:23.1 |
HIP 63827 |
15.20 |
| 2026-02-12 00:00 |
13:05:35.41 |
-21:20:21.1 |
HIP 63827 |
14.73 |
| 2026-02-12 12:00 |
13:05:32.31 |
-21:20:18.8 |
HIP 63827 |
14.28 |
| 2026-02-13 00:00 |
13:05:29.18 |
-21:20:16.2 |
HIP 63827 |
13.85 |
| 2026-02-13 12:00 |
13:05:26.01 |
-21:20:13.3 |
HIP 63827 |
13.45 |
| 2026-02-14 00:00 |
13:05:22.80 |
-21:20:10.2 |
HIP 63827 |
13.07 |
| 2026-02-14 12:00 |
13:05:19.56 |
-21:20:06.7 |
HIP 63827 |
12.73 |
| 2026-02-15 00:00 |
13:05:16.29 |
-21:20:03.0 |
HIP 63827 |
12.43 |
| 2026-02-15 12:00 |
13:05:12.98 |
-21:19:59.0 |
HIP 63827 |
12.17 |
| 2026-02-16 00:00 |
13:05:09.65 |
-21:19:54.8 |
HIP 63827 |
11.96 |
| 2026-02-16 12:00 |
13:05:06.27 |
-21:19:50.2 |
HIP 63827 |
11.79 |
| 2026-02-17 00:00 |
13:05:02.87 |
-21:19:45.4 |
HIP 63827 |
11.68 |
| 2026-02-17 12:00 |
13:04:59.43 |
-21:19:40.3 |
HIP 63827 |
11.63 |
| 2026-02-18 00:00 |
13:04:55.96 |
-21:19:34.9 |
HIP 63827 |
11.63 |
| 2026-02-18 12:00 |
13:04:52.46 |
-21:19:29.3 |
HIP 63827 |
11.70 |
| 2026-02-19 00:00 |
13:04:48.93 |
-21:19:23.3 |
HIP 63827 |
11.83 |
| 2026-02-19 12:00 |
13:04:45.37 |
-21:19:17.1 |
HIP 63827 |
12.02 |
| 2026-02-20 00:00 |
13:04:41.77 |
-21:19:10.6 |
HIP 63827 |
12.27 |
| 2026-02-20 12:00 |
13:04:38.15 |
-21:19:03.8 |
HIP 63827 |
12.58 |
| 2026-02-21 00:00 |
13:04:34.49 |
-21:18:56.8 |
HIP 63827 |
12.94 |
| 2026-02-21 12:00 |
13:04:30.81 |
-21:18:49.4 |
HIP 63827 |
13.36 |
| 2026-02-22 00:00 |
13:04:27.09 |
-21:18:41.8 |
HIP 63827 |
13.83 |
| 2026-02-22 12:00 |
13:04:23.34 |
-21:18:33.9 |
HIP 63827 |
14.34 |
| 2026-02-23 00:00 |
13:04:19.57 |
-21:18:25.8 |
HIP 63827 |
14.89 |
| 2026-02-23 12:00 |
13:04:15.76 |
-21:18:17.3 |
HIP 63827 |
15.48 |
| 2026-02-24 00:00 |
13:04:11.93 |
-21:18:08.6 |
HIP 63827 |
16.11 |