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) |
| 2026-09-20 00:00 |
12:53:12.67 |
-19:26:52.6 |
HIP 62900 |
25.85 |
| 2026-09-20 12:00 |
12:53:16.29 |
-19:27:09.9 |
HIP 62900 |
25.44 |
| 2026-09-21 00:00 |
12:53:19.93 |
-19:27:27.4 |
HIP 62900 |
25.06 |
| 2026-09-21 12:00 |
12:53:23.57 |
-19:27:45.1 |
HIP 62900 |
24.71 |
| 2026-09-22 00:00 |
12:53:27.22 |
-19:28:02.9 |
HIP 62900 |
24.38 |
| 2026-09-22 12:00 |
12:53:30.88 |
-19:28:20.9 |
HIP 62900 |
24.08 |
| 2026-09-23 00:00 |
12:53:34.55 |
-19:28:39.1 |
HIP 62900 |
23.80 |
| 2026-09-23 12:00 |
12:53:38.23 |
-19:28:57.4 |
HIP 62900 |
23.56 |
| 2026-09-24 00:00 |
12:53:41.91 |
-19:29:15.9 |
HIP 62900 |
23.35 |
| 2026-09-24 12:00 |
12:53:45.60 |
-19:29:34.6 |
HIP 62900 |
23.17 |
| 2026-09-25 00:00 |
12:53:49.30 |
-19:29:53.4 |
HIP 62900 |
23.02 |
| 2026-09-25 12:00 |
12:53:53.01 |
-19:30:12.4 |
HIP 62900 |
22.91 |
| 2026-09-26 00:00 |
12:53:56.72 |
-19:30:31.5 |
HIP 62900 |
22.83 |
| 2026-09-26 12:00 |
12:54:00.44 |
-19:30:50.8 |
HIP 62900 |
22.78 |
| 2026-09-27 00:00 |
12:54:04.16 |
-19:31:10.3 |
HIP 62900 |
22.78 |
| 2026-09-27 12:00 |
12:54:07.90 |
-19:31:29.9 |
HIP 62900 |
22.81 |
| 2026-09-28 00:00 |
12:54:11.63 |
-19:31:49.7 |
HIP 62900 |
22.88 |
| 2026-09-28 12:00 |
12:54:15.37 |
-19:32:09.6 |
HIP 62900 |
22.98 |
| 2026-09-29 00:00 |
12:54:19.12 |
-19:32:29.6 |
HIP 62900 |
23.12 |
| 2026-09-29 12:00 |
12:54:22.87 |
-19:32:49.9 |
HIP 62900 |
23.30 |
| 2026-09-30 00:00 |
12:54:26.63 |
-19:33:10.2 |
HIP 62900 |
23.51 |
| 2026-09-30 12:00 |
12:54:30.39 |
-19:33:30.7 |
HIP 62900 |
23.75 |
| 2026-10-01 00:00 |
12:54:34.16 |
-19:33:51.4 |
HIP 62900 |
24.03 |
| 2026-10-01 12:00 |
12:54:37.93 |
-19:34:12.2 |
HIP 63142 |
23.69 |
| 2026-10-02 00:00 |
12:54:41.70 |
-19:34:33.1 |
HIP 63142 |
22.76 |
| 2026-10-02 12:00 |
12:54:45.48 |
-19:34:54.2 |
HIP 63142 |
21.83 |
| 2026-10-03 00:00 |
12:54:49.26 |
-19:35:15.5 |
HIP 63142 |
20.90 |
| 2026-10-03 12:00 |
12:54:53.04 |
-19:35:36.8 |
HIP 63142 |
19.97 |
| 2026-10-04 00:00 |
12:54:56.82 |
-19:35:58.3 |
HIP 63142 |
19.04 |
| 2026-10-04 12:00 |
12:55:00.61 |
-19:36:20.0 |
HIP 63142 |
18.12 |
| 2026-10-05 00:00 |
12:55:04.40 |
-19:36:41.8 |
HIP 63142 |
17.20 |
| 2026-10-05 12:00 |
12:55:08.19 |
-19:37:03.7 |
HIP 63142 |
16.29 |
| 2026-10-06 00:00 |
12:55:11.99 |
-19:37:25.7 |
HIP 63142 |
15.38 |
| 2026-10-06 12:00 |
12:55:15.78 |
-19:37:47.9 |
HIP 63142 |
14.48 |
| 2026-10-07 00:00 |
12:55:19.58 |
-19:38:10.2 |
HIP 63142 |
13.59 |
| 2026-10-07 12:00 |
12:55:23.37 |
-19:38:32.6 |
HIP 63142 |
12.71 |
| 2026-10-08 00:00 |
12:55:27.17 |
-19:38:55.2 |
HIP 63142 |
11.84 |
| 2026-10-08 12:00 |
12:55:30.96 |
-19:39:17.8 |
HIP 63142 |
11.00 |
| 2026-10-09 00:00 |
12:55:34.76 |
-19:39:40.6 |
HIP 63142 |
10.17 |
| 2026-10-09 12:00 |
12:55:38.56 |
-19:40:03.6 |
HIP 63142 |
9.37 |
| 2026-10-10 00:00 |
12:55:42.35 |
-19:40:26.6 |
HIP 63142 |
8.61 |
| 2026-10-10 12:00 |
12:55:46.14 |
-19:40:49.7 |
HIP 63142 |
7.90 |
| 2026-10-11 00:00 |
12:55:49.94 |
-19:41:13.0 |
HIP 63142 |
7.25 |