C/2012 CH17 (MOSS)
メタデータ
| 項目 |
値 |
| Designation |
C/2012 CH17 (MOSS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-09-28T05:20:29.244480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:03Z |
| Obs used |
627 |
| NEO |
- |
| M1 |
14.000 |
| 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) |
2012-04-06.0000000 |
| e |
0.99998818 |
| q (au) |
1.296093 |
| a (au) |
109657.782316 |
| i (deg) |
27.744192 |
| Ω (om, deg) |
125.984715 |
| ω (w, deg) |
137.993552 |
| M (ma, deg) |
359.999995 |
等級
散乱 + 全体線形
$$
M_a = (12.872 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.872 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.865 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
04:15:19.35 |
-04:31:34.2 |
HIP 19832 |
6.94 |
| 2026-02-03 12:00 |
04:15:18.09 |
-04:31:12.4 |
HIP 19832 |
6.49 |
| 2026-02-04 00:00 |
04:15:16.86 |
-04:30:50.4 |
HIP 19832 |
6.04 |
| 2026-02-04 12:00 |
04:15:15.66 |
-04:30:28.2 |
HIP 19832 |
5.60 |
| 2026-02-05 00:00 |
04:15:14.50 |
-04:30:06.0 |
HIP 19832 |
5.17 |
| 2026-02-05 12:00 |
04:15:13.37 |
-04:29:43.6 |
HIP 19832 |
4.74 |
| 2026-02-06 00:00 |
04:15:12.27 |
-04:29:21.0 |
HIP 19832 |
4.32 |
| 2026-02-06 12:00 |
04:15:11.21 |
-04:28:58.3 |
HIP 19832 |
3.91 |
| 2026-02-07 00:00 |
04:15:10.18 |
-04:28:35.5 |
HIP 19832 |
3.51 |
| 2026-02-07 12:00 |
04:15:09.18 |
-04:28:12.5 |
HIP 19832 |
3.12 |
| 2026-02-08 00:00 |
04:15:08.21 |
-04:27:49.5 |
HIP 19832 |
2.76 |
| 2026-02-08 12:00 |
04:15:07.28 |
-04:27:26.2 |
HIP 19832 |
2.41 |
| 2026-02-09 00:00 |
04:15:06.38 |
-04:27:02.9 |
HIP 19832 |
2.11 |
| 2026-02-09 12:00 |
04:15:05.52 |
-04:26:39.4 |
HIP 19832 |
1.86 |
| 2026-02-10 00:00 |
04:15:04.69 |
-04:26:15.8 |
HIP 19832 |
1.68 |
| 2026-02-10 12:00 |
04:15:03.89 |
-04:25:52.1 |
HIP 19832 |
1.60 |
| 2026-02-11 00:00 |
04:15:03.13 |
-04:25:28.3 |
HIP 19832 |
1.63 |
| 2026-02-11 12:00 |
04:15:02.39 |
-04:25:04.3 |
HIP 19832 |
1.77 |
| 2026-02-12 00:00 |
04:15:01.70 |
-04:24:40.2 |
HIP 19832 |
1.98 |
| 2026-02-12 12:00 |
04:15:01.03 |
-04:24:16.0 |
HIP 19832 |
2.26 |
| 2026-02-13 00:00 |
04:15:00.40 |
-04:23:51.7 |
HIP 19832 |
2.57 |
| 2026-02-13 12:00 |
04:14:59.81 |
-04:23:27.3 |
HIP 19832 |
2.91 |
| 2026-02-14 00:00 |
04:14:59.25 |
-04:23:02.8 |
HIP 19832 |
3.27 |
| 2026-02-14 12:00 |
04:14:58.72 |
-04:22:38.2 |
HIP 19832 |
3.63 |
| 2026-02-15 00:00 |
04:14:58.22 |
-04:22:13.4 |
HIP 19832 |
4.01 |
| 2026-02-15 12:00 |
04:14:57.76 |
-04:21:48.6 |
HIP 19832 |
4.39 |
| 2026-02-16 00:00 |
04:14:57.34 |
-04:21:23.7 |
HIP 19832 |
4.77 |
| 2026-02-16 12:00 |
04:14:56.94 |
-04:20:58.6 |
HIP 19832 |
5.16 |
| 2026-02-17 00:00 |
04:14:56.58 |
-04:20:33.5 |
HIP 19832 |
5.55 |
| 2026-02-17 12:00 |
04:14:56.26 |
-04:20:08.2 |
HIP 19832 |
5.94 |
| 2026-02-18 00:00 |
04:14:55.97 |
-04:19:42.9 |
HIP 19832 |
6.34 |
| 2026-02-18 12:00 |
04:14:55.71 |
-04:19:17.5 |
HIP 19832 |
6.73 |
| 2026-02-19 00:00 |
04:14:55.49 |
-04:18:52.0 |
HIP 19832 |
7.13 |
| 2026-02-19 12:00 |
04:14:55.30 |
-04:18:26.4 |
HIP 19832 |
7.53 |
| 2026-02-20 00:00 |
04:14:55.14 |
-04:18:00.7 |
HIP 19832 |
7.92 |
| 2026-02-20 12:00 |
04:14:55.02 |
-04:17:35.0 |
HIP 19832 |
8.32 |
| 2026-02-21 00:00 |
04:14:54.93 |
-04:17:09.2 |
HIP 19832 |
8.72 |
| 2026-02-21 12:00 |
04:14:54.88 |
-04:16:43.2 |
HIP 19832 |
9.12 |
| 2026-02-22 00:00 |
04:14:54.86 |
-04:16:17.3 |
HIP 19832 |
9.52 |
| 2026-02-22 12:00 |
04:14:54.88 |
-04:15:51.2 |
HIP 19832 |
9.92 |
| 2026-02-23 00:00 |
04:14:54.92 |
-04:15:25.1 |
HIP 19832 |
10.33 |
| 2026-02-23 12:00 |
04:14:55.00 |
-04:14:58.9 |
HIP 19832 |
10.73 |
| 2026-02-24 00:00 |
04:14:55.12 |
-04:14:32.6 |
HIP 19832 |
11.13 |