メタデータ
| 項目 |
値 |
| Designation |
C/1967 C2 (Wild) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1967-03-02T12:44:10.069440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1967-03-07.0000000 |
| e |
1.00000000 |
| q (au) |
1.327154 |
| a (au) |
- |
| i (deg) |
99.105076 |
| Ω (om, deg) |
306.845094 |
| ω (w, deg) |
173.262851 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (8.767 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.767 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
21:17:08.11 |
-37:51:39.9 |
HIP 105029 |
8.60 |
| 2026-09-20 12:00 |
21:17:06.81 |
-37:51:38.8 |
HIP 105029 |
8.35 |
| 2026-09-21 00:00 |
21:17:05.53 |
-37:51:37.6 |
HIP 105029 |
8.10 |
| 2026-09-21 12:00 |
21:17:04.25 |
-37:51:36.3 |
HIP 105029 |
7.85 |
| 2026-09-22 00:00 |
21:17:02.98 |
-37:51:34.9 |
HIP 105029 |
7.60 |
| 2026-09-22 12:00 |
21:17:01.72 |
-37:51:33.4 |
HIP 105029 |
7.36 |
| 2026-09-23 00:00 |
21:17:00.47 |
-37:51:31.8 |
HIP 105029 |
7.12 |
| 2026-09-23 12:00 |
21:16:59.23 |
-37:51:30.2 |
HIP 105029 |
6.87 |
| 2026-09-24 00:00 |
21:16:58.00 |
-37:51:28.4 |
HIP 105029 |
6.64 |
| 2026-09-24 12:00 |
21:16:56.78 |
-37:51:26.6 |
HIP 105029 |
6.40 |
| 2026-09-25 00:00 |
21:16:55.57 |
-37:51:24.7 |
HIP 105029 |
6.16 |
| 2026-09-25 12:00 |
21:16:54.37 |
-37:51:22.7 |
HIP 105029 |
5.93 |
| 2026-09-26 00:00 |
21:16:53.19 |
-37:51:20.7 |
HIP 105029 |
5.70 |
| 2026-09-26 12:00 |
21:16:52.01 |
-37:51:18.5 |
HIP 105029 |
5.47 |
| 2026-09-27 00:00 |
21:16:50.84 |
-37:51:16.3 |
HIP 105029 |
5.24 |
| 2026-09-27 12:00 |
21:16:49.69 |
-37:51:14.0 |
HIP 105029 |
5.01 |
| 2026-09-28 00:00 |
21:16:48.54 |
-37:51:11.6 |
HIP 105029 |
4.79 |
| 2026-09-28 12:00 |
21:16:47.41 |
-37:51:09.1 |
HIP 105029 |
4.57 |
| 2026-09-29 00:00 |
21:16:46.29 |
-37:51:06.5 |
HIP 105029 |
4.34 |
| 2026-09-29 12:00 |
21:16:45.18 |
-37:51:03.8 |
HIP 105029 |
4.13 |
| 2026-09-30 00:00 |
21:16:44.08 |
-37:51:01.1 |
HIP 105029 |
3.91 |
| 2026-09-30 12:00 |
21:16:42.99 |
-37:50:58.3 |
HIP 105029 |
3.70 |
| 2026-10-01 00:00 |
21:16:41.91 |
-37:50:55.4 |
HIP 105029 |
3.48 |
| 2026-10-01 12:00 |
21:16:40.85 |
-37:50:52.4 |
HIP 105029 |
3.27 |
| 2026-10-02 00:00 |
21:16:39.79 |
-37:50:49.3 |
HIP 105029 |
3.07 |
| 2026-10-02 12:00 |
21:16:38.75 |
-37:50:46.2 |
HIP 105029 |
2.86 |
| 2026-10-03 00:00 |
21:16:37.72 |
-37:50:43.0 |
HIP 105029 |
2.66 |
| 2026-10-03 12:00 |
21:16:36.70 |
-37:50:39.7 |
HIP 105029 |
2.46 |
| 2026-10-04 00:00 |
21:16:35.70 |
-37:50:36.3 |
HIP 105029 |
2.26 |
| 2026-10-04 12:00 |
21:16:34.70 |
-37:50:32.8 |
HIP 105029 |
2.06 |
| 2026-10-05 00:00 |
21:16:33.72 |
-37:50:29.3 |
HIP 105029 |
1.87 |
| 2026-10-05 12:00 |
21:16:32.75 |
-37:50:25.6 |
HIP 105029 |
1.68 |
| 2026-10-06 00:00 |
21:16:31.79 |
-37:50:21.9 |
HIP 105029 |
1.50 |
| 2026-10-06 12:00 |
21:16:30.84 |
-37:50:18.1 |
HIP 105029 |
1.32 |
| 2026-10-07 00:00 |
21:16:29.91 |
-37:50:14.2 |
HIP 105029 |
1.15 |
| 2026-10-07 12:00 |
21:16:28.99 |
-37:50:10.3 |
HIP 105029 |
0.98 |
| 2026-10-08 00:00 |
21:16:28.08 |
-37:50:06.2 |
HIP 105029 |
0.83 |
| 2026-10-08 12:00 |
21:16:27.19 |
-37:50:02.1 |
HIP 105029 |
0.70 |
| 2026-10-09 00:00 |
21:16:26.30 |
-37:49:57.9 |
HIP 105029 |
0.60 |
| 2026-10-09 12:00 |
21:16:25.43 |
-37:49:53.7 |
HIP 105029 |
0.54 |
| 2026-10-10 00:00 |
21:16:24.58 |
-37:49:49.3 |
HIP 105029 |
0.55 |
| 2026-10-10 12:00 |
21:16:23.73 |
-37:49:44.9 |
HIP 105029 |
0.61 |
| 2026-10-11 00:00 |
21:16:22.90 |
-37:49:40.4 |
HIP 105029 |
0.71 |