メタデータ
| 項目 |
値 |
| Designation |
C/1937 D1 (Wilk) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1937-02-21T12:38:22.404480Z |
| Orbit solution date (soln_date, UTC) |
2024-02-20T20:16:49Z |
| Obs used |
17 |
| NEO |
Yes |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1937-03-17.0000000 |
| e |
0.98064326 |
| q (au) |
0.618890 |
| a (au) |
31.972825 |
| i (deg) |
26.014023 |
| Ω (om, deg) |
58.270037 |
| ω (w, deg) |
31.457951 |
| M (ma, deg) |
0.127970 |
等級
散乱 + 全体線形
$$
M_a = (10.016 + 4.637\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.016 |
| n |
4.637 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.940 |
| 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) |
| 2026-06-01 00:00 |
17:46:47.92 |
-36:48:06.4 |
HIP 86951 |
12.07 |
| 2026-06-01 12:00 |
17:46:45.73 |
-36:48:07.9 |
HIP 86951 |
11.78 |
| 2026-06-02 00:00 |
17:46:43.52 |
-36:48:09.3 |
HIP 86951 |
11.50 |
| 2026-06-02 12:00 |
17:46:41.31 |
-36:48:10.7 |
HIP 86951 |
11.23 |
| 2026-06-03 00:00 |
17:46:39.10 |
-36:48:12.1 |
HIP 86951 |
10.97 |
| 2026-06-03 12:00 |
17:46:36.88 |
-36:48:13.4 |
HIP 86951 |
10.72 |
| 2026-06-04 00:00 |
17:46:34.65 |
-36:48:14.6 |
HIP 86951 |
10.48 |
| 2026-06-04 12:00 |
17:46:32.42 |
-36:48:15.8 |
HIP 86951 |
10.26 |
| 2026-06-05 00:00 |
17:46:30.19 |
-36:48:16.9 |
HIP 86951 |
10.05 |
| 2026-06-05 12:00 |
17:46:27.95 |
-36:48:17.9 |
HIP 86951 |
9.85 |
| 2026-06-06 00:00 |
17:46:25.71 |
-36:48:18.9 |
HIP 86951 |
9.67 |
| 2026-06-06 12:00 |
17:46:23.46 |
-36:48:19.9 |
HIP 86951 |
9.50 |
| 2026-06-07 00:00 |
17:46:21.21 |
-36:48:20.8 |
HIP 86951 |
9.35 |
| 2026-06-07 12:00 |
17:46:18.95 |
-36:48:21.6 |
HIP 86951 |
9.22 |
| 2026-06-08 00:00 |
17:46:16.69 |
-36:48:22.3 |
HIP 86951 |
9.11 |
| 2026-06-08 12:00 |
17:46:14.43 |
-36:48:23.1 |
HIP 86951 |
9.02 |
| 2026-06-09 00:00 |
17:46:12.16 |
-36:48:23.7 |
HIP 86951 |
8.96 |
| 2026-06-09 12:00 |
17:46:09.89 |
-36:48:24.3 |
HIP 86922 |
8.66 |
| 2026-06-10 00:00 |
17:46:07.61 |
-36:48:24.8 |
HIP 86922 |
8.35 |
| 2026-06-10 12:00 |
17:46:05.34 |
-36:48:25.3 |
HIP 86922 |
8.05 |
| 2026-06-11 00:00 |
17:46:03.06 |
-36:48:25.7 |
HIP 86922 |
7.77 |
| 2026-06-11 12:00 |
17:46:00.77 |
-36:48:26.1 |
HIP 86922 |
7.51 |
| 2026-06-12 00:00 |
17:45:58.49 |
-36:48:26.4 |
HIP 86922 |
7.26 |
| 2026-06-12 12:00 |
17:45:56.20 |
-36:48:26.7 |
HIP 86922 |
7.03 |
| 2026-06-13 00:00 |
17:45:53.91 |
-36:48:26.8 |
HIP 86922 |
6.83 |
| 2026-06-13 12:00 |
17:45:51.62 |
-36:48:27.0 |
HIP 86922 |
6.65 |
| 2026-06-14 00:00 |
17:45:49.33 |
-36:48:27.0 |
HIP 86922 |
6.49 |
| 2026-06-14 12:00 |
17:45:47.04 |
-36:48:27.0 |
HIP 86922 |
6.36 |
| 2026-06-15 00:00 |
17:45:44.74 |
-36:48:27.0 |
HIP 86922 |
6.27 |
| 2026-06-15 12:00 |
17:45:42.44 |
-36:48:26.9 |
HIP 86922 |
6.20 |
| 2026-06-16 00:00 |
17:45:40.15 |
-36:48:26.7 |
HIP 86922 |
6.17 |
| 2026-06-16 12:00 |
17:45:37.85 |
-36:48:26.5 |
HIP 86922 |
6.17 |
| 2026-06-17 00:00 |
17:45:35.55 |
-36:48:26.2 |
HIP 86922 |
6.21 |
| 2026-06-17 12:00 |
17:45:33.25 |
-36:48:25.9 |
HIP 86922 |
6.28 |
| 2026-06-18 00:00 |
17:45:30.95 |
-36:48:25.5 |
HIP 86922 |
6.37 |
| 2026-06-18 12:00 |
17:45:28.65 |
-36:48:25.0 |
HIP 86922 |
6.50 |
| 2026-06-19 00:00 |
17:45:26.35 |
-36:48:24.5 |
HIP 86922 |
6.66 |
| 2026-06-19 12:00 |
17:45:24.05 |
-36:48:24.0 |
HIP 86922 |
6.85 |
| 2026-06-20 00:00 |
17:45:21.75 |
-36:48:23.3 |
HIP 86922 |
7.06 |
| 2026-06-20 12:00 |
17:45:19.46 |
-36:48:22.6 |
HIP 86922 |
7.29 |
| 2026-06-21 00:00 |
17:45:17.16 |
-36:48:21.9 |
HIP 86922 |
7.54 |
| 2026-06-21 12:00 |
17:45:14.86 |
-36:48:21.1 |
HIP 86922 |
7.81 |
| 2026-06-22 00:00 |
17:45:12.57 |
-36:48:20.2 |
HIP 86922 |
8.09 |