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) |
| 2026-09-20 00:00 |
17:41:04.63 |
-36:34:34.6 |
HIP 86434 |
25.73 |
| 2026-09-20 12:00 |
17:41:04.76 |
-36:34:28.5 |
HIP 86434 |
25.67 |
| 2026-09-21 00:00 |
17:41:04.90 |
-36:34:22.3 |
HIP 86434 |
25.62 |
| 2026-09-21 12:00 |
17:41:05.07 |
-36:34:16.2 |
HIP 86434 |
25.57 |
| 2026-09-22 00:00 |
17:41:05.26 |
-36:34:10.1 |
HIP 86434 |
25.52 |
| 2026-09-22 12:00 |
17:41:05.46 |
-36:34:04.0 |
HIP 86434 |
25.47 |
| 2026-09-23 00:00 |
17:41:05.69 |
-36:33:57.9 |
HIP 86434 |
25.43 |
| 2026-09-23 12:00 |
17:41:05.93 |
-36:33:51.9 |
HIP 86434 |
25.40 |
| 2026-09-24 00:00 |
17:41:06.19 |
-36:33:45.8 |
HIP 86434 |
25.36 |
| 2026-09-24 12:00 |
17:41:06.48 |
-36:33:39.8 |
HIP 86434 |
25.33 |
| 2026-09-25 00:00 |
17:41:06.78 |
-36:33:33.7 |
HIP 86434 |
25.30 |
| 2026-09-25 12:00 |
17:41:07.10 |
-36:33:27.7 |
HIP 86434 |
25.28 |
| 2026-09-26 00:00 |
17:41:07.45 |
-36:33:21.7 |
HIP 86434 |
25.26 |
| 2026-09-26 12:00 |
17:41:07.81 |
-36:33:15.7 |
HIP 86434 |
25.24 |
| 2026-09-27 00:00 |
17:41:08.19 |
-36:33:09.8 |
HIP 86434 |
25.22 |
| 2026-09-27 12:00 |
17:41:08.59 |
-36:33:03.8 |
HIP 86434 |
25.21 |
| 2026-09-28 00:00 |
17:41:09.01 |
-36:32:57.9 |
HIP 86434 |
25.21 |
| 2026-09-28 12:00 |
17:41:09.45 |
-36:32:52.0 |
HIP 86434 |
25.21 |
| 2026-09-29 00:00 |
17:41:09.91 |
-36:32:46.1 |
HIP 86434 |
25.21 |
| 2026-09-29 12:00 |
17:41:10.39 |
-36:32:40.2 |
HIP 86434 |
25.21 |
| 2026-09-30 00:00 |
17:41:10.89 |
-36:32:34.3 |
HIP 86434 |
25.22 |
| 2026-09-30 12:00 |
17:41:11.40 |
-36:32:28.5 |
HIP 86434 |
25.23 |
| 2026-10-01 00:00 |
17:41:11.94 |
-36:32:22.7 |
HIP 86434 |
25.25 |
| 2026-10-01 12:00 |
17:41:12.50 |
-36:32:16.9 |
HIP 86434 |
25.27 |
| 2026-10-02 00:00 |
17:41:13.07 |
-36:32:11.1 |
HIP 86434 |
25.29 |
| 2026-10-02 12:00 |
17:41:13.67 |
-36:32:05.3 |
HIP 86434 |
25.32 |
| 2026-10-03 00:00 |
17:41:14.28 |
-36:31:59.6 |
HIP 86434 |
25.36 |
| 2026-10-03 12:00 |
17:41:14.91 |
-36:31:53.8 |
HIP 86434 |
25.39 |
| 2026-10-04 00:00 |
17:41:15.57 |
-36:31:48.2 |
HIP 86434 |
25.43 |
| 2026-10-04 12:00 |
17:41:16.24 |
-36:31:42.5 |
HIP 86434 |
25.48 |
| 2026-10-05 00:00 |
17:41:16.93 |
-36:31:36.8 |
HIP 86434 |
25.53 |
| 2026-10-05 12:00 |
17:41:17.64 |
-36:31:31.2 |
HIP 86434 |
25.58 |
| 2026-10-06 00:00 |
17:41:18.36 |
-36:31:25.6 |
HIP 86434 |
25.64 |
| 2026-10-06 12:00 |
17:41:19.11 |
-36:31:20.0 |
HIP 86434 |
25.70 |
| 2026-10-07 00:00 |
17:41:19.88 |
-36:31:14.4 |
HIP 86434 |
25.77 |
| 2026-10-07 12:00 |
17:41:20.66 |
-36:31:08.9 |
HIP 86434 |
25.84 |
| 2026-10-08 00:00 |
17:41:21.47 |
-36:31:03.4 |
HIP 86434 |
25.92 |
| 2026-10-08 12:00 |
17:41:22.29 |
-36:30:57.9 |
HIP 86434 |
26.00 |
| 2026-10-09 00:00 |
17:41:23.13 |
-36:30:52.5 |
HIP 86434 |
26.08 |
| 2026-10-09 12:00 |
17:41:23.99 |
-36:30:47.0 |
HIP 86434 |
26.17 |
| 2026-10-10 00:00 |
17:41:24.87 |
-36:30:41.6 |
HIP 86434 |
26.26 |
| 2026-10-10 12:00 |
17:41:25.77 |
-36:30:36.3 |
HIP 86434 |
26.36 |
| 2026-10-11 00:00 |
17:41:26.68 |
-36:30:30.9 |
HIP 86434 |
26.46 |