メタデータ
| 項目 |
値 |
| Designation |
C/1992 W1 (Ohshita) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-11-01T14:50:48.024960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:43Z |
| Obs used |
85 |
| NEO |
- |
| M1 |
12.300 |
| K1 |
20.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1992-12-18.0000000 |
| e |
0.99301266 |
| q (au) |
0.664826 |
| a (au) |
95.147254 |
| i (deg) |
115.137808 |
| Ω (om, deg) |
138.404186 |
| ω (w, deg) |
310.170779 |
| M (ma, deg) |
0.049255 |
等級
散乱 + 全体線形
$$
M_a = (11.403 + 3.249\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.403 |
| n |
3.249 |
| gf |
0.992 |
| gb |
-0.649 |
| k |
1.000 |
| δ90 |
2.347 |
| 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) |
| 2026-05-12 00:00 |
22:04:17.42 |
+44:51:46.2 |
HIP 108884 |
15.64 |
| 2026-05-12 12:00 |
22:04:17.82 |
+44:52:13.2 |
HIP 108884 |
16.04 |
| 2026-05-13 00:00 |
22:04:18.20 |
+44:52:40.1 |
HIP 108884 |
16.44 |
| 2026-05-13 12:00 |
22:04:18.55 |
+44:53:07.1 |
HIP 108884 |
16.84 |
| 2026-05-14 00:00 |
22:04:18.88 |
+44:53:34.0 |
HIP 108884 |
17.24 |
| 2026-05-14 12:00 |
22:04:19.19 |
+44:54:00.8 |
HIP 108884 |
17.64 |
| 2026-05-15 00:00 |
22:04:19.47 |
+44:54:27.7 |
HIP 108884 |
18.04 |
| 2026-05-15 12:00 |
22:04:19.73 |
+44:54:54.5 |
HIP 108884 |
18.44 |
| 2026-05-16 00:00 |
22:04:19.96 |
+44:55:21.3 |
HIP 108884 |
18.83 |
| 2026-05-16 12:00 |
22:04:20.17 |
+44:55:48.1 |
HIP 109102 |
18.70 |
| 2026-05-17 00:00 |
22:04:20.35 |
+44:56:14.8 |
HIP 109102 |
18.55 |
| 2026-05-17 12:00 |
22:04:20.51 |
+44:56:41.5 |
HIP 109102 |
18.42 |
| 2026-05-18 00:00 |
22:04:20.65 |
+44:57:08.1 |
HIP 109102 |
18.30 |
| 2026-05-18 12:00 |
22:04:20.76 |
+44:57:34.7 |
HIP 109102 |
18.19 |
| 2026-05-19 00:00 |
22:04:20.85 |
+44:58:01.3 |
HIP 109079 |
18.07 |
| 2026-05-19 12:00 |
22:04:20.91 |
+44:58:27.8 |
HIP 109079 |
17.85 |
| 2026-05-20 00:00 |
22:04:20.95 |
+44:58:54.3 |
HIP 109079 |
17.65 |
| 2026-05-20 12:00 |
22:04:20.96 |
+44:59:20.7 |
HIP 109079 |
17.45 |
| 2026-05-21 00:00 |
22:04:20.95 |
+44:59:47.1 |
HIP 109079 |
17.27 |
| 2026-05-21 12:00 |
22:04:20.92 |
+45:00:13.4 |
HIP 109079 |
17.10 |
| 2026-05-22 00:00 |
22:04:20.86 |
+45:00:39.6 |
HIP 109079 |
16.95 |
| 2026-05-22 12:00 |
22:04:20.77 |
+45:01:05.8 |
HIP 109079 |
16.81 |
| 2026-05-23 00:00 |
22:04:20.67 |
+45:01:32.0 |
HIP 109079 |
16.69 |
| 2026-05-23 12:00 |
22:04:20.54 |
+45:01:58.1 |
HIP 109079 |
16.58 |
| 2026-05-24 00:00 |
22:04:20.38 |
+45:02:24.1 |
HIP 109079 |
16.48 |
| 2026-05-24 12:00 |
22:04:20.20 |
+45:02:50.0 |
HIP 109079 |
16.40 |
| 2026-05-25 00:00 |
22:04:19.99 |
+45:03:15.9 |
HIP 109079 |
16.34 |
| 2026-05-25 12:00 |
22:04:19.76 |
+45:03:41.8 |
HIP 109079 |
16.29 |
| 2026-05-26 00:00 |
22:04:19.51 |
+45:04:07.5 |
HIP 109079 |
16.26 |
| 2026-05-26 12:00 |
22:04:19.23 |
+45:04:33.2 |
HIP 109079 |
16.25 |
| 2026-05-27 00:00 |
22:04:18.93 |
+45:04:58.8 |
HIP 109079 |
16.25 |
| 2026-05-27 12:00 |
22:04:18.61 |
+45:05:24.3 |
HIP 109079 |
16.26 |
| 2026-05-28 00:00 |
22:04:18.26 |
+45:05:49.8 |
HIP 109079 |
16.29 |
| 2026-05-28 12:00 |
22:04:17.88 |
+45:06:15.2 |
HIP 109079 |
16.34 |
| 2026-05-29 00:00 |
22:04:17.49 |
+45:06:40.5 |
HIP 109079 |
16.40 |
| 2026-05-29 12:00 |
22:04:17.06 |
+45:07:05.7 |
HIP 109079 |
16.48 |
| 2026-05-30 00:00 |
22:04:16.62 |
+45:07:30.8 |
HIP 109079 |
16.57 |
| 2026-05-30 12:00 |
22:04:16.15 |
+45:07:55.9 |
HIP 109079 |
16.67 |
| 2026-05-31 00:00 |
22:04:15.65 |
+45:08:20.9 |
HIP 109079 |
16.79 |
| 2026-05-31 12:00 |
22:04:15.14 |
+45:08:45.7 |
HIP 109079 |
16.93 |
| 2026-06-01 00:00 |
22:04:14.59 |
+45:09:10.5 |
HIP 109079 |
17.08 |
| 2026-06-01 12:00 |
22:04:14.03 |
+45:09:35.2 |
HIP 109079 |
17.24 |
| 2026-06-02 00:00 |
22:04:13.44 |
+45:09:59.8 |
HIP 109079 |
17.41 |