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 |
0.999 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
21:55:49.66 |
+45:24:42.1 |
HIP 108114 |
18.31 |
| 2026-09-20 12:00 |
21:55:47.14 |
+45:24:21.9 |
HIP 108114 |
18.06 |
| 2026-09-21 00:00 |
21:55:44.63 |
+45:24:01.4 |
HIP 108114 |
17.84 |
| 2026-09-21 12:00 |
21:55:42.14 |
+45:23:40.8 |
HIP 108114 |
17.63 |
| 2026-09-22 00:00 |
21:55:39.66 |
+45:23:20.0 |
HIP 108114 |
17.43 |
| 2026-09-22 12:00 |
21:55:37.20 |
+45:22:59.0 |
HIP 108114 |
17.26 |
| 2026-09-23 00:00 |
21:55:34.75 |
+45:22:37.9 |
HIP 108114 |
17.11 |
| 2026-09-23 12:00 |
21:55:32.31 |
+45:22:16.6 |
HIP 108114 |
16.98 |
| 2026-09-24 00:00 |
21:55:29.89 |
+45:21:55.1 |
HIP 108114 |
16.87 |
| 2026-09-24 12:00 |
21:55:27.48 |
+45:21:33.4 |
HIP 108114 |
16.78 |
| 2026-09-25 00:00 |
21:55:25.09 |
+45:21:11.6 |
HIP 108114 |
16.71 |
| 2026-09-25 12:00 |
21:55:22.71 |
+45:20:49.6 |
HIP 108114 |
16.67 |
| 2026-09-26 00:00 |
21:55:20.35 |
+45:20:27.5 |
HIP 108114 |
16.64 |
| 2026-09-26 12:00 |
21:55:18.01 |
+45:20:05.1 |
HIP 108114 |
16.64 |
| 2026-09-27 00:00 |
21:55:15.68 |
+45:19:42.7 |
HIP 108114 |
16.66 |
| 2026-09-27 12:00 |
21:55:13.36 |
+45:19:20.0 |
HIP 108114 |
16.71 |
| 2026-09-28 00:00 |
21:55:11.06 |
+45:18:57.2 |
HIP 108114 |
16.77 |
| 2026-09-28 12:00 |
21:55:08.78 |
+45:18:34.2 |
HIP 108114 |
16.86 |
| 2026-09-29 00:00 |
21:55:06.51 |
+45:18:11.1 |
HIP 108114 |
16.97 |
| 2026-09-29 12:00 |
21:55:04.26 |
+45:17:47.8 |
HIP 108114 |
17.10 |
| 2026-09-30 00:00 |
21:55:02.03 |
+45:17:24.4 |
HIP 108114 |
17.25 |
| 2026-09-30 12:00 |
21:54:59.81 |
+45:17:00.8 |
HIP 108114 |
17.42 |
| 2026-10-01 00:00 |
21:54:57.61 |
+45:16:37.1 |
HIP 108114 |
17.61 |
| 2026-10-01 12:00 |
21:54:55.43 |
+45:16:13.2 |
HIP 108114 |
17.81 |
| 2026-10-02 00:00 |
21:54:53.27 |
+45:15:49.2 |
HIP 108114 |
18.04 |
| 2026-10-02 12:00 |
21:54:51.12 |
+45:15:25.0 |
HIP 108114 |
18.28 |
| 2026-10-03 00:00 |
21:54:48.99 |
+45:15:00.7 |
HIP 108114 |
18.54 |
| 2026-10-03 12:00 |
21:54:46.88 |
+45:14:36.2 |
HIP 108114 |
18.81 |
| 2026-10-04 00:00 |
21:54:44.78 |
+45:14:11.6 |
HIP 108224 |
19.02 |
| 2026-10-04 12:00 |
21:54:42.71 |
+45:13:46.9 |
HIP 108224 |
18.81 |
| 2026-10-05 00:00 |
21:54:40.65 |
+45:13:22.0 |
HIP 108224 |
18.60 |
| 2026-10-05 12:00 |
21:54:38.61 |
+45:12:57.0 |
HIP 108224 |
18.41 |
| 2026-10-06 00:00 |
21:54:36.59 |
+45:12:31.9 |
HIP 108224 |
18.23 |
| 2026-10-06 12:00 |
21:54:34.59 |
+45:12:06.6 |
HIP 108224 |
18.06 |
| 2026-10-07 00:00 |
21:54:32.60 |
+45:11:41.2 |
HIP 108224 |
17.90 |
| 2026-10-07 12:00 |
21:54:30.64 |
+45:11:15.7 |
HIP 108224 |
17.75 |
| 2026-10-08 00:00 |
21:54:28.70 |
+45:10:50.0 |
HIP 108224 |
17.61 |
| 2026-10-08 12:00 |
21:54:26.77 |
+45:10:24.2 |
HIP 108224 |
17.49 |
| 2026-10-09 00:00 |
21:54:24.87 |
+45:09:58.3 |
HIP 108224 |
17.38 |
| 2026-10-09 12:00 |
21:54:22.98 |
+45:09:32.3 |
HIP 108224 |
17.28 |
| 2026-10-10 00:00 |
21:54:21.12 |
+45:09:06.2 |
HIP 108224 |
17.20 |
| 2026-10-10 12:00 |
21:54:19.27 |
+45:08:39.9 |
HIP 108224 |
17.13 |
| 2026-10-11 00:00 |
21:54:17.45 |
+45:08:13.6 |
HIP 108224 |
17.07 |