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) |
| 2026-03-26 00:00 |
22:02:02.90 |
+44:12:38.1 |
HIP 108774 |
7.96 |
| 2026-03-26 12:00 |
22:02:05.19 |
+44:12:58.5 |
HIP 108774 |
7.61 |
| 2026-03-27 00:00 |
22:02:07.47 |
+44:13:19.0 |
HIP 108774 |
7.28 |
| 2026-03-27 12:00 |
22:02:09.73 |
+44:13:39.7 |
HIP 108774 |
6.97 |
| 2026-03-28 00:00 |
22:02:11.97 |
+44:14:00.6 |
HIP 108774 |
6.68 |
| 2026-03-28 12:00 |
22:02:14.20 |
+44:14:21.6 |
HIP 108774 |
6.42 |
| 2026-03-29 00:00 |
22:02:16.42 |
+44:14:42.7 |
HIP 108774 |
6.20 |
| 2026-03-29 12:00 |
22:02:18.62 |
+44:15:04.0 |
HIP 108774 |
6.01 |
| 2026-03-30 00:00 |
22:02:20.80 |
+44:15:25.4 |
HIP 108774 |
5.86 |
| 2026-03-30 12:00 |
22:02:22.97 |
+44:15:47.0 |
HIP 108774 |
5.74 |
| 2026-03-31 00:00 |
22:02:25.13 |
+44:16:08.7 |
HIP 108774 |
5.68 |
| 2026-03-31 12:00 |
22:02:27.27 |
+44:16:30.5 |
HIP 108774 |
5.66 |
| 2026-04-01 00:00 |
22:02:29.39 |
+44:16:52.5 |
HIP 108774 |
5.68 |
| 2026-04-01 12:00 |
22:02:31.49 |
+44:17:14.5 |
HIP 108774 |
5.75 |
| 2026-04-02 00:00 |
22:02:33.58 |
+44:17:36.8 |
HIP 108774 |
5.86 |
| 2026-04-02 12:00 |
22:02:35.66 |
+44:17:59.1 |
HIP 108774 |
6.01 |
| 2026-04-03 00:00 |
22:02:37.71 |
+44:18:21.6 |
HIP 108774 |
6.20 |
| 2026-04-03 12:00 |
22:02:39.75 |
+44:18:44.2 |
HIP 108774 |
6.42 |
| 2026-04-04 00:00 |
22:02:41.78 |
+44:19:07.0 |
HIP 108774 |
6.68 |
| 2026-04-04 12:00 |
22:02:43.79 |
+44:19:29.8 |
HIP 108774 |
6.96 |
| 2026-04-05 00:00 |
22:02:45.78 |
+44:19:52.8 |
HIP 108774 |
7.26 |
| 2026-04-05 12:00 |
22:02:47.75 |
+44:20:15.9 |
HIP 108774 |
7.59 |
| 2026-04-06 00:00 |
22:02:49.70 |
+44:20:39.1 |
HIP 108774 |
7.93 |
| 2026-04-06 12:00 |
22:02:51.64 |
+44:21:02.5 |
HIP 108774 |
8.29 |
| 2026-04-07 00:00 |
22:02:53.56 |
+44:21:25.9 |
HIP 108774 |
8.66 |
| 2026-04-07 12:00 |
22:02:55.47 |
+44:21:49.5 |
HIP 108774 |
9.04 |
| 2026-04-08 00:00 |
22:02:57.35 |
+44:22:13.1 |
HIP 108774 |
9.44 |
| 2026-04-08 12:00 |
22:02:59.22 |
+44:22:36.9 |
HIP 108774 |
9.84 |
| 2026-04-09 00:00 |
22:03:01.07 |
+44:23:00.8 |
HIP 108774 |
10.25 |
| 2026-04-09 12:00 |
22:03:02.90 |
+44:23:24.8 |
HIP 108774 |
10.67 |
| 2026-04-10 00:00 |
22:03:04.71 |
+44:23:48.9 |
HIP 108774 |
11.09 |
| 2026-04-10 12:00 |
22:03:06.50 |
+44:24:13.2 |
HIP 108933 |
11.32 |
| 2026-04-11 00:00 |
22:03:08.28 |
+44:24:37.5 |
HIP 108933 |
11.15 |
| 2026-04-11 12:00 |
22:03:10.04 |
+44:25:01.9 |
HIP 108933 |
11.01 |
| 2026-04-12 00:00 |
22:03:11.77 |
+44:25:26.4 |
HIP 108933 |
10.90 |
| 2026-04-12 12:00 |
22:03:13.49 |
+44:25:51.0 |
HIP 108933 |
10.81 |
| 2026-04-13 00:00 |
22:03:15.19 |
+44:26:15.7 |
HIP 108933 |
10.75 |
| 2026-04-13 12:00 |
22:03:16.87 |
+44:26:40.5 |
HIP 108933 |
10.72 |
| 2026-04-14 00:00 |
22:03:18.53 |
+44:27:05.4 |
HIP 108922 |
10.23 |
| 2026-04-14 12:00 |
22:03:20.17 |
+44:27:30.4 |
HIP 108922 |
9.72 |
| 2026-04-15 00:00 |
22:03:21.80 |
+44:27:55.5 |
HIP 108922 |
9.22 |
| 2026-04-15 12:00 |
22:03:23.40 |
+44:28:20.6 |
HIP 108922 |
8.71 |
| 2026-04-16 00:00 |
22:03:24.98 |
+44:28:45.9 |
HIP 108922 |
8.20 |