メタデータ
| 項目 |
値 |
| Designation |
C/1989 Q1 (Okazaki-Levy-Rudenko) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1989-11-11T21:59:23.887680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:38Z |
| Obs used |
225 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
11.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1989-10-08.0000000 |
| e |
1.00005568 |
| q (au) |
0.642331 |
| a (au) |
-11536.096034 |
| i (deg) |
90.145942 |
| Ω (om, deg) |
275.510071 |
| ω (w, deg) |
150.571089 |
| M (ma, deg) |
-0.000028 |
等級
散乱 + 全体線形
$$
M_a = (7.901 + 2.905\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.901 |
| n |
2.905 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.286 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1989-08-24 |
1989-09-13 |
+19.0917 |
-2.707 |
| 1989-09-13 |
1989-11-11 |
-0.2123 |
-0.358 |
| 1989-11-12 |
1990-01-05 |
+1.0681 |
+0.558 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
18:46:32.88 |
-64:50:43.0 |
HIP 92024 |
7.18 |
| 2026-05-12 12:00 |
18:46:29.97 |
-64:50:58.4 |
HIP 92024 |
6.82 |
| 2026-05-13 00:00 |
18:46:27.02 |
-64:51:13.7 |
HIP 92024 |
6.47 |
| 2026-05-13 12:00 |
18:46:24.04 |
-64:51:28.9 |
HIP 92024 |
6.12 |
| 2026-05-14 00:00 |
18:46:21.04 |
-64:51:44.0 |
HIP 92024 |
5.78 |
| 2026-05-14 12:00 |
18:46:18.00 |
-64:51:59.0 |
HIP 92024 |
5.44 |
| 2026-05-15 00:00 |
18:46:14.93 |
-64:52:13.9 |
HIP 92024 |
5.10 |
| 2026-05-15 12:00 |
18:46:11.84 |
-64:52:28.7 |
HIP 92024 |
4.78 |
| 2026-05-16 00:00 |
18:46:08.71 |
-64:52:43.4 |
HIP 92024 |
4.47 |
| 2026-05-16 12:00 |
18:46:05.56 |
-64:52:58.0 |
HIP 92024 |
4.17 |
| 2026-05-17 00:00 |
18:46:02.38 |
-64:53:12.5 |
HIP 92024 |
3.89 |
| 2026-05-17 12:00 |
18:45:59.16 |
-64:53:26.8 |
HIP 92024 |
3.63 |
| 2026-05-18 00:00 |
18:45:55.92 |
-64:53:41.1 |
HIP 92024 |
3.40 |
| 2026-05-18 12:00 |
18:45:52.66 |
-64:53:55.2 |
HIP 92024 |
3.20 |
| 2026-05-19 00:00 |
18:45:49.36 |
-64:54:09.2 |
HIP 92024 |
3.05 |
| 2026-05-19 12:00 |
18:45:46.04 |
-64:54:23.1 |
HIP 92024 |
2.95 |
| 2026-05-20 00:00 |
18:45:42.69 |
-64:54:36.9 |
HIP 92024 |
2.90 |
| 2026-05-20 12:00 |
18:45:39.31 |
-64:54:50.6 |
HIP 92024 |
2.91 |
| 2026-05-21 00:00 |
18:45:35.90 |
-64:55:04.1 |
HIP 92024 |
2.97 |
| 2026-05-21 12:00 |
18:45:32.47 |
-64:55:17.6 |
HIP 92024 |
3.10 |
| 2026-05-22 00:00 |
18:45:29.02 |
-64:55:30.9 |
HIP 92024 |
3.27 |
| 2026-05-22 12:00 |
18:45:25.53 |
-64:55:44.1 |
HIP 92024 |
3.48 |
| 2026-05-23 00:00 |
18:45:22.03 |
-64:55:57.2 |
HIP 92024 |
3.73 |
| 2026-05-23 12:00 |
18:45:18.49 |
-64:56:10.1 |
HIP 92024 |
4.01 |
| 2026-05-24 00:00 |
18:45:14.94 |
-64:56:22.9 |
HIP 92024 |
4.32 |
| 2026-05-24 12:00 |
18:45:11.35 |
-64:56:35.6 |
HIP 92024 |
4.64 |
| 2026-05-25 00:00 |
18:45:07.75 |
-64:56:48.2 |
HIP 92024 |
4.98 |
| 2026-05-25 12:00 |
18:45:04.11 |
-64:57:00.6 |
HIP 92024 |
5.33 |
| 2026-05-26 00:00 |
18:45:00.46 |
-64:57:12.9 |
HIP 92024 |
5.70 |
| 2026-05-26 12:00 |
18:44:56.78 |
-64:57:25.1 |
HIP 92024 |
6.07 |
| 2026-05-27 00:00 |
18:44:53.08 |
-64:57:37.2 |
HIP 92024 |
6.45 |
| 2026-05-27 12:00 |
18:44:49.35 |
-64:57:49.1 |
HIP 92024 |
6.84 |
| 2026-05-28 00:00 |
18:44:45.61 |
-64:58:00.9 |
HIP 92024 |
7.23 |
| 2026-05-28 12:00 |
18:44:41.84 |
-64:58:12.6 |
HIP 92024 |
7.63 |
| 2026-05-29 00:00 |
18:44:38.04 |
-64:58:24.1 |
HIP 92024 |
8.03 |
| 2026-05-29 12:00 |
18:44:34.23 |
-64:58:35.5 |
HIP 92024 |
8.44 |
| 2026-05-30 00:00 |
18:44:30.39 |
-64:58:46.7 |
HIP 92024 |
8.85 |
| 2026-05-30 12:00 |
18:44:26.54 |
-64:58:57.8 |
HIP 92024 |
9.27 |
| 2026-05-31 00:00 |
18:44:22.66 |
-64:59:08.8 |
HIP 92024 |
9.68 |
| 2026-05-31 12:00 |
18:44:18.76 |
-64:59:19.6 |
HIP 92024 |
10.10 |
| 2026-06-01 00:00 |
18:44:14.84 |
-64:59:30.3 |
HIP 92024 |
10.53 |
| 2026-06-01 12:00 |
18:44:10.90 |
-64:59:40.9 |
HIP 92024 |
10.95 |
| 2026-06-02 00:00 |
18:44:06.94 |
-64:59:51.3 |
HIP 92024 |
11.38 |