メタデータ
| 項目 |
値 |
| Designation |
C/1988 F1 (Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-11-29T22:34:57.907200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:36Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
4.800 |
| K1 |
19.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1988-05-22.0000000 |
| e |
0.99771483 |
| q (au) |
1.174205 |
| a (au) |
513.837337 |
| i (deg) |
62.807742 |
| Ω (om, deg) |
288.763862 |
| ω (w, deg) |
326.514381 |
| M (ma, deg) |
0.014729 |
等級
散乱 + 全体線形
$$
M_a = (11.001 + 2.109\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.001 |
| n |
2.109 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-06-01 00:00 |
04:56:46.28 |
+64:18:17.1 |
HIP 22961 |
6.28 |
| 2026-06-01 12:00 |
04:56:50.61 |
+64:18:17.2 |
HIP 22961 |
6.46 |
| 2026-06-02 00:00 |
04:56:54.94 |
+64:18:17.3 |
HIP 22961 |
6.66 |
| 2026-06-02 12:00 |
04:56:59.27 |
+64:18:17.7 |
HIP 22961 |
6.89 |
| 2026-06-03 00:00 |
04:57:03.60 |
+64:18:18.1 |
HIP 22961 |
7.14 |
| 2026-06-03 12:00 |
04:57:07.93 |
+64:18:18.8 |
HIP 22961 |
7.41 |
| 2026-06-04 00:00 |
04:57:12.27 |
+64:18:19.5 |
HIP 22961 |
7.70 |
| 2026-06-04 12:00 |
04:57:16.61 |
+64:18:20.5 |
HIP 22961 |
8.00 |
| 2026-06-05 00:00 |
04:57:20.94 |
+64:18:21.5 |
HIP 22961 |
8.31 |
| 2026-06-05 12:00 |
04:57:25.28 |
+64:18:22.8 |
HIP 22961 |
8.64 |
| 2026-06-06 00:00 |
04:57:29.62 |
+64:18:24.1 |
HIP 22961 |
8.98 |
| 2026-06-06 12:00 |
04:57:33.96 |
+64:18:25.6 |
HIP 22961 |
9.33 |
| 2026-06-07 00:00 |
04:57:38.30 |
+64:18:27.3 |
HIP 22961 |
9.69 |
| 2026-06-07 12:00 |
04:57:42.64 |
+64:18:29.1 |
HIP 22961 |
10.05 |
| 2026-06-08 00:00 |
04:57:46.98 |
+64:18:31.1 |
HIP 22961 |
10.43 |
| 2026-06-08 12:00 |
04:57:51.32 |
+64:18:33.2 |
HIP 22961 |
10.81 |
| 2026-06-09 00:00 |
04:57:55.66 |
+64:18:35.5 |
HIP 22961 |
11.19 |
| 2026-06-09 12:00 |
04:58:00.00 |
+64:18:37.9 |
HIP 22961 |
11.58 |
| 2026-06-10 00:00 |
04:58:04.34 |
+64:18:40.4 |
HIP 22961 |
11.97 |
| 2026-06-10 12:00 |
04:58:08.67 |
+64:18:43.1 |
HIP 22961 |
12.37 |
| 2026-06-11 00:00 |
04:58:13.00 |
+64:18:46.0 |
HIP 22961 |
12.78 |
| 2026-06-11 12:00 |
04:58:17.33 |
+64:18:49.0 |
HIP 22961 |
13.18 |
| 2026-06-12 00:00 |
04:58:21.66 |
+64:18:52.1 |
HIP 22961 |
13.59 |
| 2026-06-12 12:00 |
04:58:25.98 |
+64:18:55.4 |
HIP 22961 |
14.00 |
| 2026-06-13 00:00 |
04:58:30.31 |
+64:18:58.9 |
HIP 22961 |
14.41 |
| 2026-06-13 12:00 |
04:58:34.62 |
+64:19:02.5 |
HIP 22961 |
14.83 |
| 2026-06-14 00:00 |
04:58:38.94 |
+64:19:06.2 |
HIP 22961 |
15.25 |
| 2026-06-14 12:00 |
04:58:43.25 |
+64:19:10.1 |
HIP 22961 |
15.67 |
| 2026-06-15 00:00 |
04:58:47.55 |
+64:19:14.1 |
HIP 22961 |
16.09 |
| 2026-06-15 12:00 |
04:58:51.85 |
+64:19:18.3 |
HIP 22961 |
16.51 |
| 2026-06-16 00:00 |
04:58:56.15 |
+64:19:22.6 |
HIP 22961 |
16.93 |
| 2026-06-16 12:00 |
04:59:00.44 |
+64:19:27.1 |
HIP 22961 |
17.36 |
| 2026-06-17 00:00 |
04:59:04.73 |
+64:19:31.7 |
HIP 22961 |
17.78 |
| 2026-06-17 12:00 |
04:59:09.01 |
+64:19:36.4 |
HIP 22961 |
18.21 |
| 2026-06-18 00:00 |
04:59:13.28 |
+64:19:41.3 |
HIP 22961 |
18.64 |
| 2026-06-18 12:00 |
04:59:17.55 |
+64:19:46.4 |
HIP 22961 |
19.07 |
| 2026-06-19 00:00 |
04:59:21.81 |
+64:19:51.5 |
HIP 22961 |
19.50 |
| 2026-06-19 12:00 |
04:59:26.06 |
+64:19:56.9 |
HIP 22961 |
19.93 |
| 2026-06-20 00:00 |
04:59:30.30 |
+64:20:02.3 |
HIP 22961 |
20.36 |
| 2026-06-20 12:00 |
04:59:34.54 |
+64:20:07.9 |
HIP 22961 |
20.79 |
| 2026-06-21 00:00 |
04:59:38.77 |
+64:20:13.7 |
HIP 22961 |
21.22 |
| 2026-06-21 12:00 |
04:59:43.00 |
+64:20:19.6 |
HIP 22961 |
21.65 |
| 2026-06-22 00:00 |
04:59:47.21 |
+64:20:25.6 |
HIP 22961 |
22.08 |