メタデータ
| 項目 |
値 |
| Designation |
C/1947 F1 (Rondanina-Bester) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1947-05-20T23:09:22.504320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
15 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1947-04-18.0000000 |
| e |
0.99727691 |
| q (au) |
0.559812 |
| a (au) |
205.579925 |
| i (deg) |
39.291590 |
| Ω (om, deg) |
353.903996 |
| ω (w, deg) |
303.758245 |
| M (ma, deg) |
359.988977 |
等級
散乱 + 全体線形
$$
M_a = (7.611 + 3.727\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.611 |
| n |
3.727 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.950 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
08:32:21.90 |
+54:33:02.5 |
HIP 41810 |
9.51 |
| 2026-05-12 12:00 |
08:32:22.43 |
+54:32:51.4 |
HIP 41810 |
9.47 |
| 2026-05-13 00:00 |
08:32:22.97 |
+54:32:40.2 |
HIP 41810 |
9.44 |
| 2026-05-13 12:00 |
08:32:23.53 |
+54:32:29.1 |
HIP 41810 |
9.41 |
| 2026-05-14 00:00 |
08:32:24.11 |
+54:32:17.9 |
HIP 41810 |
9.39 |
| 2026-05-14 12:00 |
08:32:24.70 |
+54:32:06.7 |
HIP 41810 |
9.37 |
| 2026-05-15 00:00 |
08:32:25.31 |
+54:31:55.6 |
HIP 41810 |
9.36 |
| 2026-05-15 12:00 |
08:32:25.93 |
+54:31:44.4 |
HIP 41810 |
9.36 |
| 2026-05-16 00:00 |
08:32:26.57 |
+54:31:33.3 |
HIP 41810 |
9.37 |
| 2026-05-16 12:00 |
08:32:27.23 |
+54:31:22.1 |
HIP 41810 |
9.38 |
| 2026-05-17 00:00 |
08:32:27.90 |
+54:31:11.0 |
HIP 41810 |
9.40 |
| 2026-05-17 12:00 |
08:32:28.59 |
+54:30:59.8 |
HIP 41810 |
9.42 |
| 2026-05-18 00:00 |
08:32:29.29 |
+54:30:48.7 |
HIP 41810 |
9.46 |
| 2026-05-18 12:00 |
08:32:30.01 |
+54:30:37.5 |
HIP 41810 |
9.49 |
| 2026-05-19 00:00 |
08:32:30.75 |
+54:30:26.4 |
HIP 41810 |
9.54 |
| 2026-05-19 12:00 |
08:32:31.50 |
+54:30:15.2 |
HIP 41810 |
9.59 |
| 2026-05-20 00:00 |
08:32:32.26 |
+54:30:04.1 |
HIP 41810 |
9.65 |
| 2026-05-20 12:00 |
08:32:33.04 |
+54:29:53.0 |
HIP 41810 |
9.72 |
| 2026-05-21 00:00 |
08:32:33.84 |
+54:29:41.9 |
HIP 41810 |
9.79 |
| 2026-05-21 12:00 |
08:32:34.65 |
+54:29:30.8 |
HIP 41810 |
9.87 |
| 2026-05-22 00:00 |
08:32:35.48 |
+54:29:19.7 |
HIP 41810 |
9.95 |
| 2026-05-22 12:00 |
08:32:36.32 |
+54:29:08.7 |
HIP 41810 |
10.05 |
| 2026-05-23 00:00 |
08:32:37.18 |
+54:28:57.6 |
HIP 41810 |
10.14 |
| 2026-05-23 12:00 |
08:32:38.05 |
+54:28:46.5 |
HIP 41810 |
10.25 |
| 2026-05-24 00:00 |
08:32:38.94 |
+54:28:35.5 |
HIP 41810 |
10.36 |
| 2026-05-24 12:00 |
08:32:39.84 |
+54:28:24.5 |
HIP 41810 |
10.47 |
| 2026-05-25 00:00 |
08:32:40.75 |
+54:28:13.5 |
HIP 41810 |
10.60 |
| 2026-05-25 12:00 |
08:32:41.68 |
+54:28:02.5 |
HIP 41810 |
10.72 |
| 2026-05-26 00:00 |
08:32:42.63 |
+54:27:51.5 |
HIP 41810 |
10.86 |
| 2026-05-26 12:00 |
08:32:43.59 |
+54:27:40.6 |
HIP 41810 |
10.99 |
| 2026-05-27 00:00 |
08:32:44.56 |
+54:27:29.6 |
HIP 41810 |
11.14 |
| 2026-05-27 12:00 |
08:32:45.55 |
+54:27:18.7 |
HIP 41810 |
11.28 |
| 2026-05-28 00:00 |
08:32:46.55 |
+54:27:07.8 |
HIP 41810 |
11.44 |
| 2026-05-28 12:00 |
08:32:47.57 |
+54:26:56.9 |
HIP 41810 |
11.60 |
| 2026-05-29 00:00 |
08:32:48.60 |
+54:26:46.1 |
HIP 41810 |
11.76 |
| 2026-05-29 12:00 |
08:32:49.65 |
+54:26:35.2 |
HIP 41810 |
11.92 |
| 2026-05-30 00:00 |
08:32:50.71 |
+54:26:24.4 |
HIP 41810 |
12.09 |
| 2026-05-30 12:00 |
08:32:51.78 |
+54:26:13.6 |
HIP 41810 |
12.27 |
| 2026-05-31 00:00 |
08:32:52.86 |
+54:26:02.8 |
HIP 41810 |
12.45 |
| 2026-05-31 12:00 |
08:32:53.96 |
+54:25:52.1 |
HIP 41810 |
12.63 |
| 2026-06-01 00:00 |
08:32:55.08 |
+54:25:41.4 |
HIP 41810 |
12.82 |
| 2026-06-01 12:00 |
08:32:56.20 |
+54:25:30.7 |
HIP 41810 |
13.01 |
| 2026-06-02 00:00 |
08:32:57.34 |
+54:25:20.0 |
HIP 41810 |
13.20 |