メタデータ
| 項目 |
値 |
| Designation |
C/1959 O1 (Bester-Hoffmeister) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-07-17T13:20:03.840000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
29 |
| 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) |
1959-07-11.0000000 |
| e |
1.00267900 |
| q (au) |
1.250534 |
| a (au) |
-466.791340 |
| i (deg) |
12.832200 |
| Ω (om, deg) |
105.735000 |
| ω (w, deg) |
186.506900 |
| M (ma, deg) |
-0.000641 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
06:34:53.14 |
+21:33:54.7 |
HIP 31366 |
6.01 |
| 2026-05-12 12:00 |
06:34:54.07 |
+21:33:54.4 |
HIP 31366 |
6.16 |
| 2026-05-13 00:00 |
06:34:55.00 |
+21:33:54.1 |
HIP 31366 |
6.31 |
| 2026-05-13 12:00 |
06:34:55.95 |
+21:33:53.7 |
HIP 31366 |
6.46 |
| 2026-05-14 00:00 |
06:34:56.90 |
+21:33:53.4 |
HIP 31366 |
6.62 |
| 2026-05-14 12:00 |
06:34:57.86 |
+21:33:53.0 |
HIP 31366 |
6.79 |
| 2026-05-15 00:00 |
06:34:58.83 |
+21:33:52.6 |
HIP 31366 |
6.96 |
| 2026-05-15 12:00 |
06:34:59.81 |
+21:33:52.3 |
HIP 31366 |
7.13 |
| 2026-05-16 00:00 |
06:35:00.79 |
+21:33:51.9 |
HIP 31366 |
7.31 |
| 2026-05-16 12:00 |
06:35:01.79 |
+21:33:51.5 |
HIP 31366 |
7.50 |
| 2026-05-17 00:00 |
06:35:02.79 |
+21:33:51.0 |
HIP 31366 |
7.68 |
| 2026-05-17 12:00 |
06:35:03.79 |
+21:33:50.6 |
HIP 31366 |
7.87 |
| 2026-05-18 00:00 |
06:35:04.81 |
+21:33:50.2 |
HIP 31366 |
8.07 |
| 2026-05-18 12:00 |
06:35:05.83 |
+21:33:49.8 |
HIP 31366 |
8.27 |
| 2026-05-19 00:00 |
06:35:06.86 |
+21:33:49.3 |
HIP 31366 |
8.47 |
| 2026-05-19 12:00 |
06:35:07.90 |
+21:33:48.8 |
HIP 31366 |
8.68 |
| 2026-05-20 00:00 |
06:35:08.94 |
+21:33:48.4 |
HIP 31366 |
8.88 |
| 2026-05-20 12:00 |
06:35:10.00 |
+21:33:47.9 |
HIP 31366 |
9.10 |
| 2026-05-21 00:00 |
06:35:11.05 |
+21:33:47.4 |
HIP 31366 |
9.31 |
| 2026-05-21 12:00 |
06:35:12.12 |
+21:33:46.9 |
HIP 31366 |
9.53 |
| 2026-05-22 00:00 |
06:35:13.19 |
+21:33:46.4 |
HIP 31366 |
9.75 |
| 2026-05-22 12:00 |
06:35:14.27 |
+21:33:45.9 |
HIP 31366 |
9.97 |
| 2026-05-23 00:00 |
06:35:15.36 |
+21:33:45.3 |
HIP 31366 |
10.20 |
| 2026-05-23 12:00 |
06:35:16.45 |
+21:33:44.8 |
HIP 31366 |
10.43 |
| 2026-05-24 00:00 |
06:35:17.55 |
+21:33:44.2 |
HIP 31366 |
10.66 |
| 2026-05-24 12:00 |
06:35:18.65 |
+21:33:43.7 |
HIP 31366 |
10.90 |
| 2026-05-25 00:00 |
06:35:19.76 |
+21:33:43.1 |
HIP 31366 |
11.13 |
| 2026-05-25 12:00 |
06:35:20.88 |
+21:33:42.5 |
HIP 31366 |
11.37 |
| 2026-05-26 00:00 |
06:35:22.00 |
+21:33:41.9 |
HIP 31366 |
11.61 |
| 2026-05-26 12:00 |
06:35:23.13 |
+21:33:41.3 |
HIP 31366 |
11.86 |
| 2026-05-27 00:00 |
06:35:24.27 |
+21:33:40.7 |
HIP 31366 |
12.10 |
| 2026-05-27 12:00 |
06:35:25.41 |
+21:33:40.1 |
HIP 31366 |
12.35 |
| 2026-05-28 00:00 |
06:35:26.56 |
+21:33:39.5 |
HIP 31366 |
12.60 |
| 2026-05-28 12:00 |
06:35:27.71 |
+21:33:38.8 |
HIP 31366 |
12.85 |
| 2026-05-29 00:00 |
06:35:28.87 |
+21:33:38.2 |
HIP 31366 |
13.10 |
| 2026-05-29 12:00 |
06:35:30.03 |
+21:33:37.5 |
HIP 31366 |
13.36 |
| 2026-05-30 00:00 |
06:35:31.20 |
+21:33:36.9 |
HIP 31366 |
13.62 |
| 2026-05-30 12:00 |
06:35:32.38 |
+21:33:36.2 |
HIP 31366 |
13.88 |
| 2026-05-31 00:00 |
06:35:33.56 |
+21:33:35.5 |
HIP 31366 |
14.14 |
| 2026-05-31 12:00 |
06:35:34.75 |
+21:33:34.8 |
HIP 31366 |
14.40 |
| 2026-06-01 00:00 |
06:35:35.94 |
+21:33:34.1 |
HIP 31366 |
14.66 |
| 2026-06-01 12:00 |
06:35:37.13 |
+21:33:33.4 |
HIP 31366 |
14.93 |
| 2026-06-02 00:00 |
06:35:38.34 |
+21:33:32.7 |
HIP 31366 |
15.20 |