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) |
| 2026-07-29 00:00 |
06:38:06.51 |
+21:31:29.0 |
HIP 31663 |
13.02 |
| 2026-07-29 12:00 |
06:38:07.71 |
+21:31:27.7 |
HIP 31663 |
13.19 |
| 2026-07-30 00:00 |
06:38:08.91 |
+21:31:26.4 |
HIP 31663 |
13.36 |
| 2026-07-30 12:00 |
06:38:10.10 |
+21:31:25.1 |
HIP 31663 |
13.53 |
| 2026-07-31 00:00 |
06:38:11.28 |
+21:31:23.9 |
HIP 31663 |
13.70 |
| 2026-07-31 12:00 |
06:38:12.46 |
+21:31:22.6 |
HIP 31663 |
13.88 |
| 2026-08-01 00:00 |
06:38:13.63 |
+21:31:21.3 |
HIP 31663 |
14.06 |
| 2026-08-01 12:00 |
06:38:14.80 |
+21:31:20.0 |
HIP 31663 |
14.24 |
| 2026-08-02 00:00 |
06:38:15.96 |
+21:31:18.8 |
HIP 31663 |
14.42 |
| 2026-08-02 12:00 |
06:38:17.12 |
+21:31:17.5 |
HIP 31663 |
14.61 |
| 2026-08-03 00:00 |
06:38:18.27 |
+21:31:16.2 |
HIP 31663 |
14.79 |
| 2026-08-03 12:00 |
06:38:19.42 |
+21:31:15.0 |
HIP 31663 |
14.98 |
| 2026-08-04 00:00 |
06:38:20.56 |
+21:31:13.7 |
HIP 31663 |
15.17 |
| 2026-08-04 12:00 |
06:38:21.69 |
+21:31:12.4 |
HIP 31663 |
15.36 |
| 2026-08-05 00:00 |
06:38:22.82 |
+21:31:11.2 |
HIP 31663 |
15.55 |
| 2026-08-05 12:00 |
06:38:23.94 |
+21:31:09.9 |
HIP 31663 |
15.75 |
| 2026-08-06 00:00 |
06:38:25.06 |
+21:31:08.6 |
HIP 31663 |
15.94 |
| 2026-08-06 12:00 |
06:38:26.17 |
+21:31:07.4 |
HIP 31663 |
16.14 |
| 2026-08-07 00:00 |
06:38:27.27 |
+21:31:06.1 |
HIP 31663 |
16.33 |
| 2026-08-07 12:00 |
06:38:28.37 |
+21:31:04.8 |
HIP 31663 |
16.53 |
| 2026-08-08 00:00 |
06:38:29.46 |
+21:31:03.6 |
HIP 31663 |
16.73 |
| 2026-08-08 12:00 |
06:38:30.54 |
+21:31:02.3 |
HIP 31663 |
16.92 |
| 2026-08-09 00:00 |
06:38:31.62 |
+21:31:01.1 |
HIP 31663 |
17.12 |
| 2026-08-09 12:00 |
06:38:32.69 |
+21:30:59.8 |
HIP 31663 |
17.32 |
| 2026-08-10 00:00 |
06:38:33.75 |
+21:30:58.6 |
HIP 31663 |
17.52 |
| 2026-08-10 12:00 |
06:38:34.81 |
+21:30:57.3 |
HIP 31663 |
17.71 |
| 2026-08-11 00:00 |
06:38:35.86 |
+21:30:56.1 |
HIP 31663 |
17.91 |
| 2026-08-11 12:00 |
06:38:36.90 |
+21:30:54.8 |
HIP 31663 |
18.11 |
| 2026-08-12 00:00 |
06:38:37.94 |
+21:30:53.6 |
HIP 31663 |
18.31 |
| 2026-08-12 12:00 |
06:38:38.96 |
+21:30:52.4 |
HIP 31663 |
18.50 |
| 2026-08-13 00:00 |
06:38:39.99 |
+21:30:51.1 |
HIP 31663 |
18.70 |
| 2026-08-13 12:00 |
06:38:41.00 |
+21:30:49.9 |
HIP 31663 |
18.90 |
| 2026-08-14 00:00 |
06:38:42.01 |
+21:30:48.7 |
HIP 31663 |
19.09 |
| 2026-08-14 12:00 |
06:38:43.00 |
+21:30:47.5 |
HIP 31663 |
19.29 |
| 2026-08-15 00:00 |
06:38:43.99 |
+21:30:46.2 |
HIP 31663 |
19.48 |
| 2026-08-15 12:00 |
06:38:44.98 |
+21:30:45.0 |
HIP 31663 |
19.68 |
| 2026-08-16 00:00 |
06:38:45.95 |
+21:30:43.8 |
HIP 31663 |
19.87 |
| 2026-08-16 12:00 |
06:38:46.92 |
+21:30:42.6 |
HIP 31663 |
20.06 |
| 2026-08-17 00:00 |
06:38:47.88 |
+21:30:41.4 |
HIP 31663 |
20.26 |
| 2026-08-17 12:00 |
06:38:48.83 |
+21:30:40.2 |
HIP 31663 |
20.45 |
| 2026-08-18 00:00 |
06:38:49.78 |
+21:30:39.0 |
HIP 31663 |
20.64 |
| 2026-08-18 12:00 |
06:38:50.71 |
+21:30:37.8 |
HIP 31663 |
20.83 |
| 2026-08-19 00:00 |
06:38:51.64 |
+21:30:36.6 |
HIP 31663 |
21.01 |