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) |
| 2026-09-20 00:00 |
06:39:31.51 |
+21:29:33.4 |
HIP 31663 |
29.56 |
| 2026-09-20 12:00 |
06:39:31.80 |
+21:29:32.7 |
HIP 31663 |
29.62 |
| 2026-09-21 00:00 |
06:39:32.07 |
+21:29:32.0 |
HIP 31663 |
29.69 |
| 2026-09-21 12:00 |
06:39:32.33 |
+21:29:31.2 |
HIP 31663 |
29.74 |
| 2026-09-22 00:00 |
06:39:32.58 |
+21:29:30.6 |
HIP 31663 |
29.80 |
| 2026-09-22 12:00 |
06:39:32.82 |
+21:29:29.9 |
HIP 31663 |
29.86 |
| 2026-09-23 00:00 |
06:39:33.04 |
+21:29:29.2 |
HIP 31663 |
29.91 |
| 2026-09-23 12:00 |
06:39:33.26 |
+21:29:28.5 |
HIP 31663 |
29.96 |
| 2026-09-24 00:00 |
06:39:33.46 |
+21:29:27.9 |
HIP 31663 |
30.01 |
| 2026-09-24 12:00 |
06:39:33.66 |
+21:29:27.2 |
HIP 31663 |
30.05 |
| 2026-09-25 00:00 |
06:39:33.84 |
+21:29:26.6 |
HIP 31663 |
30.09 |
| 2026-09-25 12:00 |
06:39:34.01 |
+21:29:26.0 |
HIP 31663 |
30.13 |
| 2026-09-26 00:00 |
06:39:34.16 |
+21:29:25.3 |
HIP 31663 |
30.17 |
| 2026-09-26 12:00 |
06:39:34.31 |
+21:29:24.7 |
HIP 31663 |
30.21 |
| 2026-09-27 00:00 |
06:39:34.45 |
+21:29:24.1 |
HIP 31663 |
30.24 |
| 2026-09-27 12:00 |
06:39:34.57 |
+21:29:23.6 |
HIP 31663 |
30.27 |
| 2026-09-28 00:00 |
06:39:34.68 |
+21:29:23.0 |
HIP 31663 |
30.30 |
| 2026-09-28 12:00 |
06:39:34.78 |
+21:29:22.4 |
HIP 31663 |
30.32 |
| 2026-09-29 00:00 |
06:39:34.87 |
+21:29:21.9 |
HIP 31663 |
30.35 |
| 2026-09-29 12:00 |
06:39:34.95 |
+21:29:21.3 |
HIP 31663 |
30.37 |
| 2026-09-30 00:00 |
06:39:35.02 |
+21:29:20.8 |
HIP 31663 |
30.38 |
| 2026-09-30 12:00 |
06:39:35.07 |
+21:29:20.3 |
HIP 31663 |
30.40 |
| 2026-10-01 00:00 |
06:39:35.12 |
+21:29:19.8 |
HIP 31663 |
30.41 |
| 2026-10-01 12:00 |
06:39:35.15 |
+21:29:19.3 |
HIP 31663 |
30.42 |
| 2026-10-02 00:00 |
06:39:35.17 |
+21:29:18.8 |
HIP 31663 |
30.43 |
| 2026-10-02 12:00 |
06:39:35.18 |
+21:29:18.3 |
HIP 31663 |
30.43 |
| 2026-10-03 00:00 |
06:39:35.17 |
+21:29:17.8 |
HIP 31663 |
30.44 |
| 2026-10-03 12:00 |
06:39:35.16 |
+21:29:17.4 |
HIP 31663 |
30.44 |
| 2026-10-04 00:00 |
06:39:35.13 |
+21:29:16.9 |
HIP 31663 |
30.44 |
| 2026-10-04 12:00 |
06:39:35.09 |
+21:29:16.5 |
HIP 31663 |
30.43 |
| 2026-10-05 00:00 |
06:39:35.04 |
+21:29:16.1 |
HIP 31663 |
30.42 |
| 2026-10-05 12:00 |
06:39:34.98 |
+21:29:15.6 |
HIP 31663 |
30.41 |
| 2026-10-06 00:00 |
06:39:34.91 |
+21:29:15.2 |
HIP 31663 |
30.40 |
| 2026-10-06 12:00 |
06:39:34.82 |
+21:29:14.9 |
HIP 31663 |
30.39 |
| 2026-10-07 00:00 |
06:39:34.73 |
+21:29:14.5 |
HIP 31663 |
30.37 |
| 2026-10-07 12:00 |
06:39:34.62 |
+21:29:14.1 |
HIP 31663 |
30.35 |
| 2026-10-08 00:00 |
06:39:34.50 |
+21:29:13.8 |
HIP 31663 |
30.33 |
| 2026-10-08 12:00 |
06:39:34.37 |
+21:29:13.4 |
HIP 31663 |
30.30 |
| 2026-10-09 00:00 |
06:39:34.22 |
+21:29:13.1 |
HIP 31663 |
30.27 |
| 2026-10-09 12:00 |
06:39:34.07 |
+21:29:12.8 |
HIP 31663 |
30.24 |
| 2026-10-10 00:00 |
06:39:33.90 |
+21:29:12.5 |
HIP 31663 |
30.21 |
| 2026-10-10 12:00 |
06:39:33.72 |
+21:29:12.2 |
HIP 31663 |
30.18 |
| 2026-10-11 00:00 |
06:39:33.53 |
+21:29:11.9 |
HIP 31663 |
30.14 |