C/1992 B1 (Bradfield)
メタデータ
| 項目 |
値 |
| Designation |
C/1992 B1 (Bradfield) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-03-19T12:58:11.899200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
19 |
| 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) |
1992-02-10.0000000 |
| e |
0.99992571 |
| q (au) |
0.500109 |
| a (au) |
6732.201164 |
| i (deg) |
20.237830 |
| Ω (om, deg) |
275.347033 |
| ω (w, deg) |
15.346028 |
| M (ma, deg) |
359.999931 |
等級
散乱 + 全体線形
$$
M_a = (9.662 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.662 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
06:39:48.17 |
+21:27:27.5 |
HIP 31848 |
32.96 |
| 2026-02-03 12:00 |
06:39:46.37 |
+21:27:29.5 |
HIP 31848 |
32.88 |
| 2026-02-04 00:00 |
06:39:44.58 |
+21:27:31.6 |
HIP 31848 |
32.80 |
| 2026-02-04 12:00 |
06:39:42.80 |
+21:27:33.6 |
HIP 31848 |
32.73 |
| 2026-02-05 00:00 |
06:39:41.03 |
+21:27:35.7 |
HIP 31663 |
32.42 |
| 2026-02-05 12:00 |
06:39:39.27 |
+21:27:37.7 |
HIP 31663 |
32.04 |
| 2026-02-06 00:00 |
06:39:37.52 |
+21:27:39.7 |
HIP 31663 |
31.67 |
| 2026-02-06 12:00 |
06:39:35.79 |
+21:27:41.8 |
HIP 31663 |
31.30 |
| 2026-02-07 00:00 |
06:39:34.07 |
+21:27:43.8 |
HIP 31663 |
30.93 |
| 2026-02-07 12:00 |
06:39:32.36 |
+21:27:45.8 |
HIP 31663 |
30.57 |
| 2026-02-08 00:00 |
06:39:30.67 |
+21:27:47.8 |
HIP 31663 |
30.21 |
| 2026-02-08 12:00 |
06:39:28.99 |
+21:27:49.8 |
HIP 31663 |
29.85 |
| 2026-02-09 00:00 |
06:39:27.32 |
+21:27:51.8 |
HIP 31663 |
29.50 |
| 2026-02-09 12:00 |
06:39:25.66 |
+21:27:53.8 |
HIP 31663 |
29.15 |
| 2026-02-10 00:00 |
06:39:24.02 |
+21:27:55.8 |
HIP 31663 |
28.80 |
| 2026-02-10 12:00 |
06:39:22.39 |
+21:27:57.7 |
HIP 31663 |
28.46 |
| 2026-02-11 00:00 |
06:39:20.77 |
+21:27:59.7 |
HIP 31663 |
28.12 |
| 2026-02-11 12:00 |
06:39:19.17 |
+21:28:01.6 |
HIP 31663 |
27.79 |
| 2026-02-12 00:00 |
06:39:17.58 |
+21:28:03.6 |
HIP 31663 |
27.46 |
| 2026-02-12 12:00 |
06:39:16.00 |
+21:28:05.5 |
HIP 31663 |
27.13 |
| 2026-02-13 00:00 |
06:39:14.44 |
+21:28:07.5 |
HIP 31663 |
26.81 |
| 2026-02-13 12:00 |
06:39:12.89 |
+21:28:09.4 |
HIP 31663 |
26.49 |
| 2026-02-14 00:00 |
06:39:11.36 |
+21:28:11.3 |
HIP 31663 |
26.17 |
| 2026-02-14 12:00 |
06:39:09.84 |
+21:28:13.2 |
HIP 31663 |
25.86 |
| 2026-02-15 00:00 |
06:39:08.34 |
+21:28:15.1 |
HIP 31663 |
25.55 |
| 2026-02-15 12:00 |
06:39:06.85 |
+21:28:17.0 |
HIP 31663 |
25.25 |
| 2026-02-16 00:00 |
06:39:05.37 |
+21:28:18.8 |
HIP 31663 |
24.95 |
| 2026-02-16 12:00 |
06:39:03.91 |
+21:28:20.7 |
HIP 31663 |
24.65 |
| 2026-02-17 00:00 |
06:39:02.47 |
+21:28:22.6 |
HIP 31663 |
24.36 |
| 2026-02-17 12:00 |
06:39:01.04 |
+21:28:24.4 |
HIP 31663 |
24.07 |
| 2026-02-18 00:00 |
06:38:59.62 |
+21:28:26.2 |
HIP 31663 |
23.79 |
| 2026-02-18 12:00 |
06:38:58.22 |
+21:28:28.1 |
HIP 31663 |
23.51 |
| 2026-02-19 00:00 |
06:38:56.84 |
+21:28:29.9 |
HIP 31663 |
23.24 |
| 2026-02-19 12:00 |
06:38:55.47 |
+21:28:31.7 |
HIP 31663 |
22.97 |
| 2026-02-20 00:00 |
06:38:54.11 |
+21:28:33.5 |
HIP 31663 |
22.70 |
| 2026-02-20 12:00 |
06:38:52.78 |
+21:28:35.3 |
HIP 31663 |
22.44 |
| 2026-02-21 00:00 |
06:38:51.45 |
+21:28:37.0 |
HIP 31663 |
22.18 |
| 2026-02-21 12:00 |
06:38:50.15 |
+21:28:38.8 |
HIP 31663 |
21.93 |
| 2026-02-22 00:00 |
06:38:48.86 |
+21:28:40.5 |
HIP 31663 |
21.68 |
| 2026-02-22 12:00 |
06:38:47.59 |
+21:28:42.3 |
HIP 31663 |
21.43 |
| 2026-02-23 00:00 |
06:38:46.33 |
+21:28:44.0 |
HIP 31663 |
21.19 |
| 2026-02-23 12:00 |
06:38:45.09 |
+21:28:45.7 |
HIP 31663 |
20.96 |
| 2026-02-24 00:00 |
06:38:43.86 |
+21:28:47.4 |
HIP 31663 |
20.73 |